DataGridView 单元格中添加按钮

今晚学的，说得不是很清楚
//单元格获得焦点
        private void dataGridView1_CellEnter(object sender, DataGridViewCellEventArgs e)
        {

            if (e.ColumnIndex.Equals(this.dataGridView1.Columns["Company"].Index))
//判断单元格是否是"Company"列？
            {

                this.dataGridView1.Controls.Clear();  //移除所有控件
                Button btn = new Button();  //创建Button btn
                btn.Text = "...";  //设置button文字
                btn.Font = new Font("Arial", 7);   //设置文字格式
                btn.Visible = true;  //设置控件允许显示
                btn.Width = this.dataGridView1.GetCellDisplayRectangle(e.ColumnIndex,
e.RowIndex,true).Height;  //获取单元格高并设置为btn的宽
                btn.Height = this.dataGridView1.GetCellDisplayRectangle(e.ColumnIndex,
e.RowIndex, true).Height;  //获取单元格高并设置为btn的高
                btn.Click += new EventHandler(btn_Click);  //为btn添加单击事件
                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); //设置btn显示位置
//(this.dataGridView1.GetCellDisplayRectangle(e.ColumnIndex,e.RowIndex,true).Right)-(btn.Width)
//获取单元格方框右边位置减去btn的宽，得到btn在dataGridView1中的横坐标
//this.dataGridView1.GetCellDisplayRectangle(e.ColumnIndex,e.RowIndex,true).Y
//获取单元格的纵坐标并设为btn在dataGridView1中的纵坐标

            }

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

--------------------编程问答-------------------- 有点BUG
以下修正
private void dataGridView1_CellEnter(object sender, DataGridViewCellEventArgs e)
        {
            if (e.ColumnIndex.Equals(this.dataGridView1.Columns["Company"].Index))
            {

                //this.dataGridView1.Controls.Clear(); 此处的清除控件应该放在CellLeave事件中处理
//
                Button btn = new Button();
                btn.Text = "...";
                btn.Font = new Font("Arial", 7);
                btn.Visible = true;
                btn.Width = this.dataGridView1.GetCellDisplayRectangle(e.ColumnIndex, e.RowIndex, true).Height;
                btn.Height = this.dataGridView1.GetCellDisplayRectangle(e.ColumnIndex, e.RowIndex, true).Height;

                this.dataGridView1.Controls.Add(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);
                btn.Click += new EventHandler(btn_Click);
            }

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

        private void dataGridView1_CellLeave(object sender, DataGridViewCellEventArgs e)
        {
            this.dataGridView1.Controls.Clear();  //清除集合中控件
        } --------------------编程问答-------------------- 好贴! --------------------编程问答-------------------- butten 是能添加但是如果主窗体变化  butten的位置怎么处理？ --------------------编程问答-------------------- 当拖动滚动条的时候问题完全暴漏了

补充：.NET技术 ,  C#