C# DataGridView 表格行(Row) 上下移动

https://blog.csdn.net/plato_2/article/details/17434715?spm=1001.2101.3001.6650.2&utm_medium=distribute.pc_relevant.none-task-blog-2%7Edefault%7ECTRLIST%7ERate-2.pc_relevant_default&depth_1-utm_source=distribute.pc_relevant.none-task-blog-2%7Edefault%7ECTRLIST%7ERate-2.pc_relevant_default&utm_relevant_index=4

好像有用吧，但是太麻烦了

https://blog.csdn.net/xiaotaibai2008/article/details/8099348

（1）首先在form中添加一个DataGridView控件，将默认AllowDrop=false 的属性设置为True，否侧不能拖动！
（2）对DataGridView的对象实现非数据源的绑定，因为设置DataSource属性即当控件被数据绑定时，无法以编程方式向 DataGridView 的行集合中添加行。

2.代码准备
(1)控制移动时鼠标的图形，否则是一个禁止移动的标识
        private void dataGridView1_DragEnter(object sender, DragEventArgs e)
        {
            e.Effect = DragDropEffects.Move;
        }

(2)控制拖动的条件,也可以自行放宽条件
        private void  dataGridView1 _CellMouseMove(object sender, DataGridViewCellMouseEventArgs e)
        {
            if ((e.Clicks < 2) && (e.Button == MouseButtons.Left))
            {
                if ((e.ColumnIndex == -1) && (e.RowIndex > -1))
                    dataGridView1.DoDragDrop(dataGridView1.Rows[e.RowIndex], DragDropEffects.Move);
            }
        }

(3)拖动后实现行的删除和添加，实现行交换位置的错觉
        int selectionIdx = 0;
        private void  dataGridView1_DragDrop(object sender, DragEventArgs e)
        {
            int idx = GetRowFromPoint(e.X, e.Y);

            if (idx < 0) return;

            if (e.Data.GetDataPresent(typeof(DataGridViewRow)))
            {
                DataGridViewRow row = (DataGridViewRow)e.Data.GetData(typeof(DataGridViewRow));
                dataGridView1.Rows.Remove(row);
                selectionIdx = idx;
                dataGridView1.Rows.Insert(idx, row);
            }
        }

        private int GetRowFromPoint(int x, int y)
        {
            for (int i = 0; i < dataGridView1.RowCount; i++)
            {
                Rectangle rec = dataGridView1.GetRowDisplayRectangle(i, false);

                if (dataGridView1.RectangleToScreen(rec).Contains(x, y))
                    return i;
            }

            return -1;
        }

(4)控制被移动的行始终是选中行
        private void kryptonDataGridView1_RowsAdded(object sender, DataGridViewRowsAddedEventArgs e)
        {
            if (selectionIdx > -1)
            {
                dataGridView1.Rows[selectionIdx].Selected = true;
                dataGridView1.CurrentCell = dataGridView1.Rows[selectionIdx].Cells[0];
            }
        }
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原文链接：https://blog.csdn.net/xiaotaibai2008/article/details/8099348