为GridView加入全选

在Gridview中加入下列模板:

<asp:TemplateField HeaderText="全选">
        <HeaderTemplate>
                <asp:CheckBox ID="checkall" runat="server" Text="全选"
                        AutoPostBack="true" OnCheckedChanged="checkAll" />
         </HeaderTemplate>
          <ItemTemplate>
                   <asp:CheckBox ID="check" runat="server" Text="选择" />
            </ItemTemplate>    
</asp:TemplateField>

在CS文件中加入下列方法:

   protected void checkAll(object sender, EventArgs e)
  {
       CheckBox cb = (CheckBox) sender;
       if (cb.Text == "全选")
       {
           foreach (GridViewRow gvr in gvLessons.Rows)
           {
               CheckBox cb1 = (CheckBox)gvr.FindControl("check");
               cb1.Checked = cb.Checked;
           }
       }
    }