发送从ObservableCollection继承的Collection时出错. [英] Error sending Collection inherited from ObservableCollection<>

问题描述

大家好

我想使用WCF将这样的类发送给客户端

[DataContract]
[KnownType("GetKnownType")]
公共类MyCollection< T> :ObservableCollection< T>其中T:myEntity，new()
{
[DataMember]
private List< T>删除；

其他东西.....

私有静态Type [] GetKnownType()
{
Type [] t = new Type [1];
t [0] = typeof(ObservableCollection) ;
}

}

但是当服务器尝试发送集合时，会引发此异常

运行时遇到致命错误.错误的地址在线程0xa5c上的0x50204fd8处.错误代码为0x80131623.此错误可能是CLR或用户代码中不安全或不可验证的部分中的错误.该错误的常见来源包括COM-interop或PInvoke的用户封送处理错误，这些错误可能会破坏堆栈.

如果我像这样更改班级:

[DataContract]
公共类MyList< T> :INotifyPropertyChanged其中T:myEntity，new()
{
[DataMember]
私有ObservableCollection< T>项目；

[DataMember]
私有列表< T>删除；

然后，我可以毫无问题地发送收藏集.

我想念什么?

谢谢

解决方案

此博客为该主题带来了很多亮点

http://kentb.blogspot.com/2007/11/serializing-observablecollection.html

Hi all

I want to send a class like this to a client, using WCF 

  [DataContract] 
  [KnownType("GetKnownType")]
    public class MyCollection<T> :ObservableCollection<T> where T : myEntity, new()
    {
        [DataMember]
        private List<T> deleted;

        other stuff .....

         private static Type[] GetKnownType()
         {
            Type[] t = new Type[1];
             t[0] = typeof(ObservableCollection<T>);
             return t;
         }

      }

but when the server try to send the collection raise this exception

The runtime has encountered a fatal error. The address of the error was at 0x50204fd8, on thread 0xa5c. The error code is 0x80131623. This error may be a bug in the CLR or in the unsafe or non-verifiable portions of user code. Common sources of this bug include user marshaling errors for COM-interop or PInvoke, which may corrupt the stack.

If i change the class like this:

[DataContract]
    public class MyList<T> :INotifyPropertyChanged where T :myEntity , new()
    {
        [DataMember]
        private ObservableCollection<T> items;

        [DataMember]
        private List<T> deleted;

then, i can send  the Collection without problems. 

What i am missing?

Thanks

 

    

 

 

解决方案

This blog throws good amount of light on this topic

http://kentb.blogspot.com/2007/11/serializing-observablecollection.html

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