如何取出Gridview选中行的数值

如何取出gridview中的值呢？
百度之：

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GridView1.Rows[GridView1.SelectedIndex].Cells[1].Text;
GridView1.Rows[GridView1.SelectedIndex].Cells[2].Text;
GridView1.Rows[GridView1.SelectedIndex].Cells[3].Text;