if（dataGridView1.CurrentCell.OwningColumn.Name=="列名")
{
button1.visable=true;
button2.visable=true;

button1.Left = this.dataGridView1.GetCellDisplayRectangle(e.ColumnIndex, e.RowIndex, true).Left;
button1.Top = this.dataGridView1.GetCellDisplayRectangle(e.ColumnIndex, e.RowIndex, true).Top;
button1.Width = this.dataGridView1.GetCellDisplayRectangle(e.ColumnIndex, e.RowIndex, true).Width;
                    this.dataGridView1.Controls.Add(button1);

button2.Left = this.dataGridView1.GetCellDisplayRectangle(e.ColumnIndex, e.RowIndex, true).Left;
button2.Top = this.dataGridView1.GetCellDisplayRectangle(e.ColumnIndex, e.RowIndex, true).Top;
button2.Width = this.dataGridView1.GetCellDisplayRectangle(e.ColumnIndex, e.RowIndex, true).Width;
                    this.dataGridView1.Controls.Add(button2);

}
else
{
button1.visable=false;
button2.visable=false;

}

------解决方案--------------------

添加一个DataGridView控件, 然后使用下面的代码试试:

C# code
        private void Form1_Load(object sender, EventArgs e)
        {
            this.dataGridView1.Columns.Add("a", "a");
            this.dataGridView1.Columns.Add("b", "b");
            this.dataGridView1.Columns.Add("c", "c");

            for (int i = 0; i < 3; i++)
                this.dataGridView1.Rows.Add();

            for (int i = 0; i < 3; i++)
            {
                Button[] btn = new Button[2];
                btn[0] = new Button();
                btn[0].Text = "one";
                btn[1] = new Button();
                btn[1].Text = "two";
                this.dataGridView1.Controls.Add(btn[0]);
                this.dataGridView1.Controls.Add(btn[1]);
                Rectangle rect = this.dataGridView1.GetCellDisplayRectangle(2, i, false);
                btn[0].Size = btn[1].Size = new Size(rect.Width / 2, rect.Height);
                btn[0].Location = new Point(rect.Left, rect.Top);
                btn[1].Location = new Point(rect.Left + btn[0].Width, rect.Top);
                btn[0].Click += new EventHandler(CustomBtn_Click);
                btn[1].Click += new EventHandler(CustomBtn_Click);
            }
        }
        void CustomBtn_Click(object sender, EventArgs e)
        {
            MessageBox.Show((sender as Button).Text);
        }

------解决方案--------------------

在下面的两个事件中重定位一下Button的位置:

C# code
        //  滚动DataGridView时调整Button位置
        private void DataGridView_Scroll(object sender, ScrollEventArgs e)
        {
        }
        //  改变DataGridView列宽时调整Button位置
        private void DataGridView_ColumnWidthChanged(object sender, DataGridViewColumnEventArgs e)
        {
        }