RadAsyncUpload JScript error

[Jeff Kershner]

I am using VS2010, RadControls for ASP.NET AJAX Q2 2010 with ASP.NET 4.0.

I have the following on my page:
<telerik:RadAsyncUpload ID="RadAsyncUpload1" runat="server" OnClientFileSelected="onFileSelected" OnClientFileUploaded="onFileUploaded" ReadOnlyFileInputs="true">
</telerik:RadAsyncUpload>

When I load my page, I get an error in IE8 in this function:
 
function __flash__addCallback(instance, name) {
instance[name] =  function () { return eval(instance.CallFunction("<invoke name=\""+name+"\" returntype=\"javascript\">" + __flash__argumentsToXML(arguments,0) + "</invoke>"));
}
}

The Call Function is is try to load is this:
<invoke name="setFileFilters" returntype="javascript"><arguments><array></array><false/></arguments></invoke>

I have tried using the latest internal builds as well as this version and it is the same.

What might be the problem?

[Yana]

Hi Jeff,

I'm not able to reproduce this issue at our side. Could you please send us a runnable page demonstrating the problem? Thanks

Best wishes,
Yana
the Telerik team

[Jeff Kershner]

It looks like the problem is when I have a Rad Async Upload control in a Panel with a Ajax Control Toolkit RoundCornersExtender applied to it.

<

 

 

asp:RoundedCornersExtender ID="RoundedCornersExtender1" TargetControlID="AddPanel" runat="server" Radius="4" BorderColor="Black" Corners="All">

 

</

 

 

asp:RoundedCornersExtender>

When I remove the this extender, everything works correctly.

Thanks,
--Jeff

 

[Yana]

Hello Jeff,

Is this panel initially invisible? I'm asking because we have logged similar issue recently.

Best regards,
Yana
the Telerik team

[Daniel Gioulakis]

We're experiencing this issue as well.  The panel containing the RadAsyncUploader is initially NOT visible.

Our application then breaks throwing the error:

Invalid postback or callback argument. Event validation is enabled using

[Yana]

Hello Daniel,

Could you please download the latest internal build and try with it? Let us know the result.

Best wishes,
Yana
the Telerik team

[Dang]

I'm getting exactly the same error as the op.

This only started when I upgraded to the latest version. Before it was working fine (version 2010.1.519).

My upload is also initially not visible.

Any updates on what the issue could be?

[Dang]

Just worked out the issue.
New version uses flash which may cause upload to break in IE. 

Disabled the flash and everything is happy again...

RadAsyncUpload.Modules.Flash.isAvailable = function() { return false; };

[Daniel Gioulakis]

Seemed to fix it on our end. Your help is much appreciated. Thanks!