C# WCF Rest序列化失败时的自定义WebFaultException？

对于这样的对象：

[DataContract]
public class SampleItem
{              
    private int _id;

    [DataMember(IsRequired = true)]
    public int Id
    {
        get { return _id; }
        set { _id = value; }
    }

    private string _stringValue;

    [DataMember()]
    public string StringValue
    {
        get { return _stringValue; }
        set { _stringValue = value; }
    }

[WebInvoke(UriTemplate = "", Method = "POST")]        
public SampleItem Create(SampleItem instance)
{
    if (instance == null)
        throw new WebFaultException<string>("The SampleItem returned wasn't correctly formatted.",
                                            HttpStatusCode.BadRequest);               

    return instance;
}        

<SampleItem xmlns="http://schemas.datacontract.org/2004/07/UserWebServices" xmlns:i="http://www.w3.org/2001/XMLSchema-instance"><StringValue>SingleItem</StringValue></SampleItem>

catch (Exception ex)
        {
            throw new WebProtocolException(HttpStatusCode.InternalServerError, "Unexpected Error.", new ServiceFault { ExceptionDetail = "Your custom error message here" }, null);
        }

还有这样的休息电话：

[DataContract]
public class SampleItem
{              
    private int _id;

    [DataMember(IsRequired = true)]
    public int Id
    {
        get { return _id; }
        set { _id = value; }
    }

    private string _stringValue;

    [DataMember()]
    public string StringValue
    {
        get { return _stringValue; }
        set { _stringValue = value; }
    }

[WebInvoke(UriTemplate = "", Method = "POST")]        
public SampleItem Create(SampleItem instance)
{
    if (instance == null)
        throw new WebFaultException<string>("The SampleItem returned wasn't correctly formatted.",
                                            HttpStatusCode.BadRequest);               

    return instance;
}        

<SampleItem xmlns="http://schemas.datacontract.org/2004/07/UserWebServices" xmlns:i="http://www.w3.org/2001/XMLSchema-instance"><StringValue>SingleItem</StringValue></SampleItem>

catch (Exception ex)
        {
            throw new WebProtocolException(HttpStatusCode.InternalServerError, "Unexpected Error.", new ServiceFault { ExceptionDetail = "Your custom error message here" }, null);
        }

[WebInvoke（UriTemplate=”“，Method=“POST”）]
公共SampleItem创建（SampleItem实例）
{
if（实例==null）
抛出新的WebFaultException（“返回的SampleItem格式不正确。”，
HttpStatusCode.BadRequest）；
返回实例；
}        

如果我使用无效的SampleItem调用它，请说出一些没有ID的内容，如下所示：

[DataContract]
public class SampleItem
{              
    private int _id;

    [DataMember(IsRequired = true)]
    public int Id
    {
        get { return _id; }
        set { _id = value; }
    }

    private string _stringValue;

    [DataMember()]
    public string StringValue
    {
        get { return _stringValue; }
        set { _stringValue = value; }
    }

[WebInvoke(UriTemplate = "", Method = "POST")]        
public SampleItem Create(SampleItem instance)
{
    if (instance == null)
        throw new WebFaultException<string>("The SampleItem returned wasn't correctly formatted.",
                                            HttpStatusCode.BadRequest);               

    return instance;
}        

<SampleItem xmlns="http://schemas.datacontract.org/2004/07/UserWebServices" xmlns:i="http://www.w3.org/2001/XMLSchema-instance"><StringValue>SingleItem</StringValue></SampleItem>

catch (Exception ex)
        {
            throw new WebProtocolException(HttpStatusCode.InternalServerError, "Unexpected Error.", new ServiceFault { ExceptionDetail = "Your custom error message here" }, null);
        }

SingleItem

然后服务器返回400（正确），没有有用的错误信息（我得到的只是：服务器在处理请求时遇到错误。有关详细信息，请参阅服务器日志）。理想情况下，我希望它说像ID这样的东西是必需的

---

如何拦截生成此错误的位置并抛出我自己的WebFaultException？

从中查看WebProtocolException。然后，您可以在异常中发回自定义错误消息，如下所示：

[DataContract]
public class SampleItem
{              
    private int _id;

    [DataMember(IsRequired = true)]
    public int Id
    {
        get { return _id; }
        set { _id = value; }
    }

    private string _stringValue;

    [DataMember()]
    public string StringValue
    {
        get { return _stringValue; }
        set { _stringValue = value; }
    }

[WebInvoke(UriTemplate = "", Method = "POST")]        
public SampleItem Create(SampleItem instance)
{
    if (instance == null)
        throw new WebFaultException<string>("The SampleItem returned wasn't correctly formatted.",
                                            HttpStatusCode.BadRequest);               

    return instance;
}        

<SampleItem xmlns="http://schemas.datacontract.org/2004/07/UserWebServices" xmlns:i="http://www.w3.org/2001/XMLSchema-instance"><StringValue>SingleItem</StringValue></SampleItem>

catch (Exception ex)
        {
            throw new WebProtocolException(HttpStatusCode.InternalServerError, "Unexpected Error.", new ServiceFault { ExceptionDetail = "Your custom error message here" }, null);
        }

---

是的，这很好，但我不知道在哪里捕获反序列化异常，因为如果抛出反序列化异常，我永远不会将其到达Create主体。这只有在您使用REST初学者工具包中的工厂托管服务时才有效，不是吗？WebServiceHost2工厂。因此，我认为如果您需要使用标准的WebServiceHostFactory托管服务（例如，如果您想使用WCF 4中的标准帮助功能），那么这将不起作用。Rest初学者工具包确实包含一个帮助功能，但它没有WCF 4（IMO）中的功能好。