.NET ถามเรื่องเกี่ยวกับ GridView ค่ะ ASP.NET C#

private string _key;

protected void Page_Load(object sender, EventArgs e)
{
_key = string.Empty;
}

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.RowType == RowType.DataRow)
{
string name = string.Format("{0}{1}", e.Row.Cells[0].Text, e.Row.Cells[1].Text);

if (_key == name)
{
e.Row.Cells[0].Text = string.Empty;
e.Row.Cells[1].Text = string.Empty;
}
else
{
_key = name;
}
}