JeffreySu/WeiXinMPSDK · error · MessageHandlerException

微信企业号不支持 IResponseMessageMpNews 响应类型

Error message

微信企业号不支持 IResponseMessageMpNews 响应类型

What it means

The WeChat Work (企业号/企业微信) message handler does not support the MpNews response type. WorkMessageEntityEnlightener.NewResponseMessageMpNews() unconditionally throws MessageHandlerException because WeChat Work's message API has no equivalent of the Official Account's mpnews message.

Solutions

1. Replace IResponseMessageMpNews with a supported Work response type such as ResponseMessageNews, ResponseMessageText, or ResponseMessageImage.
2. Guard for platform differences: only create MpNews responses in the MP message handler, not the Work one.
3. If news-style content is needed, send it via a Work API call (e.g. news-type message via Senparc.Weixin.Work message APIs) instead of the passive reply.

Example fix

// before
public override IWorkResponseMessageBase DefaultResponseMessage(IWorkRequestMessageBase rm)
{
    var resp = requestMessageHandler.CreateResponseMessage<IResponseMessageMpNews>();
    ...
}
// after
public override IWorkResponseMessageBase DefaultResponseMessage(IWorkRequestMessageBase rm)
{
    var resp = requestMessageHandler.CreateResponseMessage<IResponseMessageNews>();
    ...
}

if (handler is Senparc.Weixin.Work.MessageHandlers.WorkMessageHandler<>)
{
    // WeChat Work never supports MpNews replies — pick a supported type
    response = handler.CreateResponseMessage<IResponseMessageNews>();
}

bool IsWorkHandler(MessageHandler<DefaultWorkMessageContext> h) => h is Senparc.Weixin.Work.MessageHandlers.WorkMessageHandler<DefaultWorkMessageContext>;

try
{
    resp = handler.CreateResponseMessage<IResponseMessageMpNews>();
}
catch (MessageHandlerException)
{
    resp = handler.CreateResponseMessage<IResponseMessageNews>();
}

When it happens

Trigger: Calling NewResponseMessageMpNews() on a WorkMessageHandler's entity enlightener, e.g. inside an overridden DefaultResponseMessage or an OnXxxRequest handler when building an IResponseMessageMpNews reply.

Common situations: Developers porting code written for the WeChat Official Account (Senparc.Weixin.MP) to WeChat Work and reusing the same response-type factory pattern; MpNews exists only on MP.

Understand the failure class

Background: UnsupportedOperationException and "is not supported" errors: when a library deliberately refuses a call — this error's family across 30 libraries.

Related errors

• 微信企业号不支持 IResponseMessageMusic 响应类型
• 微信企业号不支持 IResponseMessageTransfer_Customer_Service 响应类型
• 微信企业号不支持 IRequestMessageMiniProgramPage 响应类型
• 微信公众号不支持 IResponseMessageImage 响应类型
• 微信公众号不支持 IResponseMessageMpNews 响应类型

AI-assisted analysis of JeffreySu/WeiXinMPSDK@be573f6f94 (2026-09-12). Data as JSON: /api/errors/14f66ff7d4a6e8ef. Report an issue: GitHub.

Appendix: source

Thrown at src/Senparc.Weixin.Work/Senparc.Weixin.Work/MessageHandlers/WorkMessageEntityEnlightener.cs:71

        public override IRequestMessageVideo NewRequestMessageVideo()
        {
            return new RequestMessageVideo();
        }

        public override IRequestMessageVoice NewRequestMessageVoice()
        {
            return new RequestMessageVoice();
        }

        public override IResponseMessageImage NewResponseMessageImage()
        {
            return new ResponseMessageImage();
        }

        public override IResponseMessageMpNews NewResponseMessageMpNews()
        {
            throw new MessageHandlerException("微信企业号不支持 IResponseMessageMpNews 响应类型");
        }

        public override IResponseMessageMusic NewResponseMessageMusic()
        {
            throw new MessageHandlerException("微信企业号不支持 IResponseMessageMusic 响应类型");
        }

        public override IResponseMessageNews NewResponseMessageNews()
        {
            return new ResponseMessageNews();
        }

        public override IResponseMessageText NewResponseMessageText()
        {
            return new ResponseMessageText();
        }

        public override IResponseMessageTransfer_Customer_Service NewResponseMessageTransfer_Customer_Service()

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