DataGridView單元格中添加按鈕

        private void dataGridView1_CellEnter(object sender, DataGridViewCellEventArgs e)
        {
            this.dataGridView1.Controls.Clear();//移除所有控件 
            if (e.ColumnIndex.Equals(this.dataGridView1.Columns["編號"].Index))
            //判斷單元格是否是"Company"列？ 
            {
                System.Windows.Forms.Button btn = new System.Windows.Forms.Button();//創建Buttonbtn 
                btn.Text = "...";//設置button文字 
                btn.Font = new System.Drawing.Font("Arial", 7);//設置文字格式 
                btn.Visible = true;//設置控件允許顯示 

                btn.Width = this.dataGridView1.GetCellDisplayRectangle(e.ColumnIndex,
                                e.RowIndex, true).Height;//獲取單元格高並設置為btn的寬 
                btn.Height = this.dataGridView1.GetCellDisplayRectangle(e.ColumnIndex,
                                e.RowIndex, true).Height;//獲取單元格高並設置為btn的高 

                btn.Click += new EventHandler(btn_Click);//為btn添加單擊事件 

                this.dataGridView1.Controls.Add(btn);//dataGridView1中添加控件btn 

                btn.Location = new System.Drawing.Point(((this.dataGridView1.GetCellDisplayRectangle(e.ColumnIndex, e.RowIndex, true).Right) -
                        (btn.Width)),this.dataGridView1.GetCellDisplayRectangle(e.ColumnIndex, e.RowIndex, true).Y);//設置btn顯示位置 
            }
        }

        void btn_Click(object sender,EventArgs  e)
        {
            Form f=new Form();
            f.ShowDialog(this.dataGridView1);
        }