Question

我想这样做：

var test = SqlCompact("OrderID", "ASC")

因此，这应按订单ID对以下连接查询进行排序：

var result = (from od in orders
        join em in employees on od.EmployeeID equals em.EmployeeID
        join ct in customers on od.CustomerID equals ct.CustomerID
        //orderby em.EmployeeID
        select new
        {
            od.OrderID,
            od.ShipCountry,
            ct.CompanyName,
            ct.ContactName,
            FullName = em.FirstName + ' '+ em.LastName, 
        }).ToList();

我的尝试：

var result2 = result.ToList();
if (sort == "OrderID"){
 result2 = result.OrderBy("OrderID");
}

但我收到错误：

＆＃39; System.Collections.Generic.List＆＃39;不包含＆＃39; OrderBy＆＃39;的定义和最好的扩展方法重载＆＃39; System.Linq.Dynamic.DynamicQueryable.OrderBy（System.Linq.IQueryable，string，params object []）＆＃39;有一些无效的论点

Answer 1

这个怎么样

var result2 = result.ToList();
if (sort == "OrderID"){
 result2 = result.OrderBy(x=>x.OrderID).ToList();
}

如何在连接查询中使用动态字符串参数顺序执行OrderBy

1 个答案: