Question 246898 in ASP.NET Question posted in
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Asp.net – Get bound URLs from within a Razor view

I’d like to display my web server’s bound URLs from within a Razor Pages view. I can access them from within Main like so:

    var builder = WebApplication.CreateBuilder(args);
    //...
    var app = builder.Build();
    //...
    await app.StartAsync();
    //...
    // Debug here...

… by having a breakpoint at "Debug here" and examining app.Urls (app is a Microsoft.AspNetCore.Builder.WebApplication), but I can’t add this during the DI configuration because it only gets populated after StartAsync. How, then, can I get access to this information from within a Razor Pages view running from within that web application?

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2

Answers


  1. 0

    To display the web server’s bound URLs within a Razor Pages view, create a service to store and access this information then inject that service data into Razor view.

    service:

    public class WebServerInfoService : IWebServerInfoService
{
    private readonly List<string> boundUrls = new List<string>();
    private readonly object lockObject = new object();

    public void AddBoundUrl(string url)
    {
        lock (lockObject)
        {
            boundUrls.Add(url);
        }
    }

    public List<string> GetBoundUrls()
    {
        lock (lockObject)
        {
            return boundUrls.ToList(); // Return a copy of the list to prevent modification by consumers
        }
    }
}

    Main:

     app.UseUrls(urls =>
    {
        foreach (var url in urls)
        {
            webServerInfoService.AddBoundUrl(url);
        }
    });

    Razor View:

    
@inject IWebServerInfoService webServerInfoService

<!DOCTYPE html>
<html>
<head>
    <title>Bound URLs</title>
</head>
<body>
    <h1>Bound URLs</h1>
    <ul>
        @foreach (var url in webServerInfoService.GetBoundUrls())
        {
            <li>@url</li>
        }
    </ul>
</body>
</html>
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  2. 0

    Create a custom configuration class to hold the URLs.

    public class WebServerUrls
{
    public List<string> Urls { get; set; } = new List<string>();
}

    In your Program.cs file, add the registration for this custom configuration class as a singleton service:

    builder.Services.AddSingleton<WebServerUrls>();
// ...


var builder = WebApplication.CreateBuilder(args);
// ...

var app = builder.Build();
// ...

await app.StartAsync();
var webServerUrls = app.Services.GetRequiredService<WebServerUrls>();
webServerUrls.Urls.AddRange(app.Urls);

// ...

    In your Razor Pages view, inject the WebServerUrls class using the @inject directive and access the bound URLs:

    @page
@model YourPageModel

@inject WebServerUrls WebServerUrls

<h1>Bound URLs</h1>

<ul>
    @foreach (var url in WebServerUrls.Urls)
    {
        <li>@url</li>
    }
</ul>
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