DataTable 查找填充到 DataTable

DataTable TempDt = new DataTable();

if (comboBox2.Text.Length > 0 && oldstrName != comboBox2.Text)
                {
                    oldstrName = comboBox2.Text;

                    string aa = string.Format("供應商名稱 LIKE '%{0}%'", oldstrName);

                    SetcelDt.Rows.Clear();

                    DataRow[] rows = TempDt.Select(aa);// 從dt 中查詢合適前提的記錄； 
                    foreach (DataRow row in rows)// 將查詢的成果添加到dt中； 
                    {
                        SetcelDt.Rows.Add(row.ItemArray);
                    }
                }