title: checkbox inside a gridview within updatepanel
body: <p>I have a <code>gridview</code> with a <code>checkbox</code> in first column. I set <code>checkbox</code> property of <code>autopostback="true"</code>. The <code>gridview</code> is inside the <code>updatepanel</code>. When <code>checkbox</code> is <code>checked</code> i want to make one <code>panel</code> as visible, which panel is outside the update panel. I check the code with check point, which is go through the code, but its not working. Can any one help me?..  </p>
  
  <p>Thanks in advance.</p>
  
  <p>My code is here for your reference...  </p>
  
  <p>HTML Code:</p>
  
  <pre><code>&lt;asp:Panel ID="ploperation" runat="server" CssClass="plop" Visible="False"&gt;
      &lt;asp:LinkButton ID="lbtnasspam" runat="server" CssClass="panelbtn" Font-Names="Calibri"
                      Font-Size="14px" Font-Underline="False" OnClick="lbtnasspam_Click"&gt;Report As Spam&lt;/asp:LinkButton&gt;
  &lt;/asp:Panel&gt;
  
   &lt;asp:UpdatePanel ID="up" runat="server"&gt;
       &lt;ContentTemplate&gt;
           &lt;asp:GridView ID="gvmail" runat="server" AllowPaging="True" AutoGenerateColumns="False"&gt;
  
                &lt;Columns&gt;
                    &lt;asp:TemplateField&gt;
                        &lt;ItemTemplate&gt;
                            &lt;asp:CheckBox ID="chkchild" runat="server" AutoPostBack="true" OnCheckedChanged="chkchild_CheckedChanged"/&gt;
                        &lt;/ItemTemplate&gt;
                        &lt;ItemStyle Width="15px" /&gt;
                    &lt;/asp:TemplateField&gt;
                &lt;/Columns&gt;         
           &lt;/asp:GridView&gt;
       &lt;/ContentTemplate&gt;                        
  &lt;/asp:UpdatePanel&gt;
  </code></pre>
  
  <p>C# Code:</p>
  
  <pre><code>protected void chkchild_CheckedChanged(object sender, EventArgs e)
  {
      ploperation.Visible = true;
  }
  </code></pre>