在行为中抛出错误并将其返回给客户端

发布于 2024-10-19 09:57:38 字数 848 浏览 4 评论 0原文

我正在 WCF 中编写一些由 Silverlight 客户端调用的服务。每次返回错误时，我都会通过 IDispatchMessageInspector 将状态代码更改为 200。

它工作得几乎完美，但有时它会不断返回错误 500：NotFound。

我刚刚编写了另一个 IDispatchMessageInspector 来提交 ObjectContext 中的更改。但是当失败时，不会调用错误处理程序。

我认为在 UnitOfWorkMessageInspector 运行时，该消息已被设置为非故障响应。我怎样才能让这两件事都发挥作用？

    public class UnitOfWorkMessageInspector : IDispatchMessageInspector
    {
        public void BeforeSendReply(ref Message reply, object correlationState)
        {
            if (!reply.IsFault)
            {
                try
                {
                    UnitOfWorkBase.Commit();
                }
                catch (OptimisticConcurrencyException)
                {
                    throw new FaultException("It was changed by another user. Try again.");
                }
            }
        }

原文

I'm writing some services in WCF to be called by a Silverlight client. I change status code to 200 every time a fault is to be returned, via a IDispatchMessageInspector.

It works almost perfect, but sometimes it keeps returning error 500: NotFound.

I have just written another IDispatchMessageInspector to commit changes in a ObjectContext. But when this fails, the error handler is not called.

I think by the time UnitOfWorkMessageInspector runs, the message was already been set up as a non-fault-response. How can I do both things work?

    public class UnitOfWorkMessageInspector : IDispatchMessageInspector
    {
        public void BeforeSendReply(ref Message reply, object correlationState)
        {
            if (!reply.IsFault)
            {
                try
                {
                    UnitOfWorkBase.Commit();
                }
                catch (OptimisticConcurrencyException)
                {
                    throw new FaultException("It was changed by another user. Try again.");
                }
            }
        }

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青春有你 2024-10-26 09:57:38

代码 500 是内部错误。

发生了一些错误，但服务器端未捕获该错误。

在您的代码中，您只捕获 OptimisticConcurrencyException，您还需要捕获 Exception。

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我纯我任性 2024-10-26 09:57:38

我设法让它发挥作用。我发现我的 IDispatchMessageInspector 从状态代码 500 切换到 200 不起作用，因为消息已经构建，然后我替换了该消息。

    public class UnitOfWorkMessageInspector : IDispatchMessageInspector
    {
        public void BeforeSendReply(ref Message reply, object correlationState)
        {
            if (!reply.IsFault)
            {
                try
                {
                    UnitOfWorkBase.Commit();
                }
                catch (OptimisticConcurrencyException)
                {
                    FaultException fe = new FaultException("It was changed by another user. Try again.");
                    reply = Message.CreateMessage(reply.Version, fe.CreateMessageFault(), fe.Action);
                }
            }
        }

I managed to make it work. I figured out my IDispatchMessageInspector for switching from status code 500 to 200 wouldn't work because the message was already built, then I replaced the message.

    public class UnitOfWorkMessageInspector : IDispatchMessageInspector
    {
        public void BeforeSendReply(ref Message reply, object correlationState)
        {
            if (!reply.IsFault)
            {
                try
                {
                    UnitOfWorkBase.Commit();
                }
                catch (OptimisticConcurrencyException)
                {
                    FaultException fe = new FaultException("It was changed by another user. Try again.");
                    reply = Message.CreateMessage(reply.Version, fe.CreateMessageFault(), fe.Action);
                }
            }
        }

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