e-සටහන්: Drag Drop with a Custom Icon in C#

Code:

        private void frmDragDrop_Load(object sender, EventArgs e)

{

            //enable the dragged item to be dropped on to the target

            this.txtDropTarget.AllowDrop = true;

            //to make the custom drag icon visible over the form

            //we must allow drop on the form but take no action upon it

            this.AllowDrop = true; 

}

        private void lblDragSource_MouseDown(object sender, MouseEventArgs e)

{

            //initiate the drag operation

            //the given DragDropEffect iindicates cursor to use when dropping is allowed

            lblDragSource.DoDragDrop(lblDragSource.Text, DragDropEffects.Copy);

}

        private void txtDropTarget_DragEnter(object sender, DragEventArgs e)

{

            //if dragging has data, show the droppable cursor

            //otherwise show the no-drop cursor

            if (e.Data.GetDataPresent(DataFormats.Text))

                e.Effect = DragDropEffects.Copy;

            else

                e.Effect = DragDropEffects.None;

}

        private void frmDragDrop_DragEnter(object sender, DragEventArgs e)

{

            //this is where the actual "show drag icon over the form" occurs

            if (e.Data.GetDataPresent(DataFormats.Text))

                e.Effect = DragDropEffects.Copy;

            else

                e.Effect = DragDropEffects.None;

}

        private void txtDropTarget_DragDrop(object sender, DragEventArgs e)

{

            //process the drop action

            txtDropTarget.Text = (string)e.Data.GetData(DataFormats.Text);

}

        private void lblDragSource_GiveFeedback(object sender, GiveFeedbackEventArgs e)

{

            //customize the drag cursor for the given DragDropEffect for this control

            e.UseDefaultCursors = e.Effect != DragDropEffects.Copy;

            Cursor.Current = new Cursor("1.ico");

}

e-සටහන්