WCF能够保持在导线参考平等？ [英] Can WCF keep reference equality over the wire?

问题描述

假设你有定义为

[DataContract]
public class Foo
{
    [DataMember]
    public List<Bar> Bars {get; set;}
}

[DataContract]
public class Bar
{
    [DataMember]
    public string Baz { get; set; }
}

public class Service1 : IService1
{
    public bool Send(Foo foo)
    {
        var bars = foo.Bars;

        bars[0].Baz = "test2";
        return bars[0].Baz == bars[1].Baz;
    }
}

[ServiceContract]
public interface IService1
{
    [OperationContract]
    bool Send(Foo composite);
}

假设我使用WCF与客户端之间共享数据合同的DLL WCF和服务器，如果我做类似如下

Assuming I am using WCF to WCF with a shared data contract DLL between the client and server, if I do something like the following

static void Main(string[] args)
{
    using (var client = new ServiceReference.Service1Client())
    {
        var bar = new Bar();
        bar.Baz = "Start";

        List<Bar> bars = new List<Bar>();
        bars.Add(bar);
        bars.Add(bar);

        var foo = new Foo();
        foo.Bars = bars;

        Console.WriteLine(bars[0].Baz == bars[1].Baz);

        bars[0].Baz = "test1";
        Console.WriteLine(bars[0].Baz == bars[1].Baz);

        Console.WriteLine(client.Send(foo));

        Console.ReadLine();
    }

}

我得到真，真，假我的结果，这意味着酒吧[0] 和吧[1] 并没有指向服务器上的同一个对象。

I get True, True, False as my result which means that bars[0] and bars[1] did not point to the same object on the server.

我做得不对，或者是它不可能在WCF已经共享引用？

Am I doing something wrong, or is it impossible to have shared references over WCF?

推荐答案

您有来明确地告诉WCF保存引用通过指定

[DataContract(IsReference = true)]

否则引用消息施工过程中的平等会丢失。

otherwise reference equality is lost during message construction.

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