破折号路线值 [英] Route value with dashes

问题描述

我有这样的路线：

  routes.MapRoute（
            新闻，
            新闻/ {ID}  -  {}别名，
            新{控制器=新闻，行动=显示}，
            新
                {
                    ID = @^ [0-9] + $
                }，
            命名空间：新[] {Site.Controllers}
        ）;
 

这条航线的网址是这样工作的：

 的http：//本地主机：54010 /新闻/ 6-新闻
 

但不工作的网址是这样的：

 的http：//本地主机：54010 /新闻/ 6-不错新闻
 

如何在我的路线值别名使用破折号？

EDITED

路线是这样的：

 新闻/ {ID} _ {}别名
 

适用于这两个网址：

 的http：//本地主机：54010 /新闻/ 6_news
HTTP：//本地主机：54010 /新闻/ 6_nice新闻
 

解决方案

问题是与你的格局：新闻/ {ID} - {化名} ，因为定线制是解析模式贪婪。

于是网址的http：//本地主机：54010 /新闻/ 6-新闻生成以下标记：

  ID = 6，别名=新闻
 

但的http：//本地主机：54010 /新闻/ 6-漂亮的新闻生成以下标记：

  ID = 6-不错，别名=新闻
 

以及 ID = 6-不错标记将失败你的路由约束实现 @^ [0-9] + $。所以你会得到404

现在有那么你有以下几种选择方式来配置MVC的这种行为：

1. 使用的东西比其他破折号。正如你指出结合破折号和连字符的作品。


2. 以弗莱姆方法，并分析你的控制器动作里面的ID和别名内


3. 您可以创建自定义路线这将重新解析。如转化 ID = 6-不错，别名为新闻到 ID = 6，别名为新闻不错

我会告诉你一个原始（没有任何错误处理或良好的编码习惯！）执行选项3，让你开始。

所以，你需要从路线继承：

 公共类MyRoute：路线
{
    公共MyRoute（字符串URL，
        RouteValueDictionary默认值，
        RouteValueDictionary的限制，
        RouteValueDictionary dataTokens）
        ：基地（URL，默认，约束，dataTokens，新MvcRouteHandler（））
    {
    }    保护覆盖布尔ProcessConstraint（HttpContextBase HttpContext的，
        对象约束，字符串参数名称，RouteValueDictionary价值，
        RouteDirection routeDirection）
    {
        VAR部分=（（字符串）值[ID]）斯普利特（' - '）。
        如果（parts.Length→1）
        {
            值[ID] =零件[0];
            值[别名] = //建立别名部分
                的string.join（ - ，parts.Skip（1））+ - +值[别名];
        }
        VAR processConstraint = base.ProcessConstraint（HttpContext的，约束
            参数名称，价值，routeDirection）;
        返回processConstraint;
    }
}
 

然后你只需要注册您的路线：

  routes.Add（新闻报，
            新MyRoute（新闻/ {ID}  -  {}别名，
            新RouteValueDictionary（新{控制器=新闻，行动=显示}）
            新RouteValueDictionary（新
                                        {
                                             ID = @^ [0-9] + $
                                        }），
            新RouteValueDictionary（）））;
 

I have this route:

            routes.MapRoute(
            "News",
            "News/{id}-{alias}",
            new { controller = "News", action = "Show" },
            new
                {
                    id = @"^[0-9]+$"
                },
            namespaces: new[] { "Site.Controllers" }
        );

This route working for url's like this:

http://localhost:54010/News/6-news

But not working for url's like this:

http://localhost:54010/News/6-nice-news

How use dashes in my route value "alias"?

EDITED

Route like this:

"News/{id}_{alias}"

works for both url's:

http://localhost:54010/News/6_news
http://localhost:54010/News/6_nice-news

解决方案

The problem is with your pattern: News/{id}-{alias} because the Routeing is parsing the patterns greedily.

So the url http://localhost:54010/News/6-news generates the following tokens:

id = 6, alias = news

But the http://localhost:54010/News/6-nice-news generates the following tokens:

id = 6-nice, alias = news

And the id = 6-nice token will fail your routing contraint @"^[0-9]+$". so you will get 404.

There is now way to configure this behavior of MVC so you have the following options:

1. Use something else than dashes. As you noted combining dashes and hyphens works.
2. Take flem approach and parse inside the id and alias inside your controller action
3. You can create a custom Route which will take of the re-parsing. E.g transforming id = 6-nice, alias = news to id = 6, alias = news-nice

I will show you a raw (without any error handling or good coding practices!) implementation of the option 3 to get you started.

So you need to inherit from Route:

public class MyRoute : Route
{
    public MyRoute(string url, 
        RouteValueDictionary defaults, 
        RouteValueDictionary constraints, 
        RouteValueDictionary dataTokens) 
        : base(url, defaults, constraints, dataTokens, new MvcRouteHandler())
    {
    }

    protected override bool ProcessConstraint(HttpContextBase httpContext, 
        object constraint, string parameterName, RouteValueDictionary values, 
        RouteDirection routeDirection)
    {
        var parts = ((string) values["id"]).Split('-');
        if (parts.Length > 1)
        {
            values["id"] = parts[0];
            values["alias"] = // build up the alias part
                string.Join("-", parts.Skip(1)) + "-" + values["alias"];
        }
        var processConstraint = base.ProcessConstraint(httpContext, constraint, 
            parameterName, values, routeDirection);
        return processConstraint;
    }
}

Then you just need to register your route:

routes.Add("News",
            new MyRoute("News/{id}-{alias}",
            new RouteValueDictionary(new {controller = "News", action = "Show"}),
            new RouteValueDictionary(new
                                        {
                                             id = @"^[0-9]+$"
                                        }),
            new RouteValueDictionary()));

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