C# 使用 WebGet 的可选 UriTemplate 参数
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原文地址: http://stackoverflow.com/questions/15289120/
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Optional UriTemplate parameter using WebGet
提问by fiberOptics
I have tried these
我试过这些
and
和
Optional query string parameters in URITemplate in WCF
But nothing works for me. Here is my code:
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)
{
}
It works if the parameters are filled up:
如果参数被填满，它会起作用：
https://127.0.0.1/Case/Rest/Qr/RetrieveUserInformation/djJUd9879Hf8df/Apple
But doesn't work if apphas no value
但如果app没有价值 就不起作用
https://127.0.0.1/Case/Rest/Qr/RetrieveUserInformation/djJUd9879Hf8df
I want to make appoptional. How to achieve this?
Here is the error when apphas no value:
我想成为app可选的。如何实现这一目标？
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.
采纳答案by carlosfigueira
You have two options for this scenario. You can either use a wildcard (*) in the {app}parameter, which means "the rest of the URI"; or you can give a default value to the {app}part, which will be used if it's not present.
对于这种情况，您有两种选择。您可以*在{app}参数中使用通配符 ( ) ，表示“URI 的其余部分”；或者您可以为{app}零件提供一个默认值，如果它不存在，则将使用该默认值。
You can see more information about the URI Templates at http://msdn.microsoft.com/en-us/library/bb675245.aspx, and the code below shows both alternatives.
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();
}
}
回答by Bahaa
A complementary answer regarding default values in UriTemplates using query parameters. The solution proposed by @carlosfigueira works only for path segment variables according to the docs.
关于UriTemplate使用查询参数的 s 中的默认值的补充答案。@carlosfigueira 提出的解决方案仅适用于根据文档的路径段变量。
Only path segment variables are allowed to have default values. Query string variables, compound segment variables, and named wildcard variables are not permitted to have default values.
仅允许路径段变量具有默认值。查询字符串变量、复合段变量和命名通配符变量不允许具有默认值。
