Can't get object out of the clipboard

[Guest]

I put an instance of a class of mine in the clipboard and when I try to get it back the clipboard reports that it contains the format I am asking for, but then returns null

The code is as following

// copy
IDataObject iData = new DataObject()
// myClass is [Serializable] and contains only string and int public member
myClass data = new myClass()
iData.SetData( typeof( myClass ), data )
Clipboard.SetDataObject( iData, false )

// past
IDataObject iData = Clipboard.GetDataObject()
if ( iData.GetDataPresent( typeof( myClass ) )

// here null is always returne
myClass data = (myClass)iData.GetData( typeof( myClass ) )


I have read postings from other people in various places asking help on variations of this problem, but there has never been a conclusive answer. Could it be a bug?

Thanks
Raul Rosentha

 

[Janaka]

I thought that the clipboard could only store value types, hence why your
not able to set and retrieve a reference type.

I put an instance of a class of mine in the clipboard and when I try to

get it back the clipboard reports that it contains the format I am asking
for, but then returns null.

The code is as following:

// copy
IDataObject iData = new DataObject();
// myClass is [Serializable] and contains only string and int public members
myClass data = new myClass();
iData.SetData( typeof( myClass ), data );
Clipboard.SetDataObject( iData, false );

// paste
IDataObject iData = Clipboard.GetDataObject();
if ( iData.GetDataPresent( typeof( myClass ) ) )
{
// here null is always returned
myClass data = (myClass)iData.GetData( typeof( myClass ) );
}

I have read postings from other people in various places asking help on

variations of this problem, but there has never been a conclusive answer.
Could it be a bug?

 

[Guest]

Thank you for your reply

I tried making myClass a struct (which should make it a value type), but the problem didn't go away
I think that I saw same example in MSDN that uses objects (i.e. instances of a class) to put data in the clipboard.