Drag and Drop on a DataGridView
Here is a bit of sample code that allows you to drag and drop a cellvalue in a DataGridView (don’t forget to set the AllowDrop property of the DataGridView to true). Notice that you need to translate the X and Y properties of the DragEventArgs first (unlike the X and Y properties of the MouseEventArgs)
private void dataGridView1_MouseDown( object sender, MouseEventArgs e )
{
DataGridView.HitTestInfo info = this.dataGridView1.HitTest( e.X, e.Y );
if ( info.RowIndex != -1 && info.ColumnIndex != -1 )
{
Object value = this.dataGridView1.Rows[info.RowIndex].Cells[info.ColumnIndex].Value;
if ( value != null )
{
this.dataGridView1.Rows[info.RowIndex].Cells[info.ColumnIndex].Value = null;
this.DoDragDrop( value, DragDropEffects.Move );
}
}
}
private void dataGridView1_DragDrop( object sender, DragEventArgs e )
{
Point p = this.dataGridView1.PointToClient( new Point( e.X, e.Y ) );
DataGridView.HitTestInfo info = this.dataGridView1.HitTest( p.X, p.Y );
if ( info.RowIndex != -1 && info.ColumnIndex != -1 )
{
Object value = (Object)e.Data.GetData( typeof( string ) );
this.dataGridView1.Rows[info.RowIndex].Cells[info.ColumnIndex].Value = value;
}
}
private void dataGridView1_DragEnter( object sender, DragEventArgs e )
{
e.Effect = DragDropEffects.Move;
}