1 /// <summary>
 2     /// 给DataGridView添加全选
 3     /// </summary>
 4     public class AddCheckBoxToDataGridView
 5     {
 6         public static System.Windows.Forms.DataGridView dgv;
 7         public static void AddFullSelect()
 8         {
 9             if (dgv.Rows.Count < 1)
10             {
11                 return;
12             }
            this.dataGridView1.RowTemplate.Height = 23;
13          System.Windows.Forms.CheckBox ckBox = new System.Windows.Forms.CheckBox();
            ckBox.Text = "全选";
            ckBox.Checked = true;
            System.Drawing.Rectangle rect =
            dataGridView1.GetCellDisplayRectangle(0, -1, true);
            ckBox.Size = new System.Drawing.Size(dataGridView1.Columns[0].Width, 18);
            ckBox.Location =new Point( rect.Location.X+2,rect.Location.Y+2);
            ckBox.CheckedChanged += new EventHandler(ckBox_CheckedChanged);
            dataGridView1.Controls.Add(ckBox);
22         }
23         static void ckBox_CheckedChanged(object sender, EventArgs e)
24         {
25             for (int i = 0; i < dgv.Rows.Count; i++)
26             {
27                 dgv.Rows[i].Cells[0].Value = ((System.Windows.Forms.CheckBox)sender).Checked;
28             }
29             dgv.EndEdit();
30         }
31     }

上面的类第一个方法，是为datagridview表头添加checkbox，第二个方法是全选功能实现。