C# WCF中的远程主机强制关闭了现有连接
我有一个名为“Template”的抽象类,定义为:C# WCF中的远程主机强制关闭了现有连接,c#,.net,wcf,exception-handling,C#,.net,Wcf,Exception Handling,我有一个名为“Template”的抽象类,定义为: [DataContract] public abstract class Template { [DataMember] public virtual int? Id { get; set; } [DataMember] public virtual string Title { get; set; } [DataMember] public virtual byte[] TemplateDoc
[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; }
}
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;
}
}
两个派生类:UserTemplate和SystemTemplate实现上述抽象类,定义如下:
[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; }
}
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时:
List<Template> GetTemplatesByTemplateType(int officeId, int? userId, TemplateType templateType)
列出GetTemplatesByTemplateType(int-officeId、int-userId、TemplateType-TemplateType)
我得到这个错误:
System.Net.Sockets.SocketException:远程主机强制关闭了现有连接
是因为我试图返回抽象类的原因吗?如果我尝试使用单元测试调用此方法,则运行良好。是的,问题在于抽象基类需要使用KnownType和XmlInclude属性修饰。请参见此处:除了格林纳达关于使用
KnownType
(或ServiceKnownType
)属性使WCF知道这些后代类的答案之外,您还必须使用[DataContract]
属性本身来装饰后代类
[DataContract]
public class UserTemplate : Template
{
......
}
[DataContract]
public class SystemTemplate : Template
{
......
}
在WCF中,这些属性几乎从未从父级继承到子级-您需要在每个级别都非常明确和清楚地表达您的意图
有关KnownTypes和ServiceKnownTypes属性的更多信息,请查看此博客文章。在web配置文件中添加此datacontractserializer行
<system.serviceModel>
<behaviors>
<serviceBehaviors>
<behavior >
**<dataContractSerializer maxItemsInObjectGraph="2147483646"/>**
</behavior >
</serviceBehaviors>
</behaviors>
</system.serviceModel>
****
我曾经遇到过这个错误,它让人很困惑。我的问题是,由于某些原因,服务引用不是最新的,因此更新服务引用会有所帮助