如何在ASP.NET MVC中获取Web应用程序的基本URL？

清疚 2023-03-04 07:00 8阅读 0赞

本文翻译自：[How can I get my webapp's base URL in ASP.NET MVC?][How can I get my webapp_s base URL in ASP.NET MVC]

*How can I quickly determine what the root URL is for my ASP.NET MVC application?* **如何快速确定ASP.NET MVC应用程序的根URL是什么？** *Ie, if IIS is set to serve my application at [http://example.com/foo/bar][http_example.com_foo_bar] , then I'd like to be able to get that URL in a reliable way that doesn't involve getting the current URL from the request and chopping it up in some fragile way that breaks if I re-route my action.* **即，如果将IIS设置为在[http://example.com/foo/bar][http_example.com_foo_bar]上为我的应用程序提供服务，那么我希望能够以一种可靠的方式获取该URL，而无需涉及从URL获取当前URL。请求并以某种易碎的方式将其切碎，如果我重新选择操作路线，则会中断。**

*The reason that I need the base URL is that this web application calls another one that needs the root to the caller web application for callback purposes.* **我需要基本URL的原因是，此Web应用程序调用了另一个需要回叫方Web应用程序的根目录的应用程序。**

--------------------

### \#1楼 ###

参考：[https://stackoom.com/question/5p4W/如何在ASP-NET-MVC中获取Web应用程序的基本URL][https_stackoom.com_question_5p4W_ASP-NET-MVC_Web_URL]

--------------------

### \#2楼 ###

*In Code:* **在代码中：**

Url.Content("~/");

*MVC3 Razor Syntax:* **MVC3 Razor语法：**

@Url.Content("~/")

--------------------

### \#3楼 ###

*This works fine for me (also with a load balancer):* **这对我来说很好（也适用于负载均衡器）：**

@{
        var urlHelper = new UrlHelper(Html.ViewContext.RequestContext);
        var baseurl = urlHelper.Content(“~”);
    }
    
    <script>
        var base_url = "@baseurl";
    </script>

*Especially if you are using non-standard port numbers, using Request.Url.Authority appears like a good lead at first, but fails in a LB environment.* **尤其是如果您使用的是非标准端口号，那么使用Request.Url.Authority乍一看似乎很合适，但在LB环境中失败。**

--------------------

### \#4楼 ###

以下代码段在MVC4中对我来说效果很好，不需要`HttpContext`可用：

System.Web.HttpRuntime.AppDomainAppVirtualPath

--------------------

### \#5楼 ###

*So none of the ones listed here worked for me, but using a few of the answers, I got something working:* **因此，这里列出的所有方法都不适合我，但是使用一些答案，我得到了一些有用的方法：**

public string GetBaseUrl()
    {
        var request = HttpContext.Current.Request;
        var appUrl = HttpRuntime.AppDomainAppVirtualPath;
    
        if (appUrl != "/") 
            appUrl = "/" + appUrl;
    
        var baseUrl = string.Format("{0}://{1}{2}", request.Url.Scheme, request.Url.Authority, appUrl);
    
        return baseUrl;
    }

***Update for ASP.NET Core / MVC 6:*** **ASP.NET Core / MVC 6的更新：**

*`ASP.NET Core` makes this process a bit more painful, especially if you are deep in your code.* **`ASP.NET Core`使此过程更加痛苦，特别是如果您深入了解代码。** *You have 2 options to get at the `HttpContext`* **您有2个选项可以使用`HttpContext`**

*1) Pass it in from your `controller` :* **1）从您的`controller` ：**

var model = new MyClass(HttpContext);

*then in `model` :* **然后在`model` ：**

private HttpContext currentContext;
    
    public MyClass(HttpContext currentContext)
    {
        this.currentContext = currentContext;
    }

*2) Perhaps the cleaner way is to inject it into your class, which starts with registering the types in your `Startup:`* **2）也许更干净的方法是将其注入您的类中，首先在`Startup:`注册类型`Startup:`**

public void ConfigureServices(IServiceCollection services)
    {
        // Add framework services.
        services.AddMvc();
    
        services.AddTransient<MyClass, MyClass>();
        services.TryAddSingleton<IHttpContextAccessor, HttpContextAccessor>();
    }

*then have it injected for you like this:* **然后像这样为您注入它：**

private HttpContext currentContext;
    
    public MyClass(IHttpContextAccessor httpContextAccessor)
    {
        currentContext = httpContextAccessor.HttpContext;
    }

*in either case, here is the updated for `.NET Core` `GetBaseUrl()` :* **无论哪种情况，这都是`.NET Core` `GetBaseUrl()`的更新：**

public string GetBaseUrl()
    {
        var request = currentContext.Request;
    
        var host = request.Host.ToUriComponent();
    
        var pathBase = request.PathBase.ToUriComponent();
    
        return $"{request.Scheme}://{host}{pathBase}";
    }

--------------------

### \#6楼 ###

*You could have a static method that looks at HttpContext.Current and decides which URL to use (development or live server) depending on the host ID.* **您可以有一个静态方法来查看HttpContext.Current并根据主机ID决定使用哪个URL（开发或实时服务器）。** *HttpContext might even offer some easier way to do it, but this is the first option I found and it works fine.* **HttpContext甚至可以提供一些更简单的方法来完成此操作，但这是我发现的第一个选项，并且效果很好。**

[How can I get my webapp_s base URL in ASP.NET MVC]: https://oldbug.net/q/5p4W/How-can-I-get-my-webapp-s-base-URL-in-ASP-NET-MVC
[http_example.com_foo_bar]: http://example.com/foo/bar
[https_stackoom.com_question_5p4W_ASP-NET-MVC_Web_URL]: https://stackoom.com/question/5p4W/%E5%A6%82%E4%BD%95%E5%9C%A8ASP-NET-MVC%E4%B8%AD%E8%8E%B7%E5%8F%96Web%E5%BA%94%E7%94%A8%E7%A8%8B%E5%BA%8F%E7%9A%84%E5%9F%BA%E6%9C%ACURL