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    <AjaxToolkit:tabpanel runat="server" id="nourl" headertext=" " width="90%" height="100px" visible="false" >
    <headertemplate>  
                New 
            </headertemplate>  
            <contenttemplate >  
            <table border="0" cellpadding="0" cellspacing="0" width="100%">
               <tr>
                <td align="center"  valign="middle">                        
                </td>
            </tr>
        </table>

            </contenttemplate>  
    </AjaxToolkit:TabPanel>

        </ajaxtoolkit:tabcontainer>

这是aspx文件代码

在服务器端，我将此选项卡面板设置为可见真，然后我在另一个按钮事件中设置可见假，它不会隐藏选项卡面板。如何解决这个问题呢

try
{
   DataTable dtFeedurls = getDatatable();

   if (dtFeedurls.Rows.Count > 0)
   {
     foreach (DataRow dr in dtFeedurls.Rows)
      {
         AjaxControlToolkit.TabPanel tb = new AjaxControlToolkit.TabPanel();
         tb.ID = ("Tab" + dr["COLUMN_1"].ToString());
         tb.HeaderText  = dr["COLUMN_2"].ToString();
         tc.Tabs.Add(tb);

     }

    nourl.Visible = false;

   }
   else
   {
     nourl.Visible = true;                
   }

   tc.ActiveTabIndex = 0;
}
catch (Exception ex)
 {
   throw ex;
 }

这是服务器端代码

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