WCF中URITemplate中的可选查询字符串参数? [英] Optional query string parameters in URITemplate in WCF?

问题描述

我正在WCF 4.0中开发一些RESTful服务.我有如下方法:

I'm developing some RESTful services in WCF 4.0. I've got a method as below:

[OperationContract]
    [WebGet(UriTemplate = "Test?format=XML&records={records}", ResponseFormat=WebMessageFormat.Xml)]
    public string TestXml(string records)
    {
        return "Hello XML";
    }

因此，如果我将浏览器导航到 http://localhost:8000/Service/Test?format = XML& records = 10 ，那么一切都按已运行的方式进行.

So if i navigate my browser to http://localhost:8000/Service/Test?format=XML&records=10, then everything works as exepcted.

但是，我希望能够导航到 http://localhost:8000/Service/测试?format = XML 并忽略URL的& records = 10"部分.但是现在，由于URI与预期的URI模板不匹配，我收到了服务错误.

HOWEVER, i want to be able to navigate to http://localhost:8000/Service/Test?format=XML and leave off the "&records=10" portion of the URL. But now, I get a service error since the URI doesn't match the expected URI template.

那么如何为某些查询字符串参数实现默认值?我想将记录"默认设置为10(例如，如果该部分不包含在查询字符串中).

So how do I implement defaults for some of my query string parameters? I want to default the "records" to 10 for instance if that part is left off the query string.

推荐答案

注意:该问题已过时，请参阅其他答案.

这似乎不受支持.

但是，Microsoft已经意识到此问题，并且有一种解决方法:

However, Microsoft has been made aware of this issue and there is a work-around:

您可以通过以下方式获得所需的效果 从中省略查询字符串 WebGet上的UriTemplate或 WebInvoke属性，并使用 WebOperationContext.Current.IncomingRequest.UriTemplateMatch.QueryParameters 从您的处理人员内部进行检查， 在查询上设置默认值等 参数.

You can get the desired effect by omitting the Query string from the UriTemplate on your WebGet or WebInvoke attribute, and using WebOperationContext.Current.IncomingRequest.UriTemplateMatch.QueryParameters from within your handlers to inspect, set defaults, etc. on the query parameters.

https://connect.microsoft.com/VisualStudio/feedback/details/451296/

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