将datagridview中的值拖放到textbox控件中

private void Form1_Load(object sender, EventArgs e)
        {
            List<users> list = new List<users>();
            for (int i = 0; i < 10; i++)
            {
                users u = new users() { uid = i, name = i.ToString() };
                list.Add(u);
            }
            this.dataGridView1.DataSource = list;
            this.textBox1.AllowDrop = true;//设置可接受拖放到上面数据
        }

 private void dataGridView1_MouseDown(object sender, MouseEventArgs e)
        {
            if (e.Button == System.Windows.Forms.MouseButtons.Left)
            {
                DataGridView.HitTestInfo info = this.dataGridView1.HitTest(e.X, e.Y); //获取行、列信息
                if (info.RowIndex > -1 && info.ColumnIndex > -1)
                {
                    string text = this.dataGridView1.Rows[info.RowIndex].Cells[info.ColumnIndex].Value.ToString();///获取值
                    if (text != null)
                    {
                        this.dataGridView1.DoDragDrop(text, DragDropEffects.Copy);///开始拖放操作
                    }
                }
            }
        }

private void textBox1_DragEnter(object sender, DragEventArgs e)
        {
            e.Effect = DragDropEffects.Copy;
        }

        private void textBox1_DragDrop(object sender, DragEventArgs e)
        {
            if (e.Data.GetDataPresent(typeof(String)))
            {
                this.textBox1.Text = e.Data.GetData(DataFormats.Text).ToString();
            }
        }