c# - LinQ to Entities：做相反的查询

Question

我写了这个：

var destinations = db.DestinationDetails.
    Where(dd => dd.Language.Lang == "en-US" &&
        dd.Destination.Client.Any(c => c.Email == "abc@yahoo.com"));

如何检索电子邮件 abc@yahoo.com 的客户没有的 destinationDetails？

这不起作用：

var destinations = db.DestinationDetails.
    Where(dd => dd.Language.Lang == "en-US" &&
        dd.Destination.Client.Any(c => c.Email != "abc@yahoo.com"));

谢谢！

Answer 1

我认为您想使用 All 而不是 Any：

dd.Destination.Client.All(c => c.Email != "abc@yahoo.com")

Answer 2

尝试

var destinations = db.DestinationDetails.
    Where(dd => dd.Language.Lang == "en-US" &&
        !dd.Destination.Client.Any(c => c.Email == "abc@yahoo.com"));

Answer 3

var destinations =(db.DestinationDetails.
    Where(dd => dd.Language.Lang == "en-US" &&
    dd.Destination.Client.Any(c => c.Email != "abc@yahoo.com")).Select c).ToList();

试试这个，你可能会得到结果...