clipboard

  • Thread starter Thread starter Pascal Cloup
  • Start date Start date
P

Pascal Cloup

Hello,

Is it possible to put in the Clipboard, an object which implements the
IDataObject interface but that knows only a format that is not defined in
the DataFormats?
What i want to do is to pull an object from the clipboard lke this:

IDataObject pulledObject = Clipboard.GetDataObject();

if ( pulledObject != null && pulledObject.GetDataPresent(
"MyObjectFormat" ) )

{

CMyClass A = pulledObject.GetData( "MyObjectFormat") as
CMyClass;

}


Pascal
 
Here are two button handlers that put an arbitrary object into a DataObject,
places this DataObject on the Clipboard and then retrieves it.

private void button1_Click(object sender, System.EventArgs e)
{
MyObject o = new MyObject(18);
DataObject data = new DataObject("Mine", o);
Clipboard.SetDataObject(data);
}

private void button2_Click(object sender, System.EventArgs e)
{
if(Clipboard.GetDataObject().GetDataPresent("Mine"))
{
MyObject o = Clipboard.GetDataObject().GetData("Mine") as MyObject;
Console.WriteLine(o);
}
}

=================
Clay Burch, .NET MVP

Visit www.syncfusion.com for the coolest tools
 
Hello Clay,

Thanks for your answer.

I tried what you have suggested in the following manner:

rather than transmit to DataObject an object (A) of my original classe(CA) ,
i transmit an object B of a class (CB) that implements the ISerializable
interface and that describes A. (CA can not be serialized because it is
derived from Control).

When pushing B in the clipboard with :
DataObject D = new DataObject ("Mine",B);
Clipboard.SetDataObject( D, true);

, the method GetObjectData of B is normally called. But When i try to
recover my object from the clipboard i always get a nul reference.

Probably, i miss something, but what?

someone have an idea?

Pascal
 
You might try this. Instead of putting B on the clipboard, put a
memorystream that was created from B through serialization. Then get the
memory stream from the clipboard and use serilization to reconstruct B when
you get ready to paste.

=======================
Clay Burch, .NET MVP

Visit www.syncfusion.com for the coolest tools
 
Hello Clay,


"> You might try this. Instead of putting B on the clipboard, put a
memorystream that was created from B through serialization. Then get the
memory stream from the clipboard and use serilization to reconstruct B when
you get ready to paste.
Click to expand...

I didn't find how to create a MemoryStream object from an object like B that
is a serializable object.
Can-you give a example or a link? the documentation doesn't contain
sufficient details.

thanks in advance
Pascal
 
Hello Clay,


"> You might try this. Instead of putting B on the clipboard, put a
memorystream that was created from B through serialization. Then get the
memory stream from the clipboard and use serilization to reconstruct B when
you get ready to paste.
Click to expand...

I didn't find how to create a MemoryStream object from an object like B that
is a serializable object.
Can-you give a example or a link? the documentation doesn't contain
sufficient details.

thanks in advance
Pascal
 
Attached is a little sample that places an an object on the clipboard and is
able to retrieve it. It does not have to use any serialization as I
suggested earlier. The object has both simple types and a derived object as
members.

=================
Clay Burch, .NET MVP

Visit www.syncfusion.com for the coolest tools

Pascal Cloup said:
Hello Clay,


"> You might try this. Instead of putting B on the clipboard, put a
memorystream that was created from B through serialization. Then get the
memory stream from the clipboard and use serilization to reconstruct B when
you get ready to paste.
Click to expand...

I didn't find how to create a MemoryStream object from an object like B
that
is a serializable object.
Can-you give a example or a link? the documentation doesn't contain
sufficient details.

thanks in advance
Pascal
=======================
Clay Burch, .NET MVP

Visit www.syncfusion.com for the coolest tools

Pascal Cloup said:
Hello Clay,

Thanks for your answer.

I tried what you have suggested in the following manner:

rather than transmit to DataObject an object (A) of my original classe(CA)
,
i transmit an object B of a class (CB) that implements the
ISerializable
interface and that describes A. (CA can not be serialized because it is
derived from Control).

When pushing B in the clipboard with :
DataObject D = new DataObject ("Mine",B);
Clipboard.SetDataObject( D, true);

, the method GetObjectData of B is normally called. But When i try to
recover my object from the clipboard i always get a nul reference.

Probably, i miss something, but what?

someone have an idea?

Pascal

"ClayB [Syncfusion]" <[email protected]> a écrit dans le message de
Here are two button handlers that put an arbitrary object into a
DataObject,
places this DataObject on the Clipboard and then retrieves it.

private void button1_Click(object sender, System.EventArgs e)
{
MyObject o = new MyObject(18);
DataObject data = new DataObject("Mine", o);
Clipboard.SetDataObject(data);
}

private void button2_Click(object sender, System.EventArgs e)
{
if(Clipboard.GetDataObject().GetDataPresent("Mine"))
{
MyObject o = Clipboard.GetDataObject().GetData("Mine") as MyObject;
Console.WriteLine(o);
}
}

=================
Clay Burch, .NET MVP

Visit www.syncfusion.com for the coolest tools

Hello,

Is it possible to put in the Clipboard, an object which implements the
IDataObject interface but that knows only a format that is not defined
in
the DataFormats?
What i want to do is to pull an object from the clipboard lke this:

IDataObject pulledObject = Clipboard.GetDataObject();

if ( pulledObject != null && pulledObject.GetDataPresent(
"MyObjectFormat" ) )

{

CMyClass A = pulledObject.GetData( "MyObjectFormat")
as
CMyClass;

}


Pascal
Click to expand...
Click to expand...
Click to expand...
 
Thank you

I saw where the error was in my code. My serializable class didn't have a
constructor like:
protected MyObject(SerializationInfo info, StreamingContext context)

After verifications, the documentation doesn't indicate that such
constructor have to be implemented.

kind greetings

Pascal
ClayB said:
Attached is a little sample that places an an object on the clipboard and is
able to retrieve it. It does not have to use any serialization as I
suggested earlier. The object has both simple types and a derived object as
members.

=================
Clay Burch, .NET MVP

Visit www.syncfusion.com for the coolest tools

Pascal Cloup said:
Hello Clay,


"> You might try this. Instead of putting B on the clipboard, put a
memorystream that was created from B through serialization. Then get the
memory stream from the clipboard and use serilization to reconstruct B when
you get ready to paste.
Click to expand...

I didn't find how to create a MemoryStream object from an object like B
that
is a serializable object.
Can-you give a example or a link? the documentation doesn't contain
sufficient details.

thanks in advance
Pascal
=======================
Clay Burch, .NET MVP

Visit www.syncfusion.com for the coolest tools

Hello Clay,

Thanks for your answer.

I tried what you have suggested in the following manner:

rather than transmit to DataObject an object (A) of my original classe(CA)
,
i transmit an object B of a class (CB) that implements the
ISerializable
interface and that describes A. (CA can not be serialized because it is
derived from Control).

When pushing B in the clipboard with :
DataObject D = new DataObject ("Mine",B);
Clipboard.SetDataObject( D, true);

, the method GetObjectData of B is normally called. But When i try to
recover my object from the clipboard i always get a nul reference.

Probably, i miss something, but what?

someone have an idea?

Pascal

"ClayB [Syncfusion]" <[email protected]> a écrit dans le message de
Here are two button handlers that put an arbitrary object into a
DataObject,
places this DataObject on the Clipboard and then retrieves it.

private void button1_Click(object sender, System.EventArgs e)
{
MyObject o = new MyObject(18);
DataObject data = new DataObject("Mine", o);
Clipboard.SetDataObject(data);
}

private void button2_Click(object sender, System.EventArgs e)
{
if(Clipboard.GetDataObject().GetDataPresent("Mine"))
{
MyObject o = Clipboard.GetDataObject().GetData("Mine") as MyObject;
Console.WriteLine(o);
}
}

=================
Clay Burch, .NET MVP

Visit www.syncfusion.com for the coolest tools

Hello,

Is it possible to put in the Clipboard, an object which
Click to expand...
implements
the
IDataObject interface but that knows only a format that is not defined
in
the DataFormats?
What i want to do is to pull an object from the clipboard lke this:

IDataObject pulledObject = Clipboard.GetDataObject();

if ( pulledObject != null && pulledObject.GetDataPresent(
"MyObjectFormat" ) )

{

CMyClass A = pulledObject.GetData( "MyObjectFormat")
as
CMyClass;

}


Pascal
Click to expand...
Click to expand...
Click to expand...
 
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