以下是个生成验证码的代码.请问如果让生成出来的随机字符不规则的倾斜?????
- C# code
using System;using System.Collections;using System.Configuration;using System.Data;using System.Linq;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.HtmlControls;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using System.Xml.Linq;using System.Web.SessionState;using System.Drawing;using System.Drawing.Imaging; namespace FyCms.Web{ public partial class ImgCode : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { DrawCode(); } public void DrawCode() { int width = 65; int height = 25; //定义一个随机变量 Random rand = new Random(); //创建图象 Bitmap img = new Bitmap(width, height); //从图象上获取一个绘画图 Graphics g = Graphics.FromImage(img); try { //定义字体 Font font = new Font("Comic sans ms", 11, FontStyle.Bold); Font font = new Font(FontItems[fontIndex], 11, return FontStyle.Regular | FontStyle.Bold;); //定义黑色画笔 SolidBrush brush = new SolidBrush(Color.Black); //定义钢笔,绘制干扰线 Pen pen1 = new Pen(Color.Gray); Pen pen2 = new Pen(Color.Gray); //清除整个绘画图面并以指定颜色填充 g.Clear(ColorTranslator.FromHtml("#FFFFFF")); //定义文字的绘制矩形区域 Rectangle rect = new Rectangle(2, 2, width, height); //定义一个随机数用于绘制干扰线 //生成两条横向干扰线 for (int i = 0; i < 2; i++) { //Define Point1 Point p1 = new Point(0, rand.Next(height)); //Define Point2 Point p2 = new Point(width, rand.Next(height)); g.DrawLine(pen1, p1, p2); } //生成四条纵向干扰线 for (int i = 0; i < 4; i++) { //Define Point1 Point p1 = new Point(rand.Next(width), 0); //Define Point2 Point p2 = new Point(rand.Next(width), height); //DrawLine g.DrawLine(pen2, p1, p2); } string strsj = strRand(); g.DrawString(strsj, font, brush, rect); //输出图象 img.Save(Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg); Session["ImgCode"] = strsj.ToLower(); //return strRand().ToLower(); } catch (Exception error) { throw new Exception(error.Message); } finally { g.Dispose(); img.Dispose(); } } //产生随机数 public string strRand() { //验证码范围 char[] strCode = { '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z' }; string strRandomCode = ""; Random random = new Random(); if (Session["ImgCode"] == null) { for (int i = 0; i < 4; i++) { strRandomCode += strCode[random.Next(strCode.Length)]; } } else { strRandomCode += Session["ImgCode"]; } return strRandomCode; } }}------解决方案--------------------------------------------------------
不错,帮顶
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帮忙顶下，
那就多几个验证字母吧
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修改 Rectangle rect = new Rectangle(2, 2, width, height);
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实现乱倾斜可多定义几种字体如：
可在你的代码里加：
- C# code
//定义图片弯曲的角度int srseedangle = 45;//定义字体string[] srFonts ={ "Verdana", "Microsoft Sans Serif", "Comic Sans MS", "Arial", "宋体" };Random srRandom= new Random();Font srFont = new Font(srFonts[srRandom.Next(5)], srRandom.Next(12,20), FontStyle.Regular);//定义倾斜角度float srangle = srRandom.Next(-srseedangle, srseedangle);//定义坐标Point srPoint = new Point(16, 16);g.TranslateTransform(srPoint.X, srPoint.Y);g.RotateTransform(srangle);
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//定义倾斜角度
srRandom.Next(-srseedangle, srseedangle);
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Graphics有个RotateTransform方法
这个srangle数据就是这个方法的参数
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FillRectangle
http://www.cnblogs.com/ghostljj/archive/2007/10/09/917993
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- C# code
//具体代码就是这样，没有调试，可能有错误，你自己到vs里测试下public void DrawCode() { int width = 65; int height = 25; //定义一个随机变量 Random rand = new Random(); //定义图片弯曲的角度 int srseedangle = 45; //创建图象 Bitmap img = new Bitmap(width, height); //从图象上获取一个绘画图 Graphics g = Graphics.FromImage(img); try { //定义字体 Font font = new Font("Comic sans ms", 11, FontStyle.Bold); //字体数组 string[] srFonts ={ "Verdana", "Microsoft Sans Serif", "Comic Sans MS", "Arial", "宋体" }; //颜色数组 Color[] srColors ={ Color.Black,Color.Red,Color.DarkBlue,Color.Blue,Color.Orange,Color.Brown,Color.DarkCyan,Color.Purple}; Font font = new Font(FontItems[fontIndex], 11, return FontStyle.Regular | FontStyle.Bold;); //定义黑色画笔 SolidBrush brush = new SolidBrush(Color.Black); //定义钢笔,绘制干扰线 Pen pen1 = new Pen(Color.Gray); Pen pen2 = new Pen(Color.Gray); //清除整个绘画图面并以指定颜色填充 g.Clear(ColorTranslator.FromHtml("#FFFFFF")); //定义文字的绘制矩形区域 Rectangle rect = new Rectangle(2, 2, width, height); //定义一个随机数用于绘制干扰线 //生成两条横向干扰线 for (int i = 0; i < 2; i++) { //Define Point1 Point p1 = new Point(0, rand.Next(height)); //Define Point2 Point p2 = new Point(width, rand.Next(height)); g.DrawLine(pen1, p1, p2); } //生成四条纵向干扰线 for (int i = 0; i < 4; i++) { //Define Point1 Point p1 = new Point(rand.Next(width), 0); //Define Point2 Point p2 = new Point(rand.Next(width), height); //DrawLine g.DrawLine(pen2, p1, p2); } string strsj = strRand(); for(int i=0;i<strsj.length;i++) { //定义字体 参数分别为字体样式 字体大小 字体字形 Font srFont = new Font(srFonts[rand.Next(5)], rand.Next(12,20), FontStyle.Regular); //填充图形 Brush srBrush = new SolidBrush(srColors[rand.Next(7)]); //定义坐标 Point srPoint = new Point(16, 16); //定义倾斜角度 float srangle = rand.Next(-srseedangle, srseedangle); //倾斜 g.TranslateTransform(srPoint.X, srPoint.Y); g.RotateTransform(srangle); //填充字符 g.DrawString(strsj.Substring(i,1),srFont,srBrush,1,1,new StringFormat(StringFormatFlags.NoClip)); g.RotateTransform(-srangle); g.TranslateTransform(2,-srPoint.Y); //g.DrawString(strsj, font, brush, rect); } //输出图象 img.Save(Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg); Session["ImgCode"] = strsj.ToLower(); //return strRand().ToLower(); } catch (Exception error) { throw new Exception(error.Message); } finally { g.Dispose(); img.Dispose(); } }