Winform的dataGridView中添加序号

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dataGridView的RowPostPaint事件，双击，吧下面的代考进去，改下dataGridView名字，就ok

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private void dataGridView1_RowPostPaint(object sender, DataGridViewRowPostPaintEventArgs e)
??????? {
??????????? foreach (DataGridViewRow?dr in dataGridView1.Rows)
??????????? {
??????????????? dr .Cells[0].Value = dr .Index+1;
??????????? }
??????? }