Problem with Feature missing (File Drag Drop) at RichTextBox in CSharp

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I work in a Windows Form Application and would like to drag and drop a file on a RichTextBox and display its contents in the RichTextBox. While I have no problem to do this with a simple TextBox, in a RichTextBox I don't get this to work because the necessary two drag drop events are missing in the controls properties dialogbox in events in the first place.
I could find a code and have put it in Form_Load, but in the RichTextBox stays the File DragDrop still unavailable.

That's my not working code: It just doens't function errors where not occuring.

C#

this.richTextBox1.AllowDrop = true;
this.richTextBox1.DragEnter += new System.Windows.Forms.DragEventHandler(this.RichTextBoxDragEnter);
this.richTextBox1.DragDrop += new System.Windows.Forms.DragEventHandler(this.RichTextBoxDragDrop);

Any other ideas on how / why the RichTextBox has no DragDrop functions by default
and how to add them?

Posted 29-Mar-15 0:37am

Grumpyman

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OriginalGriff · Answer 1 · 2015-03-29T01:01:00

It does: or at least in my version of VS it does! But not from the Design window, strangely...
Don't forget, to get it to work, you need to add code to your events:

C#

txtDetail.AllowDrop = true;
    txtDetail.DragEnter += txtDetail_DragEnter;
    txtDetail.DragDrop += txtDetail_DragDrop;
    }


void txtDetail_DragEnter(object sender, DragEventArgs e)
    {
    e.Effect = DragDropEffects.Copy;
    }
void txtDetail_DragDrop(object sender, DragEventArgs e)
    {
    ...
    }

If you don't set the Effect, then DragDrop will not work.