javascript - showModalDialog not returning value in Chrome

Question

I made a small calendar popup in Javascript. Very simple, using the Calendar control from ASP.NET. I call the popup window with showModalDialog. In the modal window, changin

Answer 1

I had this same error, what i found in some forum is that if you put your controls in a updatePanel and ContentTemplate it will work:

 <asp:UpdatePanel ID="UpdatePanel1" runat="server">
           <ContentTemplate>
           </ContentTemplate>
 </asp:UpdatePanel>

Answer 2

In order to keep using showModalDialog in my page, I had to come up with my own workaround for the bug. So, here it is...

In Google Chrome, after a postback, showModalDialog always returns undefined. However, the window.opener property in the modal dialog points to the caller window, even after postbacks. So, I thought about putting the result of the dialog in the returnValue property of that caller window. And it works.

In the caller window:

var prevReturnValue = window.returnValue; // Save the current returnValue
window.returnValue = undefined;
var dlgReturnValue = window.showModalDialog(...);
if (dlgReturnValue == undefined) // We don't know here if undefined is the real result...
{
    // So we take no chance, in case this is the Google Chrome bug
    dlgReturnValue = window.returnValue;
}
window.returnValue = prevReturnValue; // Restore the original returnValue

At this point, use dlgReturnValue for further processing

In the modal dialog window:

if (window.opener)
{
    window.opener.returnValue = dateValue;
}
window.returnValue = dateValue;
self.close();