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demo.aspxÒ³Ãæ
<!-- ÂÔ-->
<asp:GridView id="GvContent"  runat="server" >
<Columns>
     <asp:TemplateField>
        <HeaderTemplate>
            <input ID="ckbSelectAll" type="checkbox" onclick="selectAll()" />
        </HeaderTemplate>
        <ItemTemplate>
             <asp:CheckBox ID="ckbSelectItem" runat="server" />
             <input id="hihSelectId" type="hidden" runat="server" value='<%# Eval("´Ë´¦ÎªÊý¾ÝÔ´ÖÐÖ÷¼ü") %>' />
         </ItemTemplate>
      </asp:TemplateField>
</Columns>
</asp:GridView>
<asp:button id="btnDel" runat="server" onclick="btnDel_Click" />
<!-- ÂÔ-->
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<script type="text/javascript">
function selectAll
{
  var ckbSelectAll = document.getElementById('ckbSelectAll');
  var ckbItemList = document.getElementsByTagName('input');
  for(i=0;i<ckbItemList.length;i++)
  {
       if(ckbItemList[i].type == 'checkbox'   && ckbItemList[i].name.indexOf('ckbSelectItem')>=0  )
       {
           ckbItemList[i].checked = ckbSelectAll.checked;
       }
  }