用角色注册路线 [英] register route with character

问题描述

我有2种方法的控制器，具有以下签名:

I have controller with 2 methods, with following signature:

public class TestController
{
    [HttpGet]
    public ActionResult TestMethod1()
    {
        //here code
        return Json(1, JsonRequestBehavior.AllowGet);
    }

    [HttpGet]
    public ActionResult TestMethod2(long userId)
    {
        //here code
        return Json("userId= " + userId, JsonRequestBehavior.AllowGet);
    }
}

我想为此方法创建以下路由器:

I want to create the following routers for this methods:

1. 对于第一种方法:

1. For the first method:

http://domain/test/

对于第二种方法:

http://domain/test?userId = {userId_value}

我尝试使用以下路线:

1.

context.MapRoute("route_with_value",
        "test/{userId}",
        new { controller = "test", action = "TestMethod2" });

context.MapRoute("route_no_value",
        "test",
        new { controller = "test", action = "TestMethod1" });

但是这种方式对我不起作用

but this way does not work for me

2.

context.MapRoute("route_with_value",
        "test?userId={userId}",
        new { controller = "test", action = "TestMethod2" });

context.MapRoute("route_no_value",
        "test",
        new { controller = "test", action = "TestMethod1" });

但是我得到了错误:

路由URL不能以'/'或'〜'字符开头，并且不能包含'?'字符.

The route URL cannot start with a '/' or '~' character and it cannot contain a '?' character.

是否可以为我的网址创建地图路线?

Is it possible to create map route for my urls?

推荐答案

内置路由方法不了解查询字符串值.为了让他们知道，您需要构建自定义路线或约束.

The built-in routing methods are unaware of query string values. To make them aware, you need to build custom routes or constraints.

在这种情况下，进行简单的约束将是可行的，因为只要存在查询字符串键就只想运行第一个路由即可.

In this case, making a simple constraint will work since you just want to run the first route whenever the query string key is present.

public class QueryStringParameterConstraint : IRouteConstraint
{
    private readonly string queryStringKeyName;

    public QueryStringParameterConstraint(string queryStringKeyName)
    {
        if (string.IsNullOrEmpty(queryStringKeyName))
            throw new ArgumentNullException("queryStringKeyName");
        this.queryStringKeyName = queryStringKeyName;
    }

    public bool Match(HttpContextBase httpContext, Route route, string parameterName, RouteValueDictionary values, RouteDirection routeDirection)
    {
        if (routeDirection == RouteDirection.IncomingRequest)
        {
            return httpContext.Request.QueryString.AllKeys.Contains(this.queryStringKeyName, StringComparer.OrdinalIgnoreCase);
        }

        return true;
    }
}

用法

context.MapRoute(
    name: "route_with_value",
    url: "test",
    defaults: new { controller = "test", action = "TestMethod2" },
    constraints: new { _ = new QueryStringParameterConstraint("userId") }
);

context.MapRoute(
    name: "route_no_value",
    url: "test",
    defaults: new { controller = "test", action = "TestMethod1" }
);

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