title: error:'GridView' must be placed inside a form tag with runat=server
body: <p>If i put it into form tag then it solved.but<code>gridview is disappeared</code>.now what i have to d?</p>
  
  <pre><code>&lt;form runat="server" id="f1"&gt;`&lt;asp:GridView ID="GridView1" runat="server" AllowPaging="True"&gt;           
          &lt;/asp:Gridview&gt;&lt;/form&gt;
  </code></pre>
  
  <p></p>
  
  <p>`</p>