我认为这会奏效：

var pop = (from po in ctx.PurchaSEOrders
               let poid = po.PurchaSEOrderID.ToString()
               where poid.Contains(term)
               select new SearchItem
               {
                   id = poid,label = po.SupplierID,category = "purchaSEOrder"
               }).ToList();

但是我收到了一个错误

LINQ to Entities does not recognize the method 'System.String ToString()' method,and this method cannot be translated into a store expression.

如何将INT PurchaSEOrderID转换为字符串以使我能够搜索它的片段？

谢谢