DataGridView显示行号

private void DataGridView1_RowsAdded(object sender, DataGridViewRowsAddedEventArgs e)

        {

            for (int i = 0; i < e.RowCount; i++)

            {

                this.DataGridView1.Rows[e.RowIndex + i].HeaderCell.Style.Alignment = DataGridViewContentAlignment.MiddleRight;

                this.DataGridView1.Rows[e.RowIndex + i].HeaderCell.Value = (e.RowIndex + i + 1).ToString();

            }

            for (int i = e.RowIndex + e.RowCount; i < this.DataGridView1.Rows.Count; i++)

            {

                this.DataGridView1.Rows[i].HeaderCell.Style.Alignment = DataGridViewContentAlignment.MiddleRight;

                this.DataGridView1.Rows[i].HeaderCell.Value = (i + 1).ToString();

            }

        }



private void DataGridView1_RowsRemoved(object sender, DataGridViewRowsRemovedEventArgs e)

        {

            if (DataGridView1.Rows.Count != 0)

            {

                for (int i = 0; i < e.RowCount; i++)

                {

                    this.DataGridView1.Rows[e.RowIndex + i].HeaderCell.Style.Alignment = DataGridViewContentAlignment.MiddleRight;

                    this.DataGridView1.Rows[e.RowIndex + i].HeaderCell.Value = (e.RowIndex + i + 1).ToString();

                }



                for (int i = e.RowIndex + e.RowCount; i < this.DataGridView1.Rows.Count; i++)

                {

                    this.DataGridView1.Rows[i].HeaderCell.Style.Alignment = DataGridViewContentAlignment.MiddleRight;

                    this.DataGridView1.Rows[i].HeaderCell.Value = (i + 1).ToString();

                }



            }

        } 

如果显示的行号有被遮挡住，可将DataGridView的RowsHeaderWidthSizeMode属性设置为AutoSizeToAllHeaders或者AutoSizeToDisplayedHeaders。