IFRAME not updated in update panel

Question

Hi,

 

Please give me solution

 

On button click in update panel iframe not works its not display any data

 

 

 

 

this is my Iframe code

 

<div style="display: inline-block; border: solid 0px green; vertical-align: top;">

<asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional">

<ContentTemplate>

<iframe id="ifrm_RentPrint" style="width: 334%; height: 900px; border: 0; margin-top: -24px"></iframe>

</ContentTemplate>

</asp:UpdatePanel>

</div>