Hi all,

How can I refer to DataRowView in GridView1.SelectedIndexChanged Event, I try code below, but system NullReferenceException error.

 protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
    {
        DataRowView drv = (DataRowView) GridView1.SelectedRow.DataItem;
        TextBox1.Text = drv["id"].ToString();
        
    }

TIA.