System.ObjectDisposedException: Cannot access a closed Stream when running this statement MemoryStream stream = (MemoryStream)data.GetData(cbExpression, false)

HARISH VN 1

public ResolvedExpression GetClipBoardExpression()
{
try
{

            IDataObject data = Clipboard.GetDataObject();
            if (!data.GetDataPresent(cbExpression, false))
                return null;

            using (MemoryStream stream = (MemoryStream)data.GetData(cbExpression, false))   `**>>>>>> Exception comes here , And this happens when copy and pasting text using ctrl+c and ctrl+v  and only using RealVNC veiwer.**

            {
                    BinaryReader reader = new BinaryReader(stream, System.Text.Encoding.UTF8);
      }

Viorel 118.1K Reputation points

2021-07-27T08:14:38.487+00:00

Is this a custom clipboard format? Show how did you write the data to clipboard.
Daniel Zhang-MSFT 9,626 Reputation points

2021-07-28T05:59:22.893+00:00
Hi @HARISH VN ,
If you do not put the MemoryStream in the using statement, does the same error occur?
Please try to replace the using block with following code:

MemoryStream stream = (MemoryStream)data.GetData(cbExpression, false); try { //... } catch { //... stream .Dispose(); throw; }

Best Regards,
Daniel Zhang
HARISH VN 1 Reputation point

2021-07-28T07:40:28.783+00:00

Hi
yes this solution was tried already but it is not working
The problem is when i take the node where application is running in VNC viewer then only this crash/exceptions happens
otherwise it does not happen
Daniel Zhang-MSFT 9,626 Reputation points

2021-07-29T02:12:45.4+00:00

Hi @HARISH VN ,
As it may be caused by the VNC viewer, it is recommended that you go to the VNC viewer related forum for more professional help.
Best Regards,
Daniel Zhang

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System.ObjectDisposedException: Cannot access a closed Stream when running this statement MemoryStream stream = (MemoryStream)data.GetData(cbExpression, false)

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