使用WebGet的可选UriTemplate参数

fib*_*ics 23 c# rest wcf

我试过这些

WCF服务URI模板中的可选参数?Kamal Rawat在博客中发表| 2012年9月4日的.NET 4.5本节介绍如何在WCF Servuce URI inShare中传递可选参数

WCF中URITemplate中的可选查询字符串参数

但没有什么对我有用.这是我的代码:

    [WebGet(UriTemplate = "RetrieveUserInformation/{hash}/{app}")]
    public string RetrieveUserInformation(string hash, string app)
    {

    }
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如果填充参数,它可以工作:

https://127.0.0.1/Case/Rest/Qr/RetrieveUserInformation/djJUd9879Hf8df/Apple  
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但如果app没有价值 就行不通

https://127.0.0.1/Case/Rest/Qr/RetrieveUserInformation/djJUd9879Hf8df  
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我想做app可选的.怎么做到这一点?
这是app没有值时的错误:

Endpoint not found. Please see the service help page for constructing valid requests to the service.  
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car*_*ira 49

此方案有两种选择.您可以*{app}参数中使用通配符(),这意味着"URI的其余部分"; 或者您可以为{app}零件指定一个默认值,如果它不存在,将使用该值.

您可以在http://msdn.microsoft.com/en-us/library/bb675245.aspx上查看有关URI模板的更多信息,下面的代码显示了两种替代方案.

public class StackOverflow_15289120
{
    [ServiceContract]
    public class Service
    {
        [WebGet(UriTemplate = "RetrieveUserInformation/{hash}/{*app}")]
        public string RetrieveUserInformation(string hash, string app)
        {
            return hash + " - " + app;
        }
        [WebGet(UriTemplate = "RetrieveUserInformation2/{hash}/{app=default}")]
        public string RetrieveUserInformation2(string hash, string app)
        {
            return hash + " - " + app;
        }
    }
    public static void Test()
    {
        string baseAddress = "http://" + Environment.MachineName + ":8000/Service";
        WebServiceHost host = new WebServiceHost(typeof(Service), new Uri(baseAddress));
        host.Open();
        Console.WriteLine("Host opened");

        WebClient c = new WebClient();
        Console.WriteLine(c.DownloadString(baseAddress + "/RetrieveUserInformation/dsakldasda/Apple"));
        Console.WriteLine();

        c = new WebClient();
        Console.WriteLine(c.DownloadString(baseAddress + "/RetrieveUserInformation/dsakldasda"));
        Console.WriteLine();

        c = new WebClient();
        Console.WriteLine(c.DownloadString(baseAddress + "/RetrieveUserInformation2/dsakldasda"));
        Console.WriteLine();

        Console.Write("Press ENTER to close the host");
        Console.ReadLine();
        host.Close();
    }
}
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