Get iframe id in source page

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Hi,
I have two pages, one is main page and another one is a common page. In the main page i have two more widgets and the widgets containing iframe with source of common page. all widgets having the same common page, when i click a button of iframe its went to common page code behind button click event. There I want the id of iframe, in which iframe initialized the button click in the common page.how can i get it? please help.

What I have tried:

main page:

<div>
    <iframe id="widget1" src="commonpage.aspx"></iframe>
</div>

<div>
<iframe id="widget2" src="commonpage.aspx"></iframe>
</div>

common page:

<form  runat="server">
  <div>
      <p>Test page</p>
      <asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="TestButton"></asp:Button>
  <div>
<form>

code behind:

protected void Button1_Click(object sender,EventArgs e)
{
           // here i want the iframe id. which one initiated the event
}

Posted 4-Aug-16 19:47pm

Member 11125335

Updated 4-Aug-16 20:49pm

v2

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Karthik_Mahalingam · Accepted Answer · 2016-08-04T20:49:00

Try this

In Common Page ASPX:
Write a javascript function to get the Iframe ID and store it in a hidden field as

JavaScript

function SetWidgetName() {
           document.getElementById('<%= hdnWidgetName.ID%>').value = window.frameElement.id
     }

ASP.NET

<asp:Button ID="Button1"  OnClientClick="SetWidgetName();" runat="server" OnClick="Button1_Click" Text="TestButton"></asp:Button>
<asp:HiddenField ID="hdnWidgetName" runat="server"  />

Code behind:

C#

protected void Button1_Click(object sender, EventArgs e)
      {
          string widgetName = hdnWidgetName.Value; // get the Iframe ID
      }