查看相关帖子但仍有困难。这是我的代码:
var id = Request.QueryString["id"].AsInt();
var accountNum = Request.QueryString["accountnum"];
var orderIDs = new List<OrderID>();
// Order IDs are in the form: OrderNum-OrderLine[,...]
// e.g. orderids=41417-6,36703-1
foreach (var orderID in Request.QueryString["orderids"].Split(',')) {
var components = orderID.Split('-');
orderIDs.Add(new OrderID() {
OrderNum = components[0].AsInt(),
OrderLine = components[1].AsInt()
});
}
var dbContext = new TelecomEntities();
var assignedLines = dbContext.LineAssignments
.Where(a => orderIDs
.Any(i => a.OrderNum == i.OrderNum && a.OrderLine == i.OrderLine))
.ToList();
运行时,我收到错误:无法创建“OrderID”类型的常量值。在此上下文中仅支持原始类型或枚举类型。
根据我在其他帖子中看到的内容,我无法执行查询,因为orderIDs
不在dbContent
上下文中。
编辑:OrderID类
public class OrderID
{
public int OrderNum { get; set; }
public int OrderLine { get; set; }
public OrderID() { }
}
答案 0 :(得分:0)
我认为它是AsInt(我以前从未见过,但我认为它是WebPages的一部分)。
你是否在foreach中得到错误?如果是这样,请尝试这样做:
foreach (var orderID in testOrderIDs.Split(','))
{
var components = orderID.Split('-');
orderIDs.Add(new OrderID()
{
OrderNum = int.Parse(components[0]),
OrderLine = int.Parse(components[1])
});
}
答案 1 :(得分:0)
问题是EF无法将您的比较转换为OrderID对象到SQL。一种选择可能是将订单ID保留为字符串:
var id = Request.QueryString["id"].AsInt();
var accountNum = Request.QueryString["accountnum"];
string[] orderIDs;
// Order IDs are in the form: OrderNum-OrderLine[,...]
// e.g. orderids=41417-6,36703-1
orderIDs = Request.QueryString["orderids"].Split(',');
var dbContext = new TelecomEntities();
var assignedLines = dbContext.LineAssignments
.Where(a => orderIDs
.Any(on => on.Equals(a.OrderNum + "-" + a.OrderLine))
.ToList();