1 <asp:datagrid id="DataGrid1" runat="server" 
 2 //1、我们将datagrid的第一列设置为模板列，并加入RadioButtonList 
 3 AutoGenerateColumns="False">
 4 <Columns>                      <asp:TemplateColumn>
 5     <ItemTemplate>                    <asp:RadioButtonList ID="RadioButtonList1" Runat="server"></asp:RadioButtonList>
 6      </ItemTemplate>
 7   </asp:TemplateColumn>                <asp:BoundColumn DataField="CustomerID" HeaderText="CustomerID"></asp:BoundColumn>
 8 </Columns>
 9 </asp:datagrid>
10 //然后在数据绑定到DataGrid后，即DataGrid1.DataBind();代码之后，写：
11 //将第一列第一单元格的RowSpan设置为DataGrid的总列数
12 DataGrid.Items[0].Cells[0].RowSpan=DataGrid.Items.Count;  
13 for (int i=1;i<DataGrid.Items.Count;++i)
14 {              DataGrid.Items[i].Cells[0].Visible=false;  
15 //从第二列开始隐藏第一个单元格
16 }
17 //将第一列第一个单元格里的RadioButtonList按照DataGrid的总列数进行列添加
18 for (int i=0;i<DataGrid.Items.Count;++i)
19 {
20 ListItem li=new ListItem("","1");
21 ((RadioButtonList)DataGrid1.Items[0].Cells[0].Controls[1]).Items.Add(li);
22 }
23 而确定哪项被选中，可通过 DataGrid1.DataKeys[((RadioButtonList)DataGrid1.Items[0].Cells[0].Controls[1]).SelectedIndex] 
24 得到。

1 <input id="countriesGrid__ctl2_selectRadioButton"  type="radio" name="countriesGrid:_ctl2:country" value="selectRadioButton" />

  1 using System;
  2 using System.Web.UI;
  3 using System.Web.UI.WebControls;
  4 using System.Globalization;
  5 
  6 namespace Renyu.Web.UI.WebControls
  7 {
  8     [ToolboxData("<{0}:GroupRadioButton runat=server></{0}:GroupRadioButton>")]
  9     public class GroupRadioButton : RadioButton, IPostBackDataHandler
 10     {
 11         public GroupRadioButton() : base()
 12         {
 13         }
 14 
 15         #region Properties
 16 
 17         private string Value
 18         {
 19             get
 20             {
 21                 string val = Attributes["value"];
 22                 if(val == null)
 23                     val = UniqueID;
 24                 else
 25                     val = UniqueID + "_" + val;
 26                 return val;
 27             }
 28         }
 29 
 30         #endregion
 31         
 32         #region Rendering
 33 
 34         protected override void Render(HtmlTextWriter output)
 35         {
 36             RenderInputTag(output);
 37         }
 38 
 39         private void RenderInputTag(HtmlTextWriter htw)
 40         {
 41             htw.AddAttribute(HtmlTextWriterAttribute.Id, ClientID);
 42             htw.AddAttribute(HtmlTextWriterAttribute.Type, "radio");
 43             htw.AddAttribute(HtmlTextWriterAttribute.Name, GroupName);
 44             htw.AddAttribute(HtmlTextWriterAttribute.Value, Value);
 45             if(Checked)
 46                 htw.AddAttribute(HtmlTextWriterAttribute.Checked, "checked");
 47             if(!Enabled)
 48                 htw.AddAttribute(HtmlTextWriterAttribute.Disabled, "disabled");
 49             
 50             string onClick = Attributes["onclick"];
 51             if(AutoPostBack)
 52             {
 53                 if(onClick != null)
 54                     onClick = String.Empty;
 55                 onClick += Page.GetPostBackClientEvent(this, String.Empty);
 56                 htw.AddAttribute(HtmlTextWriterAttribute.Onclick, onClick);
 57                 htw.AddAttribute("language", "javascript");
 58             }
 59             else
 60             {
 61                 if(onClick != null)
 62                     htw.AddAttribute(HtmlTextWriterAttribute.Onclick, onClick);
 63             }
 64 
 65             if(AccessKey.Length > 0)
 66                 htw.AddAttribute(HtmlTextWriterAttribute.Accesskey, AccessKey);
 67             if(TabIndex != 0)
 68                 htw.AddAttribute(HtmlTextWriterAttribute.Tabindex, 
 69                     TabIndex.ToString(NumberFormatInfo.InvariantInfo));
 70             htw.RenderBeginTag(HtmlTextWriterTag.Input);
 71             htw.RenderEndTag();
 72         }
 73 
 74         #endregion
 75 
 76         #region IPostBackDataHandler Members
 77 
 78         void IPostBackDataHandler.RaisePostDataChangedEvent()
 79         {
 80             OnCheckedChanged(EventArgs.Empty);
 81         }
 82 
 83         bool IPostBackDataHandler.LoadPostData(string postDataKey, 
 84             System.Collections.Specialized.NameValueCollection postCollection)
 85         {
 86             bool result = false;
 87             string value = postCollection[GroupName];
 88             if((value != null) && (value == Value))
 89             {
 90                 if(!Checked)
 91                 {
 92                     Checked = true;
 93                     result = true;
 94                 }
 95             }
 96             else
 97             {
 98                 if(Checked)
 99                     Checked = false;
100             }
101             return result;
102         }
103 
104         #endregion
105     }
106 }
107