为什么不能WCF通过在字典的对象？ [英] Why can't WCF pass an object in a dictionary?

问题描述

在我的WCF服务，我定义为KnownType和ServiceKnown类型的对象QualifiedNumber。如果我用QualifiedNumber以下方法：

In my WCF service I have the object QualifiedNumber defined as KnownType and ServiceKnown type. If I used the QualifiedNumber in the following methods:

这一个不工作。它抛出一个异常，在部分的内容：

This one does NOT work. It throws an exception that in part reads:

元素http://schemas.microsoft.com/2003/10/Serialization/Arrays:Value包含的数据http://schemas.datacontract.org/2004/07 ServiceLibrary.Web.Model： QualifiedNumber数据契约。解串器并不知道映射到本合同的任何类型的。  无法反序列化，因为QualifiedNumber的定义是不知道。

'Element 'http://schemas.microsoft.com/2003/10/Serialization/Arrays:Value' contains data of the 'http://schemas.datacontract.org/2004/07 ServiceLibrary.Web.Model:QualifiedNumber' data contract. The deserializer has no knowledge of any type that maps to this contract. cannot deserialize because the definition of QualifiedNumber is not known.

 [OperationContract]
    public Dictionary<int, object> TestDictionaryGet()
    {
        Dictionary<int, object> retDict = new Dictionary<int, object>();

        retDict.Add(1, new QualifiedNumber(new decimal(1.2), "<"));
        retDict.Add(2, "pass a simple string");

        return retDict;
    }

这人做工作

 public struct element
    {
        public int key;
        public object value;
    }

    [OperationContract]
    public List<element> TestElementListGet()
    {
        Dictionary<int, object> retDict = new Dictionary<int, object>();

        retDict.Add(1, new QualifiedNumber(new decimal(1.2), "<"));
        retDict.Add(2, "pass a simple string");


        List<element> retElements = new List<element>();
        foreach (KeyValuePair<int, object> item in retDict)
        {
            element newElement;
            newElement.key = item.Key;
            newElement.value = item.Value;

            retElements.Add(newElement);
        }

        return retElements;
    }

这是关于引起异常的字典吗？

What is it about the dictionary that causes the exception?

推荐答案

下面是在WCF对通用词典序列化的详细文章：

Here is a detailed article on generic dictionary serialization over WCF:

的http://www.request-response.com/blog/PermaLink,guid,ff5fab81-affb-4b2b-aa67-c80bdfc86cbd.aspx

这是那篇文章的外卖报价是：

The takeaway quote from that article would be:

有没有办法使用WSDL / XSD有意义地传达一个.NET字典类的语义。

There is no way to meaningfully convey the semantics of a .NET dictionary class using WSDL/XSD.

这篇关于为什么不能WCF通过在字典的对象？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！