How do I perform drag drop operation between a GroupView and a text editor control ?

You could perform text drag drop operation between a text editor control like RichTextBox and GroupView by handling the GroupView's DragEnter and DragLeave events as shown below :

C#

string draggedtext = "";

private void groupView1_DragEnter(object sender, System.Windows.Forms.DragEventArgs e)

{

this.draggedtext = e.Data.GetData(typeof(string)) as string;

}

private void groupView1_DragLeave(object sender, System.EventArgs e)

{

Point pt = this.groupView1.PointToClient(Control.MousePosition);

if (this.groupView1.ClientRectangle.Contains(pt))

{

if (this.draggedtext != "")

{

GroupViewItem gvi = new GroupViewItem();

gvi.Text = this.draggedtext;

this.groupView1.GroupViewItems.Add(gvi);

}

}

this.draggedtext = "";

}

VB

Dim draggedtext As String = ""

Private Sub groupView1_DragEnter(ByVal sender As Object, ByVal e As System.Windows.Forms.DragEventArgs)

Me.draggedtext = e.Data.GetData(Type.GetType(String)) as String

End Sub

Private Sub groupView1_DragLeave(ByVal sender As Object, ByVal e As System.EventArgs)

Dim pt As Point = Me.groupView1.PointToClient(Control.MousePosition)

If Me.groupView1.ClientRectangle.Contains(pt) Then

If Me.draggedtext.Equals("") Then

'do nothing

Else

Dim gvi As New GroupViewItem()

gvi.Text = Me.draggedtext

Me.groupView1.GroupViewItems.Add(gvi)

End If

Me.draggedtext = ""

End Sub