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【C#】分享一个带叠加消息的增强消息框MessageBoxEx

热度:66   发布时间:2016-05-05 03:16:03.0
【C#】分享一个带附加消息的增强消息框MessageBoxEx

--------------201507091034更新---------------

首先感谢猿友E204在回复中的反馈。

  • 解决双击【详细信息】按钮造成的Checked状态改变问题,办法是让ToggleButton忽略WM_LBUTTONDBLCLK消息
  • 修正收起详细信息区逻辑,改为直接取用plAttachZone.Height。之前是取ExpandHeight,会造成视觉体验问题

--------------201507082014原文(已更新)---------------

适用于:.net 2.0+的Winform项目

样子:

有损录制+制图的原因不可能原样展示出真实效果,可至文章结尾下载Demo体验。

功能和特点:

  • 相对父窗体居中
  • 可附带附加消息。附加消息可以是string和Exception类型,【详细信息】按钮会根据是否传入附加信息显示和隐藏。传入Exception实例时,呈现的是exception.ToString(),也就是可能携带StackTrace信息,所以如果你只是想呈现异常文本,还是老实传入ex.Message
  • 展开/收起附加信息时有动画效果。实用为王的你亦可设置EnableAnimate=false关闭动画效果
  • 根据传入的MessageBoxIcon,有不同的声音反馈。这个是NT5的消息框固有的能力,但NT6的消息框却没有声音,猜想可能MS在NT6+有弃用MessageBeep这一API的打算。本消息框通过使用PlaySound API重新让消息有了声音反馈,同时亦提供了EnableSound属性允许你关闭声音反馈
  • 移除了标准MessageBox提供的IWin32Window、MessageBoxOptions和Help相关参数,原因是我用不到,懒得实现^_^
  • 可拖拉改变消息框尺寸,消息文本和附加文本会随窗体大小重排。这是标准消息框未提供的能力。改变尺寸分两种情况有不同的行为:①详细信息未展开时,改变的是主消息区大小;②详细信息展开时,改变的是详细信息区的大小

总体来说,此消息框比较适合用在需要反馈大量消息文本的场合,用标准消息框的话,文本太多可能会使消息框超出屏幕大小,比如codeproject.com上这位老兄举的例子,由于标准消息框不具备改变窗体大小的能力,将导致部分消息无法让用户看到。而就算没有超出屏幕,一下子让用户面对那么多消息文字,体验也不地道。使用本消息框就可以解决此类问题,比如可以将扼要信息显示在主消息区,将大量的明细消息(例如批量处理中的单项处理情况)、次要消息、异常信息等放置在详细信息区,由用户或IT支持人员自己去展开获取这些信息。同时,在没有附加消息的时候,你仍然可以像标准消息框一样使用它,所以,如果你跟我一样不会用到标准消息框的IWin32Window、MessageBoxOptions和Help相关参数的话,基本上你可以在整个项目中全程用此消息框替换掉标准消息框,别忘了相比标准消息框,它还具备了可缩放、NT6下有声音、相对父窗体居中等额外能力。总言之,你值得拥有。至于如果你担心性能问题,这个~我想这么说,我对自己的代码质量还是有点信心的。也希望能得大侠指出槽点,感激!

使用说明:

先看公开成员:

//静态属性MessageBoxEx.EnableAnimateMessageBoxEx.EnableSound//静态方法MessageBoxEx.Show(string, string, string)MessageBoxEx.Show(string, string, string, MessageBoxButtons)MessageBoxEx.Show(string, string, string, MessageBoxButtons, MessageBoxIcon)MessageBoxEx.Show(string, string, string, MessageBoxButtons, MessageBoxIcon, MessageBoxDefaultButton)MessageBoxEx.Show(string, string, Exception)MessageBoxEx.Show(string, string, Exception, MessageBoxButtons)MessageBoxEx.Show(string, string, Exception, MessageBoxButtons, MessageBoxIcon)MessageBoxEx.Show(string, string, Exception, MessageBoxButtons, MessageBoxIcon, MessageBoxDefaultButton)
  • 属性EnableAnimate和EnableSound上面提过,分别是用来启用/关闭动画、声音效果的,默认是都启用。俩属性影响范围是全局的,比如设置EnableAnimate = false后,之后弹出的MessageBoxEx都没有动画效果,直到重新设为true,EnableSound亦然。最佳实践是将它俩与用户偏好设置相关联,允许用户自主控制。
  • 方法则只有一个:Show(),从重载列表你大概都能知道如何使用。其中第3个参数就是附加消息,可接受string和Exception类的实例,其余参数的位置和意义与标准消息框一致。简要示例如下:
    MessageBoxEx.Show("主消息", "标题", "附加消息", MessageBoxButtons.OK, MessageBoxIcon.None, MessageBoxDefaultButton.Button1);MessageBoxEx.Show("主消息", "标题", ex, MessageBoxButtons.OK, MessageBoxIcon.None, MessageBoxDefaultButton.Button1);
  • 前3个参数可以放心为null,内部有处理,后面的枚举你也null不了,如果传入无效枚举值,会抛异常
  • 只有3个string参数的那个方法,后面俩参数是可选的。所以不讲究消息体验的你仍然可以这样使用:
    MessageBoxEx.Show("阿斯顿发");MessageBoxEx.Show("阿斯顿发", "士大夫");

方案源码:

代码不少,原因自然是有的,有兴趣的童鞋请看后面的实现说明。另外,千万不要认为代码量跟性能有直接关系,有时候更多的代码恰恰是为了提升性能而存在,有时候则是为了健壮性。

using System;using System.ComponentModel;using System.Drawing;using System.IO;using System.Runtime.InteropServices;using System.Threading;using System.Windows.Forms;namespace AhDung.WinForm{    /// <summary>    /// 可以携带详细信息的消息框    /// </summary>    public static class MessageBoxEx    {        //异常消息文本        private const string InvalidButtonExString = "按钮参数不是有效的枚举项!";        private const string InvalidIconExString = "图标参数不是有效的枚举项!";        private const string InvalidDfButtonExString = "默认按钮参数不是有效的枚举项!";        /// <summary>        /// 是否启用动画效果        /// </summary>        public static bool EnableAnimate { get; set; }        /// <summary>        /// 是否启用声音反馈        /// </summary>        public static bool EnableSound { get; set; }        //静态构造        static MessageBoxEx()        {            //默认启用动画+声音            EnableAnimate = true;            EnableSound = true;        }        #region 公开方法        /// <summary>        /// 显示消息框        /// </summary>        /// <param name="message">消息文本</param>        /// <param name="caption">消息框标题</param>        /// <param name="attachMessage">附加消息</param>        public static DialogResult Show(string message, string caption = null, string attachMessage = null)        {            return ShowCore(message, caption, attachMessage, MessageBoxButtons.OK, MessageBoxIcon.None, MessageBoxDefaultButton.Button1);        }        /*下面这仨弄成重载而不是可选方法是为了避免不必要的参数检查*/        /// <summary>        /// 显示消息框        /// </summary>        /// <param name="message">消息文本</param>        /// <param name="caption">消息框标题</param>        /// <param name="attachMessage">附加消息</param>        /// <param name="buttons">按钮组合</param>        public static DialogResult Show(string message, string caption, string attachMessage, MessageBoxButtons buttons)        {            if (!Enum.IsDefined(typeof(MessageBoxButtons), buttons)) { throw new InvalidEnumArgumentException(InvalidButtonExString); }            return ShowCore(message, caption, attachMessage, buttons, MessageBoxIcon.None, MessageBoxDefaultButton.Button1);        }        /// <summary>        /// 显示消息框        /// </summary>        /// <param name="message">消息文本</param>        /// <param name="caption">消息框标题</param>        /// <param name="attachMessage">附加消息</param>        /// <param name="buttons">按钮组合</param>        /// <param name="icon">图标</param>        public static DialogResult Show(string message, string caption, string attachMessage, MessageBoxButtons buttons, MessageBoxIcon icon)        {            if (!Enum.IsDefined(typeof(MessageBoxButtons), buttons)) { throw new InvalidEnumArgumentException(InvalidButtonExString); }            if (!Enum.IsDefined(typeof(MessageBoxIcon), icon)) { throw new InvalidEnumArgumentException(InvalidIconExString); }            return ShowCore(message, caption, attachMessage, buttons, icon, MessageBoxDefaultButton.Button1);        }        /// <summary>        /// 显示消息框        /// </summary>        /// <param name="message">消息文本</param>        /// <param name="caption">消息框标题</param>        /// <param name="attachMessage">附加消息</param>        /// <param name="buttons">按钮组合</param>        /// <param name="icon">图标</param>        /// <param name="defaultButton">默认按钮</param>        public static DialogResult Show(string message, string caption, string attachMessage, MessageBoxButtons buttons, MessageBoxIcon icon, MessageBoxDefaultButton defaultButton)        {            if (!Enum.IsDefined(typeof(MessageBoxButtons), buttons)) { throw new InvalidEnumArgumentException(InvalidButtonExString); }            if (!Enum.IsDefined(typeof(MessageBoxIcon), icon)) { throw new InvalidEnumArgumentException(InvalidIconExString); }            if (!Enum.IsDefined(typeof(MessageBoxDefaultButton), defaultButton)) { throw new InvalidEnumArgumentException(InvalidDfButtonExString); }            return ShowCore(message, caption, attachMessage, buttons, icon, defaultButton);        }        /********传入异常的重载********/        /// <summary>        /// 显示消息框        /// </summary>        /// <param name="message">消息文本</param>        /// <param name="caption">消息框标题</param>        /// <param name="exception">异常实例</param>        public static DialogResult Show(string message, string caption, Exception exception)        {            return Show(message, caption, exception == null ? string.Empty : exception.ToString());        }        /// <summary>        /// 显示消息框        /// </summary>        /// <param name="message">消息文本</param>        /// <param name="caption">消息框标题</param>        /// <param name="exception">异常实例</param>        /// <param name="buttons">按钮组合</param>        public static DialogResult Show(string message, string caption, Exception exception, MessageBoxButtons buttons)        {            return Show(message, caption, exception == null ? string.Empty : exception.ToString(), buttons);        }        /// <summary>        /// 显示消息框        /// </summary>        /// <param name="message">消息文本</param>        /// <param name="caption">消息框标题</param>        /// <param name="exception">异常实例</param>        /// <param name="buttons">按钮组合</param>        /// <param name="icon">图标</param>        public static DialogResult Show(string message, string caption, Exception exception, MessageBoxButtons buttons, MessageBoxIcon icon)        {            return Show(message, caption, exception == null ? string.Empty : exception.ToString(), buttons, icon);        }        /// <summary>        /// 显示消息框        /// </summary>        /// <param name="message">消息文本</param>        /// <param name="caption">消息框标题</param>        /// <param name="exception">异常实例</param>        /// <param name="buttons">按钮组合</param>        /// <param name="icon">图标</param>        /// <param name="defaultButton">默认按钮</param>        public static DialogResult Show(string message, string caption, Exception exception, MessageBoxButtons buttons, MessageBoxIcon icon, MessageBoxDefaultButton defaultButton)        {            return Show(message, caption, exception == null ? string.Empty : exception.ToString(), buttons, icon, defaultButton);        }        #endregion        //内部方法,不检查参数有效性        private static DialogResult ShowCore(string message, string caption, string attachMessage, MessageBoxButtons buttons, MessageBoxIcon icon, MessageBoxDefaultButton defaultButton)        {            using (MessageForm f = new MessageForm(message, caption, buttons, icon, defaultButton, attachMessage, EnableAnimate, EnableSound))            {                return f.ShowDialog();            }        }        /*----------------         下面是消息窗体相关         ---------------*/        /// <summary>        /// 消息窗体        /// </summary>        /// <remarks>参数有效性由MessageBoxEx负责</remarks>        private class MessageForm : Form        {            /* todo 存在问题:             * 当消息区文本非常非常多时,且反复进行改变消息框窗口大小、位置、展开收起的操作,那么在某次展开时               详细信息文本框可能会在原位置(即消息区内某rect)瞬闪一下,               原因是文本框控件在显示时总会在原位置WM_NCPAINT + WM_ERASEBKGND一下,暂无解决办法。               实际应用中碰到的几率很小,就算碰到,影响也可以忽略。             */            #region 控件初始化            /// <summary>            /// 必需的设计器变量。            /// </summary>            private System.ComponentModel.IContainer components = null;            /// <summary>            /// 清理所有正在使用的资源。            /// </summary>            /// <param name="disposing">如果应释放托管资源,为 true;否则为 false。</param>            protected override void Dispose(bool disposing)            {                if (disposing && (components != null))                {                    components.Dispose();                }                base.Dispose(disposing);            }            #region Windows 窗体设计器生成的代码            /// <summary>            /// 设计器支持所需的方法 - 不要            /// 使用代码编辑器修改此方法的内容。            /// </summary>            private void InitializeComponent()            {                this.button3 = new System.Windows.Forms.Button();                this.txbAttach = new TextBoxUnSelectAllable();                this.button2 = new System.Windows.Forms.Button();                this.button1 = new System.Windows.Forms.Button();                this.plButtonsZone = new AhDung.WinForm.MessageBoxEx.MessageForm.PanelBasic();                this.ckbToggle = new AhDung.WinForm.MessageBoxEx.MessageForm.ToggleButton(this.UseAnimate);                this.plAttachZone = new AhDung.WinForm.MessageBoxEx.MessageForm.PanelBasic();                this.lbMsg = new AhDung.WinForm.MessageBoxEx.MessageForm.MessageViewer();                this.plButtonsZone.SuspendLayout();                this.plAttachZone.SuspendLayout();                this.SuspendLayout();                //                 // button3                //                 this.button3.Anchor = System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right;                this.button3.Location = new System.Drawing.Point(320, 8);                this.button3.Margin = new System.Windows.Forms.Padding(3, 2, 3, 2);                this.button3.Name = "button3";                this.button3.Size = new System.Drawing.Size(85, 27);                this.button3.TabIndex = 2;                //                 // txbAttach                //                 this.txbAttach.Anchor = ((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)                                         | System.Windows.Forms.AnchorStyles.Left)                                         | System.Windows.Forms.AnchorStyles.Right;                this.txbAttach.Location = new System.Drawing.Point(10, 7);                this.txbAttach.Margin = new System.Windows.Forms.Padding(3, 1, 3, 1);                this.txbAttach.Name = "txbAttach";                this.txbAttach.ReadOnly = true;                this.txbAttach.Multiline = true;                this.txbAttach.ScrollBars = System.Windows.Forms.ScrollBars.Vertical;                this.txbAttach.Size = new System.Drawing.Size(395, 105);                this.txbAttach.TabIndex = 0;                //                 // button2                //                 this.button2.Anchor = System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right;                this.button2.Location = new System.Drawing.Point(229, 8);                this.button2.Margin = new System.Windows.Forms.Padding(3, 2, 3, 2);                this.button2.Name = "button2";                this.button2.Size = new System.Drawing.Size(85, 27);                this.button2.TabIndex = 1;                //                 // button1                //                 this.button1.Anchor = System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right;                this.button1.Location = new System.Drawing.Point(138, 8);                this.button1.Margin = new System.Windows.Forms.Padding(3, 2, 3, 2);                this.button1.Name = "button1";                this.button1.Size = new System.Drawing.Size(85, 27);                this.button1.TabIndex = 0;                //                 // plButtonsZone                //                 this.plButtonsZone.Controls.Add(this.ckbToggle);                this.plButtonsZone.Controls.Add(this.button1);                this.plButtonsZone.Controls.Add(this.button2);                this.plButtonsZone.Controls.Add(this.button3);                this.plButtonsZone.Dock = System.Windows.Forms.DockStyle.Bottom;                this.plButtonsZone.Location = new System.Drawing.Point(0, 96);                this.plButtonsZone.Margin = new System.Windows.Forms.Padding(3, 1, 3, 1);                this.plButtonsZone.Name = "plButtonsZone";                this.plButtonsZone.Size = new System.Drawing.Size(415, 36);                this.plButtonsZone.TabIndex = 1;                //                 // ckbToggle                //                 this.ckbToggle.Location = new System.Drawing.Point(10, 8);                this.ckbToggle.Name = "ckbToggle";                this.ckbToggle.Size = new System.Drawing.Size(93, 27);                this.ckbToggle.TabIndex = 3;                this.ckbToggle.Text = "详细信息(&D)";                this.ckbToggle.CheckedChanged += this.ckbToggle_CheckedChanged;                //                 // plAttachZone                //                 this.plAttachZone.Controls.Add(this.txbAttach);                this.plAttachZone.Dock = System.Windows.Forms.DockStyle.Fill;                this.plAttachZone.Location = new System.Drawing.Point(0, 130);                this.plAttachZone.Margin = new System.Windows.Forms.Padding(3, 2, 3, 2);                this.plAttachZone.Name = "plAttachZone";                this.plAttachZone.Size = new System.Drawing.Size(415, 114);                this.plAttachZone.TabIndex = 2;                this.plAttachZone.Visible = false;                //                 // lbMsg                //                 this.lbMsg.Dock = System.Windows.Forms.DockStyle.Fill;                this.lbMsg.Icon = null;                this.lbMsg.Location = new System.Drawing.Point(0, 0);                this.lbMsg.Name = "lbMsg";                this.lbMsg.Padding = new System.Windows.Forms.Padding(21, 18, 21, 18);                //this.lbMsg.Size = new System.Drawing.Size(415, 96);                this.lbMsg.TabIndex = 0;                //                 // FmMsg                //                 this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.None;                //this.ClientSize = new System.Drawing.Size(415, 261);                this.Controls.Add(this.lbMsg);                this.Controls.Add(this.plButtonsZone);                this.Controls.Add(this.plAttachZone);                this.DoubleBuffered = true;                this.MaximizeBox = false;                this.Name = "MessageForm";                this.Padding = new System.Windows.Forms.Padding(0, 0, 0, 17);                this.ShowIcon = false;                this.ShowInTaskbar = false;                this.SizeGripStyle = System.Windows.Forms.SizeGripStyle.Show;                this.plButtonsZone.ResumeLayout(false);                this.plAttachZone.ResumeLayout(false);                this.plAttachZone.PerformLayout();                this.ResumeLayout(false);            }            #endregion            private ToggleButton ckbToggle;            private TextBoxUnSelectAllable txbAttach;            private MessageViewer lbMsg;            private System.Windows.Forms.Button button2;            private System.Windows.Forms.Button button1;            private PanelBasic plButtonsZone;            private PanelBasic plAttachZone;            private System.Windows.Forms.Button button3;            #endregion            /// <summary>            /// 最大默认窗体客户区宽度            /// </summary>            const int MaxClientWidth = 700;            int expandHeight;            /// <summary>            /// 详细信息区展开高度            /// </summary>            private int ExpandHeight            {                get { return expandHeight < 150 ? 150 : expandHeight; }                set { expandHeight = value; }            }            #region 属性            /// <summary>            /// 是否启用动画效果            /// </summary>            /// <remarks>此处还弄该属性是为了保证窗体类的独立性</remarks>            private bool UseAnimate { get; set; }            /// <summary>            /// 是否启用声音反馈            /// </summary>            /// <remarks>此处还弄该属性是为了保证窗体类的独立性</remarks>            private bool UseSound { get; set; }            /// <summary>            /// 消息按钮            /// </summary>            private MessageBoxButtons MessageButtons { get; set; }            /// <summary>            /// 消息图标            /// </summary>            private MessageBoxIcon MessageIcon { get; set; }            /// <summary>            /// 默认按钮            /// </summary>            private MessageBoxDefaultButton DefaultButton { get; set; }            #endregion            /// <summary>            /// 创建消息窗体            /// </summary>            private MessageForm(bool enableAnimate)            {                this.UseAnimate = enableAnimate;//须尽早设置,要供展开按钮初始化用                InitializeComponent();                this.StartPosition = Form.ActiveForm == null ? FormStartPosition.CenterScreen : FormStartPosition.CenterParent;                this.Font = SystemFonts.MessageBoxFont;                //注册事件                this.button1.Click += button_Click;                this.button2.Click += button_Click;                this.button3.Click += button_Click;                this.plAttachZone.Resize += plAttachZone_Resize;            }            /// <summary>            /// 创建消息窗体            /// </summary>            public MessageForm(string message, string caption, MessageBoxButtons buttons, MessageBoxIcon icon, MessageBoxDefaultButton defaultButton, string attachMessage, bool enableAnimate, bool enableSound)                : this(enableAnimate)            {                this.lbMsg.Text = message;                this.Text = caption;                this.txbAttach.Text = attachMessage;                this.MessageButtons = buttons;                this.MessageIcon = icon;                this.DefaultButton = defaultButton;                this.UseSound = enableSound;            }            #region 重写基类方法            protected override void OnLoad(EventArgs e)            {                //须在计算各种尺寸前搞掂                ProcessIcon();                ProcessButtons();                this.MinimumSize = SizeFromClientSize(new Size(GetPanelButtonMinWidth(), GetClientMinHeight()));                //参数意义定为客户区最大大小,所以需刨掉非客户区高度后传入                this.ClientSize = this.GetPreferredSize(new Size(MaxClientWidth, Screen.PrimaryScreen.WorkingArea.Height - (this.Height - this.ClientSize.Height)));                base.OnLoad(e);            }            protected override void OnShown(EventArgs e)            {                //设置默认按钮焦点。须在OnShown中设置按钮焦点才有用                Button dfBtn;                if ((dfBtn = this.AcceptButton as Button) != null)                {                    dfBtn.Focus();                }                //播放消息提示音                if (this.UseSound) { PlayMessageSound(this.MessageIcon); }                base.OnShown(e);            }            //重写窗体参数            protected override CreateParams CreateParams            {                get                {                    CreateParams prms = base.CreateParams;                    if ((Convert.ToInt32(this.MessageButtons) & 1) == 0) //没有Cancel按钮时屏蔽关闭按钮,刚好在偶数项                    {                        prms.ClassStyle |= 0x200;                    }                    return prms;                }            }            /// <summary>            /// 计算合适的窗口尺寸            /// </summary>            /// <param name="proposedSize">该参数此处定义为客户区可设置的最大尺寸</param>            public override Size GetPreferredSize(Size proposedSize)            {                int reservedHeight = plButtonsZone.Height + Padding.Bottom;                Size size = lbMsg.GetPreferredSize(new Size(proposedSize.Width, proposedSize.Height - reservedHeight));                size.Height += reservedHeight;                return size;            }            #endregion            #region 事件处理方法            //展开收起            private void ckbToggle_CheckedChanged(object sender, EventArgs e)            {                this.SuspendLayout();                if (ckbToggle.Checked)                {                    plButtonsZone.SendToBack();                    lbMsg.SendToBack();                    lbMsg.Dock = DockStyle.Top;                    plButtonsZone.Dock = DockStyle.Top;                    ChangeFormHeight(ExpandHeight);                    plAttachZone.Visible = true;                }                else                {                    ExpandHeight = plAttachZone.Height;//为再次展开记忆高度                    plAttachZone.Visible = false;                    ChangeFormHeight(-plAttachZone.Height);//收起时直接取pl高度,不要取ExpandHeight                    plButtonsZone.SendToBack();                    plButtonsZone.Dock = DockStyle.Bottom;                    lbMsg.Dock = DockStyle.Fill;                }                this.ResumeLayout();            }            //按钮事件            private void button_Click(object sender, EventArgs e)            {                this.DialogResult = (DialogResult)((sender as Button).Tag);            }            //用户手工收完详细区则触发折叠            private void plAttachZone_Resize(object sender, EventArgs e)            {                if (ckbToggle.Checked && plAttachZone.Height == 0)                {                    ckbToggle.Checked = false;                }            }            #endregion            #region 辅助+私有方法            /// <summary>            /// 处理按钮相关            /// </summary>            private void ProcessButtons()            {                this.ckbToggle.Visible = txbAttach.Text.Trim().Length != 0; //无详细信息就不显示展开按钮                int btnCount = 3; //按钮数量                switch (MessageButtons) //老实用case,可读点                {                    case MessageBoxButtons.AbortRetryIgnore:                        button1.Text = "中止(&A)";                        button1.Tag = DialogResult.Abort;                        button2.Text = "重试(&R)";                        button2.Tag = DialogResult.Retry;                        button3.Text = "忽略(&I)";                        button3.Tag = DialogResult.Ignore;                        break;                    case MessageBoxButtons.OK:                        button1.Visible = false;                        button2.Visible = false;                        button3.Text = "确定";                        button3.Tag = DialogResult.OK;                        btnCount = 1;                        break;                    case MessageBoxButtons.OKCancel:                        button1.Visible = false;                        button2.Text = "确定";                        button2.Tag = DialogResult.OK;                        button3.Text = "取消";                        button3.Tag = DialogResult.Cancel;                        btnCount = 2;                        break;                    case MessageBoxButtons.RetryCancel:                        button1.Visible = false;                        button2.Text = "重试(&R)";                        button2.Tag = DialogResult.Retry;                        button3.Text = "取消";                        button3.Tag = DialogResult.Cancel;                        btnCount = 2;                        break;                    case MessageBoxButtons.YesNo:                        button1.Visible = false;                        button2.Text = "是(&Y)";                        button2.Tag = DialogResult.Yes;                        button3.Text = "否(&N)";                        button3.Tag = DialogResult.No;                        btnCount = 2;                        break;                    case MessageBoxButtons.YesNoCancel:                        button1.Text = "是(&Y)";                        button1.Tag = DialogResult.Yes;                        button2.Text = "否(&N)";                        button2.Tag = DialogResult.No;                        button3.Text = "取消";                        button3.Tag = DialogResult.Cancel;                        break;                    default:                        break;                }                //仅有OK和有取消按钮时设CancelButton                if ((int)MessageButtons == 0 || ((int)MessageButtons & 1) == 1)                {                    this.CancelButton = button3;                }                //处理默认按钮                if (btnCount == 1)                {                    this.AcceptButton = button3;                }                else if (btnCount == 2)                {                    this.AcceptButton = DefaultButton == MessageBoxDefaultButton.Button2 ? button3 : button2;                }                else                {                    Button[] btnArray = { button1, button2, button3 };                    this.AcceptButton = btnArray[Convert.ToInt32(DefaultButton) / 0x100];                }            }            /// <summary>            /// 处理图标            /// </summary>            /// <remarks>之所以不在此处顺便把Sound处理了是为了松耦合</remarks>            private void ProcessIcon()            {                switch (MessageIcon)                {                    //MessageBoxIcon.Information同样                    case MessageBoxIcon.Asterisk:                        lbMsg.Icon = SystemIcons.Information;                        break;                    //MessageBoxIcon.Hand、MessageBoxIcon.Stop同样                    case MessageBoxIcon.Error:                        lbMsg.Icon = SystemIcons.Error;                        break;                    //MessageBoxIcon.Warning同样                    case MessageBoxIcon.Exclamation:                        lbMsg.Icon = SystemIcons.Warning;                        break;                    case MessageBoxIcon.Question:                        lbMsg.Icon = SystemIcons.Question;                        break;                    default:                        lbMsg.Icon = null;                        break;                }            }            /// <summary>            /// 计算窗体客户区最小高度            /// </summary>            private int GetClientMinHeight()            {                return lbMsg.MinimumHeight + plButtonsZone.Height + Padding.Bottom;            }            /// <summary>            /// 计算按钮区最小宽度            /// </summary>            private int GetPanelButtonMinWidth()            {                int r = 20 /*左右Padding*/, visibleCount = -1 /*因为两个以上才会有间距*/;                if (ckbToggle.Visible)                {                    r += ckbToggle.Width;                    visibleCount++;                }                if (button1.Visible)                {                    r += button1.Width * 3;                    visibleCount += 3;                }                else if (button2.Visible)                {                    r += button2.Width * 2;                    visibleCount += 2;                }                else                {                    r += button3.Width;                    visibleCount++;                }                if (visibleCount != -1)                {                    r += visibleCount * 6;                } //按钮间距                return r;            }            /// <summary>            /// 改变窗体高度。内部有动画处理            /// </summary>            /// <param name="increment">增量(负数即为减小高度)</param>            private void ChangeFormHeight(int increment)            {                int finalHeight = this.Height + increment; //正确的目标高度                if (!this.UseAnimate) //不使用动画                {                    this.Height = finalHeight;                    return;                }                const int step = 8; //帧数                for (int i = 0; i < step; i++)                {                    if (i == step - 1) //最后一步直达目标                    {                        this.Height = finalHeight;                        return;                    }                    this.Height += increment / step;                    Application.DoEvents(); //必要                    Thread.Sleep(10);                }            }            /// <summary>            /// 播放系统事件声音            /// </summary>            /// <remarks>之所以不用MessageBeep API是因为这货在NT6上不出声,所以用PlaySound代替</remarks>            private static void PlayMessageSound(MessageBoxIcon msgType)            {                string eventString;                switch (msgType)                {                    case MessageBoxIcon.None:                        eventString = "SystemDefault";                        break;                    //Question原本是没声音的,此实现让它蹭一下Information的                    case MessageBoxIcon.Question:                    //MessageBoxIcon.Information同样                    case MessageBoxIcon.Asterisk:                        eventString = "SystemAsterisk";                        break;                    //MessageBoxIcon.Hand、MessageBoxIcon.Stop同样                    case MessageBoxIcon.Error:                        eventString = "SystemHand";                        break;                    //MessageBoxIcon.Warning同样                    case MessageBoxIcon.Exclamation:                        eventString = "SystemExclamation";                        break;                    default:                        throw new ArgumentOutOfRangeException();                }                PlaySound(eventString, IntPtr.Zero, 0x10000 /*SND_ALIAS*/| 0x1 /*SND_ASYNC*/);            }            [DllImport("winmm.dll", CharSet = CharSet.Auto)]            private static extern bool PlaySound([MarshalAs(UnmanagedType.LPWStr)] string soundName, IntPtr hmod, int soundFlags);            #endregion            #region 嵌套类            /// <summary>            /// 基础面板            /// </summary>            private class PanelBasic : Control            {                public PanelBasic()                {                    SetStyle(ControlStyles.AllPaintingInWmPaint, false);//关键,不要设置双缓冲,不然其上的ToolBar不正常                    SetStyle(ControlStyles.OptimizedDoubleBuffer, true);//重要。不设置的话控件绘制不正常                    SetStyle(ControlStyles.ContainerControl, true);                    SetStyle(ControlStyles.Selectable, false);                }                protected override void WndProc(ref Message m)                {                    //屏蔽WM_ERASEBKGND。防止显示时在原位置快闪                    //不能通过ControlStyles.AllPaintingInWmPaint=true屏蔽                    //会影响其上的ToolBar                    if (m.Msg == 0x14) { return; }                    base.WndProc(ref m);                }                protected override void SetBoundsCore(int x, int y, int width, int height, BoundsSpecified specified)                {                    //防Dock时面板短暂滞留在原位置                    base.SetBoundsCore(x, y, width, height, specified | BoundsSpecified.Y | BoundsSpecified.Width);                }            }            /// <summary>            /// 消息呈现控件            /// </summary>            private class MessageViewer : Control            {                const TextFormatFlags textFlags = TextFormatFlags.EndEllipsis //未完省略号                                                  | TextFormatFlags.WordBreak //允许换行                                                  | TextFormatFlags.NoPadding //无边距                                                  | TextFormatFlags.ExternalLeading //行间空白。NT5必须,不然文字挤在一起                                                  | TextFormatFlags.TextBoxControl; //避免半行                const int IconSpace = 5; //图标与文本间距                const float PreferredScale = 13;//最佳文本区块比例(宽/高)                /// <summary>                /// 最小高度。不要重写MinimumSize,那会在窗体移动和缩放时都会执行                /// </summary>                public int MinimumHeight                {                    get                    {                        return (this.Icon != null ? Math.Max(this.Icon.Height, this.Font.Height) : this.Font.Height) + Padding.Vertical;                    }                }                /// <summary>                /// 获取或设置图标                /// </summary>                public Icon Icon { get; set; }                public MessageViewer()                {                    this.SetStyle(ControlStyles.CacheText, true);                    this.SetStyle(ControlStyles.UserPaint, true);                    this.SetStyle(ControlStyles.AllPaintingInWmPaint, true);                    this.SetStyle(ControlStyles.Selectable, false);                    this.SetStyle(ControlStyles.ResizeRedraw, true); //重要                    this.DoubleBuffered = true; //双缓冲                    BackColor = Environment.OSVersion.Version.Major == 5 ? SystemColors.Control : Color.White;                }                //防Dock改变尺寸                protected override void SetBoundsCore(int x, int y, int width, int height, BoundsSpecified specified)                {                    base.SetBoundsCore(x, y, width, height, specified | BoundsSpecified.Size);                }                /// <summary>                /// 计算合适的消息区尺寸                /// </summary>                /// <param name="proposedSize">该参数此处定义为此控件可设置的最大尺寸</param>                /// <remarks>该方法对太长的单行文本有做比例优化处理,避免用户摆头幅度过大扭到脖子</remarks>                public override Size GetPreferredSize(Size proposedSize)                {                    if (proposedSize.Width < 10) { proposedSize.Width = int.MaxValue; }                    if (proposedSize.Height < 10) { proposedSize.Height = int.MaxValue; }                    int reservedWidth = Padding.Horizontal + (this.Icon == null ? 0 : (this.Icon.Width + IconSpace));                    Size wellSize = Size.Empty;                    if (!string.IsNullOrEmpty(this.Text))                    {                        //用指定宽度测量文本面积                        Size size = TextRenderer.MeasureText(this.Text, this.Font, new Size(proposedSize.Width - reservedWidth, 0), textFlags);                        int lineHeight = TextRenderer.MeasureText(" ", this.Font, new Size(int.MaxValue, 0), textFlags).Height;//单行高,Font.Height不靠谱                        wellSize = Convert.ToSingle(size.Width) / size.Height > PreferredScale //过于宽扁的情况                            ? Size.Ceiling(GetSameSizeWithNewScale(size, PreferredScale))                            : size;                        //凑齐整行高,确保尾行显示                        wellSize.Height = Convert.ToInt32(Math.Ceiling(wellSize.Height / Convert.ToDouble(lineHeight))) * lineHeight;                    }                    if (this.Icon != null)                    {                        wellSize.Width += this.Icon.Width + IconSpace;                        wellSize.Height = Math.Max(this.Icon.Height, wellSize.Height);                    }                    wellSize += Padding.Size;                    //不应超过指定尺寸。宽度在上面已确保不会超过                    if (wellSize.Height > proposedSize.Height) { wellSize.Height = proposedSize.Height; }                    return wellSize;                }                /// <summary>                /// 重绘                /// </summary>                protected override void OnPaint(PaintEventArgs e)                {                    Graphics g = e.Graphics;                    Rectangle rect = GetPaddedRectangle();                    //绘制图标                    if (this.Icon != null)                    {                        g.DrawIcon(this.Icon, Padding.Left, Padding.Top);                        //右移文本区                        rect.X += this.Icon.Width + IconSpace;                        rect.Width -= this.Icon.Width + IconSpace;                        //若文字太少,则与图标垂直居中                        if (this.Text.Length < 100)                        {                            Size textSize = TextRenderer.MeasureText(g, this.Text, this.Font, rect.Size, textFlags);                            if (textSize.Height <= this.Icon.Height)                            {                                rect.Y += (this.Icon.Height - textSize.Height) / 2;                            }                        }                    }                    //g.FillRectangle(Brushes.Gainsboro, rect);//test                    //绘制文本                    TextRenderer.DrawText(g, this.Text, this.Font, rect, Color.Black, textFlags);                    base.OnPaint(e);                }                /// <summary>                /// 根据原尺寸,得到相同面积、且指定比例的新尺寸                /// </summary>                /// <param name="src">原尺寸</param>                /// <param name="scale">新尺寸比例。需是width/height</param>                private static SizeF GetSameSizeWithNewScale(Size src, float scale)                {                    int sqr = src.Width * src.Height;//原面积                    double w = Math.Sqrt(sqr * scale);//新面积宽                    return new SizeF(Convert.ToSingle(w), Convert.ToSingle(sqr / w));                }                /// <summary>                /// 获取刨去Padding的内容区                /// </summary>                private Rectangle GetPaddedRectangle()                {                    Rectangle r = this.ClientRectangle;                    r.X += this.Padding.Left;                    r.Y += this.Padding.Top;                    r.Width -= this.Padding.Horizontal;                    r.Height -= this.Padding.Vertical;                    return r;                }            }            /// <summary>            /// 屏蔽全选消息的文本框            /// </summary>            private class TextBoxUnSelectAllable : TextBox            {                protected override void WndProc(ref Message m)                {                    //EM_SETSEL                    if (m.Msg == 0xB1) { return; }                    base.WndProc(ref m);                }            }            /// <summary>            /// 包装ToolBarButton为单一控件            /// </summary>            private class ToggleButton : Control            {                /// <summary>                /// 展开/收起图标数据                /// </summary>                const string ImgDataBase64 =@"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";                readonly bool isToggleMode;                bool isChecked;                bool useAnimate;                readonly ImageList imgList;                /// <summary>                /// Checked改变后                /// </summary>                public event EventHandler CheckedChanged;                /// <summary>                /// 使用动画按钮效果                /// </summary>                private bool UseAnimate                {                    get { return useAnimate; }                    set                    {                        if (useAnimate == value) { return; }                        useAnimate = value;                        if (IsHandleCreated) { this.CreateHandle(); }                    }                }                /// <summary>                /// 获取或设置按钮是否处于按下状态                /// </summary>                [Description("获取或设置按钮是否处于按下状态"), DefaultValue(false)]                public bool Checked                {                    get                    {                        if (IsHandleCreated)                        {                            //保证isChecked与实情吻合。TB_ISBUTTONCHECKED                            isChecked = Convert.ToBoolean(SendMessage(this.Handle, 0x40A, IntPtr.Zero, IntPtr.Zero).ToInt32());                        }                        return isChecked;                    }                    set                    {                        if (isChecked == value || !isToggleMode) { return; }                        isChecked = value;                        if (IsHandleCreated)                        {                            //TB_CHECKBUTTON                            SendMessage(this.Handle, 0x402, IntPtr.Zero, new IntPtr(Convert.ToInt32(value)));                        }                        OnCheckedChanged(EventArgs.Empty);                    }                }                /// <summary>                /// 创建ToolBarButtonControl                /// </summary>                public ToggleButton(bool useAnimate)                {                    SetStyle(ControlStyles.UserPaint, false);                    SetStyle(ControlStyles.AllPaintingInWmPaint, true);                    SetStyle(ControlStyles.OptimizedDoubleBuffer, true);                    SetStyle(ControlStyles.ResizeRedraw, true);                    this.isToggleMode = true;//写死好了,独立版才提供设置                    this.UseAnimate = useAnimate;                    //将图标加入imageList                    imgList = new ImageList { ImageSize = new System.Drawing.Size(16, 16), ColorDepth = ColorDepth.Depth32Bit };                    using (MemoryStream ms = new MemoryStream(Convert.FromBase64String(ImgDataBase64)))                    {                        imgList.Images.AddStrip(Image.FromStream(ms));                    }                }                /// <summary>                /// 执行左键单击                /// </summary>                public void PerformClick()                {                    SendMessage(this.Handle, 0x201, new IntPtr(0x1), IntPtr.Zero);//WM_LBUTTONDOWN                    Application.DoEvents();                    SendMessage(this.Handle, 0x202, IntPtr.Zero, IntPtr.Zero);    //WM_LBUTTONUP                }                protected override void WndProc(ref Message m)                {                    //忽略鼠标双击消息,WM_LBUTTONDBLCLK                    if (m.Msg == 0x203) { return; }                    //有节操的响应鼠标动作                    if ((m.Msg == 0x201 || m.Msg == 0x202) && (!this.Enabled || !this.Visible))                    {                        return;                    }                    base.WndProc(ref m);                }                //创建ToolBar                protected override CreateParams CreateParams                {                    get                    {                        CreateParams prms = base.CreateParams;                        prms.ClassName = "ToolbarWindow32";                        prms.Style = 0x40000000                            | 0x10000000                            //| 0x2000000 //WS_CLIPCHILDREN                            //| 0x8000                            | 0x1                            | 0x4                            | 0x8                            | 0x40                            | 0x1000 //TBSTYLE_LIST,图标文本横排                            ;                        if (UseAnimate) { prms.Style |= 0x800; }//TBSTYLE_FLAT。flat模式在NT6.x下,按钮按下会有动画效果                        prms.ExStyle = 0;                        return prms;                    }                }                protected override void OnHandleCreated(EventArgs e)                {                    base.OnHandleCreated(e);                    //设置imgList                    SendMessage(this.Handle, 0x430, IntPtr.Zero, imgList.Handle);//TB_SETIMAGELIST                    //准备添加按钮                    int btnStructSize = Marshal.SizeOf(typeof(TBBUTTON));                    SendMessage(this.Handle, 0x41E, new IntPtr(btnStructSize), IntPtr.Zero);//TB_BUTTONSTRUCTSIZE,必须在添加按钮前                    //构建按钮信息                    TBBUTTON btnStruct = new TBBUTTON                    {                        //iBitmap = 0,                        //idCommand = 0,                        fsState = 0x4, //TBSTATE_ENABLED                        iString = SendMessage(this.Handle, 0x44D, 0, this.Text + '\0')//TB_ADDSTRING                    };                    if (this.isToggleMode) { btnStruct.fsStyle = 0x2; }//BTNS_CHECK。作为切换按钮时                    IntPtr btnStructStart = IntPtr.Zero;                    try                    {                        btnStructStart = Marshal.AllocHGlobal(btnStructSize);//在非托管区创建一个指针                        Marshal.StructureToPtr(btnStruct, btnStructStart, true);//把结构体塞到上述指针                        //添加按钮                        SendMessage(this.Handle, 0x444, new IntPtr(1)/*按钮数量*/, btnStructStart);//TB_ADDBUTTONS。从指针取按钮信息                        //设置按钮尺寸刚好为ToolBar尺寸                        AdjustButtonSize();                    }                    finally                    {                        if (btnStructStart != IntPtr.Zero) { Marshal.FreeHGlobal(btnStructStart); }                    }                }                protected override bool ProcessCmdKey(ref Message m, Keys keyData)                {                    //将空格和回车作为鼠标单击处理                    if (m.Msg == 0x100 && (keyData == Keys.Enter || keyData == Keys.Space))                    {                        PerformClick();                        return true;                    }                    return base.ProcessCmdKey(ref m, keyData);                }                /// <summary>                /// 处理助记键                /// </summary>                protected override bool ProcessMnemonic(char charCode)                {                    if (IsMnemonic(charCode, this.Text))                    {                        PerformClick();                        return true;                    }                    return base.ProcessMnemonic(charCode);                }                protected override void OnClick(EventArgs e)                {                    //忽略鼠标右键                    MouseEventArgs me = e as MouseEventArgs;                    if (me != null && me.Button != System.Windows.Forms.MouseButtons.Left)                    { return; }                    //若是切换模式,直接引发Checked事件(不要通过设置Checked属性引发,因为OnClick发送之前就已经Check了)                    //存在理论上的不可靠,但暂无更好办法                    if (isToggleMode)                    { this.OnCheckedChanged(EventArgs.Empty); }                    base.OnClick(e);                }                //重绘后重设按钮尺寸                protected override void OnInvalidated(InvalidateEventArgs e)                {                    base.OnInvalidated(e);                    AdjustButtonSize();                }                /// <summary>                /// 引发CheckedChanged事件                /// </summary>                protected virtual void OnCheckedChanged(EventArgs e)                {                    SetImageIndex(this.Checked ? 1 : 0);                    if (CheckedChanged != null) { CheckedChanged(this, e); }                }                /// <summary>                /// 设置图标索引                /// </summary>                private void SetImageIndex(int index)                {                    //TB_CHANGEBITMAP                    SendMessage(this.Handle, 0x42B, IntPtr.Zero, new IntPtr(index));                }                /// <summary>                /// 调整按钮尺寸刚好为ToolBar尺寸                /// </summary>                private void AdjustButtonSize()                {                    IntPtr lParam = new IntPtr((this.Width & 0xFFFF) | (this.Height << 0x10)); //MakeLParam手法                    SendMessage(this.Handle, 0x41F, IntPtr.Zero, lParam); //TB_SETBUTTONSIZE                }                #region Win32 API                [DllImport("user32.dll", CharSet = CharSet.Auto)]                private static extern IntPtr SendMessage(IntPtr hWnd, int msg, IntPtr wParam, IntPtr lParam);                [DllImport("user32.dll", CharSet = CharSet.Auto)]                private static extern IntPtr SendMessage(IntPtr hWnd, int msg, int wParam, string lParam);                [StructLayout(LayoutKind.Sequential)]                private struct TBBUTTON                {                    public int iBitmap;                    public int idCommand;                    public byte fsState;                    public byte fsStyle;                    public byte bReserved0;                    public byte bReserved1;                    public IntPtr dwData;                    public IntPtr iString;                }                #endregion            }            #endregion        }    }}
MessageBoxEx.cs

实现说明:

以下内容献给爱“八卦”和蛋疼的童鞋。这里先贴个概要类图,详细的后面有完整Demo下载,你可以down回去慢慢研究。

  • 若干Show方法都是调用私有的ShowCore方法,这个是模仿标准MessageBox的命名。至于意义,是因为公开方法要做参数检查,检查合格后的代码则可以重用。另外,几个存在参数检查的方法都是调用内部方法,而不是调参数最全的那个重载,也是因为要尽量避免无谓的参数检查,因为参数最全的那个公开方法,参数检查自然是做的最多的,那么少参方法本来已经能确保传入的是合法参数,却因为调它,就会造成无谓的检查,而调内部方法则可以避免,因为内部方法就应该设计为不做或少做参数检查的。啰嗦这个是想提醒初学者注意这些细节上的处理,性能要从细处抓起
  • 静态类MessageBoxEx内部维护着一个MessageForm窗体类(下文简称MsgFm),每次Show都会实例化一个MsgFm,show完即释放。几乎所有能力都是由后者提供,前者只是简单的对其封装和暴露,所以下面主要说MsgFm的事。另外,根据传入的MessageBoxButtons有无Cancel项,会启用/屏蔽窗体右上角的关闭按钮,因为单击关闭按钮的对话框结果始终是DialogResult.Cancel,所以如果不屏蔽,在传入YesNo这样的参数时候,调用者可能因为用户去点关闭按钮而得到Yes、No以外的结果。标准消息框也是有这样的屏蔽处理的
  • MsgFm由3个控件区构成,分别是主消息区、按钮区、详细信息区
    • 主消息区是一个单一控件:MessageViewer,直接继承自Control写成。一开始是考虑用现成的Label控件,但发现后者的图文混排效果差强人意(不要扯这个成语本来的意思),它是把文字直接盖在图标上,呵呵,大概此控件的编写者本意就是要把Image当BackgroundImage用,所以不得已另写一个MessageViewer。MV主要做了两个事,绘制(图标和文本)+根据内容确定自身尺寸,另外它还控制了最小高度,避免图标和文本整体被淹没
    • 按钮区由一个容器类控件PanelBasic托起4个按钮。PB同样是继承自Control,没有直接选用Panel的原因,主要是Panel会在设置Dock时跳一下,根源在Control.SetBoundsCore的specified参数通知了无谓的信息,所以干脆直接继承Control重写该方法,顺便处理一下消息,解决瞬闪的问题,具体原因这里不细说,注释里有简短说明,总之相信我不是蛋疼就行了。此外按钮区会根据按钮可见情况控制最小宽度,它与上面的MessageViewer的最小高度共同构成了整个对话框的最小尺寸MinimumSize
    • PanelBasic上的4个按钮分别是【详细信息】按钮和其它3个对话框命令按钮。仨按钮根据传入的MessageBoxButtons参数动态处理(按钮文本、是否可见等),没什么好说的。【详细信息】按钮(ToggleButton)则费了番功夫,该按钮从外观上就可以看出不是标准的Button,事实上它是个工具栏按钮:ToolBarButton,属于ToolBar上的Item,本身不是独立的控件(直接继承自Component)。这里扯一点,由于.net 2.0起MS就建议用新式的ToolStrip代替ToolBar,类似的还有MenuStrip代替MainMenu、StatusStrip代替StatusBar、ContextMenuStrip代替ContextMenu,VS2010更是默认就不在工具箱显示这些“控件”(有些不算控件),所以估计知道的新童鞋不多。后者都是原生的win32组件,前者则是纯.net实现的,有Office2003的控件风格。总之对于有win32 native控的我来说,对这些被建议替代的老式控件有特别的情结。所以这个ToggleButton实际上是由一个ToolBar和一个ToolBarButton组成的看起来像一个单一控件的东西,那为什么它还是继承自Control而不是直接用ToolBar呢,我承认这里面有练手的原因(迟些我可能会写一篇【教你一步步封装一个Win32原生控件】的文章),Hmmm~也就这个原因了,但它虽然增加了代码量,但请务必相信性能不比直接用ToolBar差,理论上还要好过,因为作为一个完备的ToolBar,MS要考虑的情况相当多,显然处理也少不了,而我这个ToggleButton由于只负责一个单一按钮的功能,所以其实很Simple很Lite~聪明的你会理解的。最后为什么要费事弄成ToolBarButton而不是直接用一个Button,是因为我看上了mstsc.exe的这个效果:

      顺便说一点,EnableAnimate属性有作用到该按钮,原理是当ToolBar具有Flat样式的时候,按钮按下和弹起就有动画效果,否则没有
    • 最后是详细信息区,由一个PanelBasic托起一个简单改造过的TextBox构成。干嘛不单纯用一个TextBox,而要在它底下垫一层呢,是因为在XP上的效果不好(控件狗要考虑的情况很多了啦好不好),XP窗口边框不如NT6粗,不加点衬料的话太单薄。话说回来,PanelBasic上面已说过,而所谓改造过的这个TextBox叫TextBoxUnSelectAllable,就干一件事,忽略全选消息(EM_SETSEL),避免焦点移进去的时候蓝莹莹一大片吓到观众。而为什么不用标准TextBox的Enter事件取消全选,一个字~太low
  • 尚存在一个问题,这个注释里也有坦白,就是当主消息文本非常非常多时~大概整屏那么长(这其实是不正确的使用姿势,上面说过,大量信息应该放详细信息区),如果对对话框反复拖拉、展开/收起,那么在某次展开时,TextBoxUnSelectAllable会瞬间在主消息区闪一下,这个问题在PanelBasic得到了完美的解决,但TextBox实在无能为力,尝试过直接用原生Edit控件也如此,所以暂时留着吧,哪有没缺憾的人生呢
  • 至于消息框的声音,NT6上的标准消息框原本就是没有声音的,所以照常用MessageBeep API,无声就无声,也无不可,但我考虑即便是尽量靠向原生,也不代表啥都要照搬,取其精华弃其糟泊才是正道,所以用了PlaySound API,让消息声回到NT6的世界,同时XP表现不变~人家原本就有声音
  • 最后,【详细信息】按钮上那俩图标(展开、收起各一个)是我画的,本来想拣mstsc.exe上的,但发现效果不如意,还不如自己画

说了这么多,自以为很理想的实现,可能槽点也不少,再次恳请路过大侠指点,谢谢。

最后,Demo在此,里面有个Tester供你体验:

-文毕-

6楼visonme
确实如1楼说的,目前如果说窗体类工程开发用wf的相对比较少见了,而取而代之的wpf相比会多见点,不过用的还是有的,而且有些wf的旧工程基本也要继续延续下去wf
5楼KMSFan
好像现在用winform的人都不多了
Re: 林选臣
@KMSFan,引用好像现在用winform的人都不多了,winform作为windows的基础,会用得不多吗?昨天装了个Win10体验了下,虽然增加了大量的Universal App,但是诸如记事本、计算器、Windows Media Player等等传统的Win32应用依然存在,所以想一时间取代Windows传统的窗体应用是明显不可能的。
4楼ahdung
好像是,但不妨碍我继续用^_^
3楼harrell
还在用Winform帮顶
2楼E024
下载下来体验了一下,效果很不错,但有个问题不知楼主知道不,在ckbToggle还没有展开的时候猛点猛点,然后展开就很长很长了。
Re: ahdung
@E024,我明白你说的了,ToggleButton是按LBUTTONDOWN和LBUTTONUP识别Click,没有处理双击情况,我研究下如何避免。谢谢反馈!
Re: ahdung
@E024,问题已解决,文章有更新,再次谢谢。
1楼Nicol
我在用winform
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