DataGridView拖动;下降

Question

我还在学习C＃，所以我希望有人可以帮助我。

我有两个DataGridView个对象，当我从datagridview1拖放时，它可以工作，但如果我再次从datagridview1拖动到2，则数据会覆盖第一列的值。每次重复都会创建一个额外的空白列，其中包含来自datagridview1的列名，但不会将值复制到其各自的列中。所有值都将位于第一列。

private void dataGridView1_DragDrop(object sender, DragEventArgs e)
    {

        List<int> selectedColumns = new List<int>();
        // The mouse locations are relative to the screen, so they must be 
        // converted to client coordinates.
        Point clientPoint = dataGridView1.PointToClient(new Point(e.X, e.Y));
        dataGridView1.DataBindings.Clear();
        // Get the row index of the item the mouse is below. 
        rowIndexOfItemUnderMouseToDrop = dataGridView1.HitTest(clientPoint.X, clientPoint.Y).RowIndex;


        // If the drag operation was a move then remove and insert the row.
        if (e.Effect == DragDropEffects.Move)
        {
            DataGridViewRow rowToMove = e.Data.GetData(typeof(DataGridViewRow)) as DataGridViewRow;

            listBox1.Items.Add(rowIndexOfItemUnderMouseToDrop.ToString());
            listBox1.Items.Add(columIndexFromMouseDown.ToString());

           // dataGridView1.Rows.RemoveAt(rowIndexFromMouseDown);

            foreach (DataGridViewColumn col in dataGridView1.Columns)
            {
                if (col.Index == columIndexFromMouseDown)
                {
                    dataGridView2.Columns.Add((DataGridViewColumn)col.Clone());
                    selectedColumns.Add(columIndexFromMouseDown);

                }
            }

            int rowIndex = 0;

            foreach (DataGridViewRow row in dataGridView1.Rows)
            {

                dataGridView2.Rows.Add();

                for (int i = 0; i < selectedColumns.Count; i++)
                {
                    dataGridView2.Rows[rowIndex].Cells[i].Value = row.Cells[selectedColumns[i]].Value;
                }

                rowIndex++;
            }

         //   dataGridView1.Rows.Insert(rowIndexOfItemUnderMouseToDrop, rowToMove);
          }

      // dataGridView1.DataSource = DataSetRecords.Tables[0];
    }

附件是代码。

有什么想法吗？提前致谢。