Clipboard_AccessNotAllowed error in Silverlight 4

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Hi,

I am working with Silverlight 4.0 and I have used Clipboard(System.Windows) class for copying error from the site.

It is working fine in my machine but when I am trying to access it from Others machine, I am getting follwing Error :

"

[Clipboard_AccessNotAllowed]<br />
Arguments:<br />
Debugging resource strings are unavailable. Often the key and arguments provide sufficient information to diagnose the problem. See http://go.microsoft.com/fwlink/?linkid=106663&Version=4.0.60310.0&File=System.Windows.dll&Key=Clipboard_AccessNotAllowed"

My code is as below :

private void SetMessageToClipboard(string sMessage)
        {
            try
            {
                Clipboard.SetText(sMessage);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

This error will be disappeared once you select 'Remember my answer' in popup of Silverlight.

Is it related to ClientPolicy.XML file? I have not added it. But I have not found anything in ClientPolicy.XML which can be helpful for me.

Please suggest.

Posted 11-Jul-11 23:55pm

PankilSyn_2011

Updated 22-Jul-18 4:30am

Tarun.K.S

v3

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Christian Graus · Answer 1 · 2011-07-11T23:56:00

Solution 1

I doubt you can access the clipboard when your code is not running locally. Copying the clients clipboard is surely a potentially hostile behaviour ?

Posted 11-Jul-11 23:56pm

Christian Graus

Abhinav S · Answer 2 · 2011-07-11T23:59:00

Solution 2

Silverlight 4 has support to the Clipboard. You need to do this via a user initialized action.
See here[^].

Posted 11-Jul-11 23:59pm

Abhinav S

Comments

PankilSyn_2011 12-Jul-11 6:01am

Hi Abhinav,

I have already added this Clipborad but while I am accessing it from other's machine, It is giving mentioned error.

Pete O'Hanlon 12-Jul-11 6:23am

This is a security feature and not one you can disable. Basically, you have to force the user to choose to let your program access the clipboard, so that they can make an informed choice rather than your code just changing things behind the scenes.

PankilSyn_2011 12-Jul-11 6:38am

Hi Pete,

Thanks for the comment. While we are trying to access the Clipboard, Silverlight will ask the permission from User.

After User has selected 'No' means 'Don't allow to access Clipbord' in Silverlight popup, I am getting this error.

Regards,Pankil Patel

Pete O'Hanlon 12-Jul-11 8:49am

That's exactly what I'd expect. The user has denied access to the clipboard, so your application has to respect that - this is enforced by the runtime.

PankilSyn_2011 12-Jul-11 9:05am

Hi Pete,

Yes. User has denied the access to the clipboard. But normally it gives proper exception like 'Clipboard is not allowed' and in rare case (5%) it gives error which I have mentioned in the question.

I did not find any related topics in microsoft site or even from Google :(.

Regards,
Pankil Patel

A.Bhati · Answer 3 · 2014-05-27T18:12:00

Its rather very simple:

Go to Start-> All Programs->Microsoft Silverlight-> Microsoft Silverlight(Click it)
This will open Silverlight for you.

Now go to Permissions Tab. You will See clipboard here with permission as Deny.
Click Allow -> Click OK.

Restart your Application and now your Silverlight application should have access to clipboard.

Enjoy Coding,
Ajay

Member 13921567 · Answer 4 · 2018-07-22T04:31:00

Solution 4

Right click on blank area -> silverlight -> permissions -> allow clipboard

Posted 22-Jul-18 4:31am

Member 13921567

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Graeme_Grant 22-Jul-18 10:40am

This is a 7-year-old question on a discontinued framework. Please answer questions that are current...

Clipboard_AccessNotAllowed error in Silverlight 4

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