将 Web 服务与 EF 一起使用时的异常
我在调用我的网络服务时遇到此异常。我在我的服务中使用 EF 并尝试返回由 EF 创建的 POCO 类。有什么想法吗？
System.Web.Services.Protocols.SoapException：服务器无法 处理请求。 ---> System.InvalidOperationException：有 生成 XML 文档时出错。 ---> System.InvalidOperationException：类型 System.Data.Entity.DynamicProxies.Job_3C04107CB03F22888B19EF7537A795C816D03441852DC37A42729E7542384BBE 没想到。使用 XmlInclude 或 SoapInclude 属性 指定静态未知的类型。在 Microsoft.Xml.Serialization.GenerateAssembly.XmlSerializationWriter1.Write2_Job（字符串 n、字符串 ns、作业 o、布尔值 isNullable、布尔值 needType) at Microsoft.Xml.Serialization.GenerateAssembly.XmlSerializationWriter1.Write9_GetJobByNumberResponse(对象[] p) 在 Microsoft.Xml.Serialization.GenerateAssembly.ArrayOfObjectSerializer13.Serialize（对象 objectToSerialize，XmlSerializationWriter 编写器）位于 System.Xml.Serialization.XmlSerializer.Serialize(XmlWriter xmlWriter, 对象 o、XmlSerializerNamespaces 命名空间、字符串编码样式、 String id) --- 内部异常堆栈跟踪结束 --- at System.Xml.Serialization.XmlSerializer.Serialize(XmlWriter xmlWriter, 对象 o、XmlSerializerNamespaces 命名空间、字符串编码样式、 字符串 ID）位于 System.Web.Services.Protocols.SoapServerProtocol.WriteReturns(对象[] returnValues，流输出流）在 System.Web.Services.Protocols.WebServiceHandler.WriteReturns（对象[] 返回值）在 System.Web.Services.Protocols.WebServiceHandler.Invoke() --- 结束 内部异常堆栈跟踪 ---
好吧，我发现一篇文章提到将 ProxyCreationEnabled 属性设置为 false；我已经这样做了，现在效果很好。将此属性设置为 false 会产生什么连锁反应
I'm getting this exception when calling my web service. I'm using EF in my service and trying to return a POCO class created by EF. Any ideas??
System.Web.Services.Protocols.SoapException: Server was unable to
process request. ---> System.InvalidOperationException: There
was an error generating the XML document. --->
System.InvalidOperationException: The type
System.Data.Entity.DynamicProxies.Job_3C04107CB03F22888B19EF7537A795C816D03441852DC37A42729E7542384BBE
was not expected. Use the XmlInclude or SoapInclude attribute to
specify types that are not known statically. at
Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriter1.Write2_Job(String
n, String ns, Job o, Boolean isNullable, Boolean needType) at
Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriter1.Write9_GetJobByNumberResponse(Object[]
p) at
Microsoft.Xml.Serialization.GeneratedAssembly.ArrayOfObjectSerializer13.Serialize(Object
objectToSerialize, XmlSerializationWriter writer) at
System.Xml.Serialization.XmlSerializer.Serialize(XmlWriter xmlWriter,
Object o, XmlSerializerNamespaces namespaces, String encodingStyle,
String id) --- End of inner exception stack trace --- at
System.Xml.Serialization.XmlSerializer.Serialize(XmlWriter xmlWriter,
Object o, XmlSerializerNamespaces namespaces, String encodingStyle,
String id) at
System.Web.Services.Protocols.SoapServerProtocol.WriteReturns(Object[]
returnValues, Stream outputStream) at
System.Web.Services.Protocols.WebServiceHandler.WriteReturns(Object[]
returnValues) at
System.Web.Services.Protocols.WebServiceHandler.Invoke() --- End of
inner exception stack trace ---
ok i found a post that mentioned setting the ProxyCreationEnabled property to false; Ive done this and now it works fine. Whats the knock on effect of setting this property to false
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您需要在 EF 上下文上禁用延迟加载和代理创建，否则您的 POCO 作为异常状态实际上是一个无法序列化的
DynamicProxy。本文（存档此处）将提供更多信息。
You need to disable lazy loading and proxy creation on the EF context otherwise your POCO as the exception states is actually a
DynamicProxywhich cannot be serialised.This article (archived here) will provide a little more info.