C# 是创新性的新式编程语言

				介绍:
				目前必须通过自定义控件来实现
				1.RoseGrid
				2.ViewState["SelectCond"]管理选择项的集合。
				3.使用了一个普通ButtonColumn(不要用第二层的选择Button列)
				4.使用：单击一次，再次单击取消。
				
				1.控件
				using System;
				using System.Drawing;
				using System.Web.UI;
				using System.Web.UI.WebControls;
				using System.IO;
				using System.Collections;
				using System.Data;
				
				namespace Movecont
				{
					/// 
					/// RoseGrid
					/// 作者：葛利峰
					/// 2005-3-29
					/// 具有扩展功能的DataGrid
					/// 
					public class RoseGrid : DataGrid
					{
						public class SuperGridColumnTemplate : ITemplate
						{
							public void InstantiateIn(Control container) 
							{
								CheckBox cb = new CheckBox();
								container.Controls.Add(cb);
							}
						}
						//构造函数
						public RoseGrid()
						{
							AutoGenerateColumns=false;//禁用自动生成列
							ViewState["RowSelectFilter"] = "";
							//设置事件处理
							Init += new EventHandler(OnInit);
							ItemCreated += new DataGridItemEventHandler(OnItemCreated);
						}
						//在创建项时激发
						public void OnItemCreated(Object sender, DataGridItemEventArgs e)
						{
							//得到一个新建的项
							ListItemType itemType = e.Item.ItemType;
				
							//被选择项的背景色
							if (itemType == ListItemType.Item || itemType == ListItemType.AlternatingItem) 
							{
								DataRowView drv = (DataRowView) e.Item.DataItem;
								if (drv != null && RowSelectFilter != "")
								{
									if ((bool) drv["RowSelectFilter"])
										e.Item.BackColor = SelectBackColor;
								}
							}
						}
						//初始控件时激发
						public void OnInit(Object sender, EventArgs e)
						{
							if (AllowMultiSelect)//多选择项
								AddSelectColumn();			
						}
						private void AddSelectColumn()
						{
							TemplateColumn tc = new TemplateColumn();
							tc.ItemStyle.BackColor = Color.SkyBlue;
							tc.ItemTemplate = new SuperGridColumnTemplate();
							Columns.AddAt(0, tc);
						}
						public bool AllowMultiSelect = false;//允许多项选择
						//属性:行选择过滤器 
						public String RowSelectFilter 
						{
							get { return(String)  ViewState["RowSelectFilter"]; }
							set { ViewState["RowSelectFilter"] = value; }
						}
						//属性:选择时背景色
						private Color m_SelectBackColor = Color.SkyBlue;
						public Color SelectBackColor 
						{
							get { return m_SelectBackColor; }			
							set { m_SelectBackColor = value;}
						}
						//属性:数据源
						public override object DataSource
						{
							get {return base.DataSource;}
							set 
							{
								base.DataSource = value;
				
								DataTable dt = null;
								if (DataSource is DataTable)
									dt = (DataTable) DataSource;
								else if (DataSource is DataView)
									dt = ((DataView)DataSource).Table;
						
								DataColumn dc;	
								try 
								{
									if (dt.Columns.Contains("RowSelectFilter"))
										dt.Columns["RowSelectFilter"].Expression = RowSelectFilter;
									else
									{
										dc = new DataColumn("RowSelectFilter", typeof(bool), RowSelectFilter);
										dt.Columns.Add(dc);
									}
								}
								catch {RowSelectFilter="";}
							}
						}
					}
				}
							
				2.页面
				
				
				
				
					
						WebForm5
						
						
						
						
					
					
						
							
								自定义DataGrid终极控件示例
																	runat="server" AutoGenerateColumns="False" SelectBackColor="SkyBlue">
									
										
										
										
										
									
								
						
					
				
				3.代码
				using System;
				using System.Collections;
				using System.ComponentModel;
				using System.Data;
				using System.Drawing;
				using System.Web;
				using System.Web.SessionState;
				using System.Web.UI;
				using System.Web.UI.WebControls;
				using System.Web.UI.HtmlControls;
				using System.Data.SqlClient;
				namespace Co_6
				{
					/// 
					/// WebForm5 的摘要说明。
					/// 
					public class WebForm5 : System.Web.UI.Page
					{
						protected Movecont.RoseGrid RoseGrid1;
						protected System.Web.UI.WebControls.Label Label1;
					
						private void Page_Load(object sender, System.EventArgs e)
						{
							if(!Page.IsPostBack)
							{				
								ViewState["SelectCond"]=(new ArrayList());
								Display();
							}
						}
						private void Display()
						{
							string strConn,strCmd;
							strConn="server=localhost;uid=sa;pwd=;database=Northwind";
							strCmd="Select * From employees";
							SqlDataAdapter oCMD=new SqlDataAdapter(strCmd,strConn);
							DataSet oDS=new DataSet();
							oCMD.Fill(oDS,"MyList");
							DataTable dt=oDS.Tables["MyList"];				
							RoseGrid1.DataSource=oDS.Tables["MyList"];
							RoseGrid1.DataBind();
							Session["MyDataSet"]=oDS;//保存数据集
							oDS.Dispose();
							oDS=null;
							oCMD.Dispose();
							oCMD=null;
						}
				
						#region Web 窗体设计器生成的代码
						override protected void OnInit(EventArgs e)
						{
							//
							// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
							//
							InitializeComponent();
							base.OnInit(e);
						}
						
						/// 
						/// 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。
						/// 
						private void InitializeComponent()
						{    
							this.RoseGrid1.ItemCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.RoseGrid1_ItemCommand);
							this.RoseGrid1.SelectedIndexChanged += new System.EventHandler(this.RoseGrid1_SelectedIndexChanged);
							this.Load += new System.EventHandler(this.Page_Load);
				
						}
						#endregion
				
						private void RoseGrid1_SelectedIndexChanged(object sender, System.EventArgs e)
						{
				
						}
						//最新状态显示
						private void UpdateView()
						{
							DataSet ds=(DataSet)Session["MyDataSet"];
							DataView dv=ds.Tables["MyList"].DefaultView;
							RoseGrid1.DataSource=dv;
							RoseGrid1.DataBind();
						}
				
						private void RoseGrid1_ItemCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
						{
							if(e.CommandName=="se")
							{
								RoseGrid1.RowSelectFilter=ManExp(e.Item.Cells[0].Text);
								UpdateView();
							}
						}
						//管理表达式集合(单击选择，再次单击取消)
						private string ManExp(string key)
						{
							
							ArrayList al=(ArrayList)ViewState["SelectCond"];
				
							int j=al.IndexOf(key);
							if(j!=-1)
							{
								al.RemoveAt(j);
								ViewState["SelectCond"]=al;
							}
							else
							{
								al.Add(key);
								ViewState["SelectCond"]=al;
							}
							string res="";
							if(al.Count>0)
								res="Employeeid="+al[0].ToString();
							for(int i=1;i							{
								res+=" or Employeeid="+al[i].ToString();
							}
							return res;
						}
				
						private void CheckBox1_CheckedChanged(object sender, System.EventArgs e)
						{
						}
					}
				}