Question

How can I get an event to send an argument to a function? So I can have dataGridView1 & dataGridView2 both using the function dataGridView1_MouseMove?

private void dataGridView1_MouseMove(object sender, MouseEventArgs e)
{
    if ((e.Button & MouseButtons.Left) == MouseButtons.Left)
    {
        // If the mouse moves outside the rectangle, start the drag.
        if (dragBoxFromMouseDown != Rectangle.Empty &&
        !dragBoxFromMouseDown.Contains(e.X, e.Y))
        {
            // Proceed with the drag and drop, passing in the list item.                   
            DragDropEffects dropEffect = dataGridView1.DoDragDrop(
                  dataGridView1.Rows[rowIndexFromMouseDown],
                  DragDropEffects.Move);
        }
    }
}

I’m currently using this function as well as some others to allow the rows in the dataGridView1 to be dragged and dropped, how can I use this same function for dataGridView2?

Answer 1

how can I use this same function for dataGridView2?

If you want to use the same method, you need to never refer to dataGridView1 directly.

Instead, change it to use sender as your DataGridView, like so:

private void dataGridView1_MouseMove(object sender, MouseEventArgs e)
{
    // Use this instead of dataGridView1
    DataGridView dgv = sender as DataGridView;

    if (dgv == null) // Add some checking
    {
        return;
    }

    if ((e.Button & MouseButtons.Left) == MouseButtons.Left)
    {
         //...

Once you’ve done this, you can add the subscription to any number of DataGridView instances, and they’ll all use the same event handler.