WCF中的远程主机强制关闭现有连接 [英] An existing connection was forcibly closed by the remote host in WCF

问题描述

我有一个名为Template的抽象类，定义为：

I have an abstract class called 'Template' defined as:

[DataContract]
public abstract class Template
{
    [DataMember]
    public virtual int? Id { get; set; }
    [DataMember]
    public virtual string Title { get; set; }
    [DataMember]
    public virtual byte[] TemplateDoc { get; set; }
    [DataMember]
    public virtual bool IsSystemTemplate { get; set; }        
}

两个派生类：UserTemplate和SystemTemplate实现了上面的抽象类，定义了作为：

Two derived classes: UserTemplate and SystemTemplate implements above abstract class, which are defined as:

public class UserTemplate : Template
{
    [DataMember]
    public virtual Int32? OfficeId { get; set; }

    [DataMember]
    public virtual Int32? UserId { get; set; }

    protected UserTemplate() { }

    public UserTemplate(string title, byte[] templateDoc, string templateDocName, TemplateType templateType, int officeId, int? userId)
    {
        this.Title = title;
        this.TemplateDoc = templateDoc;
        this.IsSystemTemplate = false;
        this.OfficeId = officeId;
        this.UserId = userId;
    }
}

public class SystemTemplate : Template
{
    [DataMember]
    public virtual Int32? MultiListGroupId { get; set; }

    protected SystemTemplate() { }

    public SystemTemplate(string title, byte[] templateDoc, string templateDocName, TemplateType templateType, int multiListGroupId)
    {
        this.Title = title;
        this.TemplateDoc = templateDoc;
        this.IsSystemTemplate = true;
        this.MultiListGroupId = multiListGroupId;
    }
}

现在，当我尝试调用以下服务方法：

Now, when I try to call following service method:

List<Template> GetTemplatesByTemplateType(int officeId, int? userId, TemplateType templateType)

我得到这个错误：

System.Net.Sockets.SocketException：远程主机强制关闭现有连接

System.Net.Sockets.SocketException: An existing connection was forcibly closed by the remote host

是因为我正在尝试返回抽象类吗？

如果我尝试使用单元测试来调用此方法，则运行正常。

Is it because of the reason that I am trying to return an abstract class?
It runs fine if I try to call this method using unit test.

推荐答案

是的，问题是您的抽象基类需要使用KnownType和XmlInclude属性进行装饰。请参阅： http：// geekswithblogs。 net / ugandadotnet / archive / 2008/05/27 / serializing-an-abstract-data-contract.aspx

Yes, the problem is your abstract base class which needs to be decorated with the KnownType and XmlInclude attributes. See here: http://geekswithblogs.net/ugandadotnet/archive/2008/05/27/serializing-an-abstract-data-contract.aspx

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