WCF DataMember在客户端不可用或不可见我做错了什么？ [英] WCF DataMember not available or visible in Client what am I doing wrong?

问题描述

我无法从winforms WCF客户端看到属于DataService类的DataMember ..数据，我可以执行操作并且工作正常 - 我只是看不到这个DataMember对象{datas};我做错了什么？



下面是示例代码：

 [DataContract] 
 [ServiceBehavior（InstanceContextMode = InstanceContextMode。 Single ）] 
  public  类 DataService：IDataService 
 { //  在支持领域也尝试了这个[DataMember]。  
 BindingList< Data> m_datas; 
 [DataMember] 
  public  BindingList< Data>数据
 {
 获取 
 {
 如果（ 此 .m_datas ==  null ）
 {
  this  .m_datas =  new  BindingList< Data>（）; 
} 
 返回 此 .m_datas; 
} 
  set  
 {
 m_datas =  value  ; 
} 
} 
} 

我的界面是

< pre lang =c＃> [ServiceContract]
public interface IDataService
{
[OperationContract]
BindingList< Data>的GetData（）;
}

[DataContract]
public class 数据
{
[DataMember]
public string name;
}

我想这样做的原因;是我有一个不断运行和监控的服务 - 它然后更新这个内部对象列表，然后我希望我的客户端显示实时更新 - 我可以使用GetData显示数据，但这需要我处理这一切列表在服务中更改的时间。有没有更好的方法呢？

解决方案

你想在哪里访问数据您的服务属性？它是在客户端吗？如果是这样，看起来对事物的运作方式有一点误解。

当你为你的服务创建一个客户端时（使用ChannelFactory 或添加服务引用），它创建一个实现 ServiceContract 的对象（在你的情况下： IDataService ）并包含 OperationContract 的实现 - 没有转移任何属性。

如果你想要获得 datas 的值，你应该实现 GetData 来返回它。您应该将数据（ Data ）声明为 DataContract （不是服务...）

I cannot see the DataMember .. datas belonging to the DataService class from my winforms WCF Client, I can do the operations and that works fine - I just cannot see this DataMember object {datas} ; what am I doing wrong?

Below is the example code:

    [DataContract]
    [ServiceBehavior(InstanceContextMode = InstanceContextMode.Single)]
    public class DataService : IDataService  
    {   // have tried this too [DataMember] on backing field. 	
        BindingList<Data> m_datas;        
        [DataMember]
	public BindingList<Data> datas 
	{
		get 
		{
		  if (this.m_datas == null) 
		  {
		     this.m_datas = new BindingList<Data>();
		  }
		    return this.m_datas;
		}
		set 
		{
		   m_datas = value;
		}
	}
}

My interface is

[ServiceContract]
public interface IDataService
{
	[OperationContract]
	BindingList<Data> GetData();
}

[DataContract]
public class Data
{
   [DataMember]
   public string name;
}

The reason I want to do this; is that I have a service that is constantly running and monitoring - it then updates this internal list of objects, which I then want my client to show real time updates - I can show the data by using GetData but this requires me to handle this all the time whenever the list changes in the service. Isn't there a better way to do this ?

解决方案

Where do you want to access the datas property of your service? Does it in the client side? If so, It looks like there is a little misunderstanding of how the things works.

When you create a client to your service (using ChannelFactory or Add Service Reference), it creates an object that implements your ServiceContract (in your case: IDataService) and contains implementation for your OperationContracts - No properties are transfered.

If you want to get the value of datas, you should implement GetData to return it. You should declare the data (Data) as a DataContract (not the service...)

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