GridView C# กำหนดเงื่อนไขให้แสดงแค่บางแถว ยังไงครับ รบกวนชี้แนะด้วยครับ

 int maxRow = GridView1.Rows.Count;
            string[] arrRow = new string[maxRow];

            
            

            for (int i = 0; i < maxRow ; i++) {
                arrRow[i] = GridView1.Rows[i].Cells[1].Text;
                
                
                SqlConnection conn = new SqlConnection("Data Source=VAN;Initial Catalog=PhotoRecord;Persist Security Info=True;User ID=sa;Password=P@ssw0rd;"); //connection string
                conn.Open();
                if (chkAll.Checked == true)
                {
                    SqlCommand cmd = new SqlCommand("SELECT * FROM dbo.photo_info WHERE OrderNo LIKE '%" + arrRow[i] + "%'", conn);
                    SqlDataReader reader = cmd.ExecuteReader();
                    if (reader.Read())
                    {
                        
                    }
                    else
                    {

                        GridView1.DeleteRow(i);

                    }
                    conn.Close();
                }