Occasional "System.Exception: OpenClipboard Failed (Exception from HRESULT: 0x800401D0)"

Hong 1,186

An app occasionally throws the following exception:

System.Exception: OpenClipboard Failed (Exception from HRESULT: 0x800401D0)
 Stack Trace:
   at System.Runtime.InteropServices.McgMarshal.ThrowOnExternalCallFailed(Int32, RuntimeTypeHandle) + 0x21
   at __Interop.ComCallHelpers.Call(__ComObject, RuntimeTypeHandle, Int32, Void*) + 0xbe
   at __Interop.ForwardComStubs.Stub_9[TThis, TArg0](__ComObject, TArg0, Int32) + 0x5a
   at ClassLibraryUno.Utility.<>c__DisplayClass119_0.<CopyToClipboard>b__0() + 0x34
   at Windows.Foundation.DeferralCompletedHandler.Invoke() + 0x25
   at Camera_Alternative!<BaseAddress>+0x28dfd9c

DataPackage dp = new DataPackage();
dp.SetText(sText);
await dispatcher.RunAsync(
    CoreDispatcherPriority.Normal,
    () =>
    {
        Clipboard.SetContent(dp);
    });

Could anyone offer a tip on the possible cause?

David Lowndes 2,455 Reputation points MVP

2024-06-13T09:04:27.41+00:00

The error code is "OpenClipboard Failed", so I guess that you need to catch that exception and act appropriately (for whatever your application is doing).
Hong 1,186 Reputation points

2024-06-13T09:16:13.4866667+00:00

The application tries to copy text to the clipboard. It usually works but throws this exception once in a while. I was wondering about the possible cause out of curiosity.

Is it possible that it is caused by some transient OS issue, hence the app should try again?
David Lowndes 2,455 Reputation points MVP

2024-06-13T13:02:01.18+00:00

Possibly some other program has access to the clipboard when your program tries to use it?
Yes, I'd try a small loop with a short delay between attempts.
Hong 1,186 Reputation points

2024-06-13T17:56:28.36+00:00

Thank you. Will do.

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Occasional "System.Exception: OpenClipboard Failed (Exception from HRESULT: 0x800401D0)"