用两个datagridviews在两个窗体之间拖放C＃

Question

I have recently finished my drag drop event between two datagridviews on my main form , and it works well. Now, however, I have decided to make a change that requires datagridview2 to be on another form ( form2 ). Can anyone tell me how to drag drop between two datagridviews , while on separate forms ?

Below is my existing code:

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
    }

    private void dataGridView1_DragDrop(object sender, DragEventArgs e)
    {
        if (e.Data.GetDataPresent(typeof(System.String)))
        {
            Point clientPoint = dataGridView1.PointToClient(new Point(e.X, e.Y));
            dataGridView1.Rows[dataGridView1.HitTest(clientPoint.X, clientPoint.Y).RowIndex].Cells[dataGridView1.HitTest(clientPoint.X, clientPoint.Y).ColumnIndex].Value = (System.String)e.Data.GetData(typeof(System.String));
        }
    }

    private void dataGridView1_DragEnter(object sender, DragEventArgs e)
    {
        if (e.Data.GetDataPresent(typeof(System.String)))
            e.Effect = DragDropEffects.Copy;
        else
            e.Effect = DragDropEffects.None;
    }

    private void dataGridView2_CellMouseDown(object sender, DataGridViewCellMouseEventArgs e)
    {
        if (e.RowIndex > -1 && e.ColumnIndex > -1)
            dataGridView2.DoDragDrop(
               dataGridView2.Rows[e.RowIndex]
                            .Cells[e.ColumnIndex]
                            .Value.ToString(),
               DragDropEffects.Copy);
    }

Answer 1

I my opinion drag and drop between two different forms work same like on one form. Are you sure that dataGridView1 property AllowDrop is set to True?