DataGridView显示行号的方法

// 应该设置下面属性，防止行号被掩盖
// dataGridView1.RowHeadersWidthSizeMode = DataGridViewRowHeadersWidthSizeMode.AutoSizeToDisplayedHeaders;
void dataGridView1_RowsRemoved(object sender, DataGridViewRowsRemovedEventArgs e)
{
RefreshDataGridViewLineNumber(e.RowIndex);
}

void dataGridView1_RowsAdded(object sender, DataGridViewRowsAddedEventArgs e)
{
RefreshDataGridViewLineNumber(e.RowIndex);
}

private void RefreshDataGridViewLineNumber(int index)
{
for (int i = index; i < dataGridView1.Rows.Count; i++)
{
this.dataGridView1.Rows[i].HeaderCell.Value = (i + 1).ToString();
}
}