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经常看到论坛上有人问在DataGrid中如何实现单选，下面就是一种实现的方法。
查看例子
<![CDATA[
<%@ Page Language="C#" AutoEventWireup="True" EnableViewState = "true"%>
<%@ Import Namespace="System.Data" %>
<html>
<script runat="server">
DataTable Cart;
DataView CartView;
ICollection CreateDataSource()
{
DataTable dt = new DataTable();
DataRow dr;
dt.Columns.Add(new DataColumn("IntegerValue", typeof(Int32)));
dt.Columns.Add(new DataColumn("StringValue", typeof(string)));
dt.Columns.Add(new DataColumn("CurrencyValue", typeof(double)));
for (int i = 0; i < 101; i++)
{
dr = dt.NewRow();
dr[0] = i;
dr[1] = "Item " + i.ToString();
dr[2] = 1.23 * (i+1);
dt.Rows.Add(dr);
}
DataView dv = new DataView(dt);
return dv;
}
void Page_Load(Object sender, EventArgs e)
{
string js = "";
js+="<script>\r\n";
js+="function ld(){\r\n";
js+="for(i=0;i<document.getElementsByName('RadioName').length;i++)\r\n";
js+="if(document.getElementsByName('RadioName')[i].value==";
js+="document.getElementById('" + rd.ClientID + "').value) ";
js+="document.getElementsByName('RadioName')[i].checked=true\r\n";
js+="}\r\n";
js+="window.onload=ld\r\n";
js+="</"+"script>\r\n";
this.RegisterStartupScript("js",js);
if (!IsPostBack)
{
ItemsGrid.DataSource = CreateDataSource();
ItemsGrid.DataBind();
}
}
void Grid_Change(Object sender, DataGridPageChangedEventArgs e)
{
ItemsGrid.CurrentPageIndex = e.NewPageIndex;
ItemsGrid.DataSource = CreateDataSource();
ItemsGrid.DataBind();
}
void btnClick(Object sender, EventArgs e)
{
if(Request.Form["RadioName"] != null)
{
rd.Value = Request.Form["RadioName"].ToString();
Label1.Text = "您所选择的是：<font color=red>" + Request.Form["RadioName"].ToString() +"</font>";
}
}
</script>
<body>
<form runat="server" id=MM>
<input type="hidden" id=rd runat=server/>
<asp:DataGrid id="ItemsGrid" runat="server"
BorderColor="black" BorderWidth="1"
CellPadding="3" AllowPaging="true"
AutoGenerateColumns="false"
OnPageIndexChanged="Grid_Change">
<HeaderStyle BackColor="#00aaaa"></HeaderStyle>
<PagerStyle Mode="NumericPages"></PagerStyle>
<Columns>
<asp:TemplateColumn>
<ItemTemplate>
<input type=radio name="RadioName" value='<%# DataBinder.Eval(Container.DataItem, "IntegerValue")%>'/>
</ItemTemplate>
</asp:TemplateColumn>
<asp:BoundColumn HeaderText="数字列" DataField="IntegerValue"/>
<asp:BoundColumn HeaderText="字符串列" DataField="StringValue"/>
<asp:BoundColumn HeaderText="货币列" DataField="CurrencyValue" DataFormatString="{0:c}">
<ItemStyle HorizontalAlign="right"></ItemStyle>
</asp:BoundColumn>
</Columns>
</asp:DataGrid>
<br>
<asp:Button id="Btn" Text="看你选择的" OnClick="btnClick" runat="server"/>
<asp:Label id="Label1" Text="" runat="server"/>
</form>
</body>
</html>
]]>
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