求助各位，这个怎么解决，过几天就要交付了
页面报错：
名为“Admin_ID”的列已属于此 DataTable。
说明: 执行当前 Web 请求期间，出现未处理的异常。请检查堆栈跟踪信息，以了解有关该错误以及代码中导致错误的出处的详细信息。
异常详细信息: System.Data.DuplicateNameException: 名为“Admin_ID”的列已属于此 DataTable。
源错误:
行 41: SqlDataReader dr = admin.GetAdmins();
行 42:
行 43: DataTable dt = SQLHelper.ConvertDrToDt(dr);
行 44: dt.Columns.Add("Admin_ID");//
行 45: dt.Columns.Add("AdminName");//
源文件: H:\NEWS_CHANEL\Backup\NEWS_CHANEL\Admin\AdminList.aspx.cs 行: 43
堆栈跟踪:
[DuplicateNameException: 名为“Admin_ID”的列已属于此 DataTable。]
System.Data.DataColumnCollection.RegisterColumnName(String name, DataColumn column, DataTable table) +4841153
System.Data.DataColumnCollection.BaseAdd(DataColumn column) +93
System.Data.DataColumnCollection.AddAt(Int32 index, DataColumn column) +78
System.Data.DataColumnCollection.Add(String columnName) +41
NEWS_CHANEL.Admin.AdminList.data() in H:\NEWS_CHANEL\Backup\NEWS_CHANEL\Admin\AdminList.aspx.cs:43
NEWS_CHANEL.Admin.AdminList.Page_Load(Object sender, EventArgs e) in H:\NEWS_CHANEL\Backup\NEWS_CHANEL\Admin\AdminList.aspx.cs:25
System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +14
System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +35
System.Web.UI.Control.OnLoad(EventArgs e) +99
System.Web.UI.Control.LoadRecursive() +50
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +627
后台页面：
- C# code
namespace NEWS_CHANEL.Admin{ public partial class AdminList : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { data(); PageControl.ResetGridView(this.GridView1); } } private void data() { BLL.SysAdmin admin = new BLL.SysAdmin(); SqlDataReader dr = admin.GetAdmins(); DataTable dt = SQLHelper.ConvertDrToDt(dr); dt.Columns.Add("Admin_ID"); dt.Columns.Add("AdminName"); dt.Columns.Add("Role_ID"); DAL.PageControl.GridViewDataBind(GridView1, dt); } }}SysAdmin类：
- C# code
namespace BLL{ public class SysAdmin { //定义管理员组数值 public static readonly int Superadmin = 0; public static readonly int Normaladmin = 1; public SqlDataReader GetAdmins() { SQLHelper sql = new SQLHelper(); SqlDataReader dr = null; //执行存储过程 try { sql.RunProc("Proc_Admins", out dr); } catch (Exception e) { throw e; } finally { } return dr; } }}PageControl类：
- C# code
namespace DAL{ public class PageControl { private static string EmptyText = "没有相关数据！"; //数据为空时，Gridview显示提示 public PageControl() { } /// <summary> /// 空数据时刷新页面正常显示表头 /// </summary> /// <param name="gridview">页面Gridview</param> public static void ResetGridView(GridView gridview) { //数据为空时，Gridview的构造 if(gridview.Rows.Count == 1 && gridview.Rows[0].Cells[0].Text == EmptyText) { int countnum = gridview.Columns.Count; gridview.Rows[0].Cells.Clear(); gridview.Rows[0].Cells.Add(new TableCell()); gridview.Rows[0].Cells[0].ColumnSpan = countnum; gridview.Rows[0].Cells[0].Text = EmptyText; gridview.Rows[0].Cells[0].Style.Add("text-align", "center"); } } /// <summary> /// Gridview绑定数据，为空时显示表头 /// </summary> /// <param name="gridview">页面Gridview</param> /// <param name="datatable">数据缓存DataTable</param> public static void GridViewDataBind(GridView gridview,DataTable datatable) { //数据为空时，Gridview的构造 if (datatable.Rows.Count == 0) { datatable = datatable.Clone(); datatable.Rows.Add(datatable.NewRow()); gridview.DataSource = datatable; gridview.DataBind(); int countnum = gridview.Columns.Count; gridview.Rows[0].Cells.Clear(); gridview.Rows[0].Cells.Add(new TableCell()); gridview.Rows[0].Cells[0].ColumnSpan = countnum; gridview.Rows[0].Cells[0].Text = EmptyText; gridview.Rows[0].Cells[0].Style.Add("text-align", "center"); } else { //数据不为空，直接绑定 gridview.DataSource = datatable; gridview.DataBind(); } //取消行选择 gridview.SelectedIndex = -1; } }}