问加载缓慢的Datagridview

EN

IVCEntities db = new IVCEntities();
System.Data.SqlClient.SqlParameter nnar = 
new System.Data.SqlClient.SqlParameter("@nnar", NumNaryd);
var view = db.Database.SqlQuery<Reestr>("select  * from Reestr where Status <> 'Printed' and NumNar = @nnar ", nnar);
foreach (var v in view)
            {
                DataGridViewRow row = new DataGridViewRow();
                row.CreateCells(dgvView);
                row.Cells[0].Value = v.NumNar.ToString().Substring(5));
                row.Cells[1].Value = v.TabNum;
                row.Cells[2].Value = v.Status;
                row.Cells[3].Value = v.Detal;
                row.Cells[4].Value = v.DateForm.ToShortDateString();
                row.Cells[5].Value = v.Naladchik;
                dgvView.Rows.Add(row);
            }