C#•3w ago

.Net 8 Web Api Config

Deployed webapi in IIS. Previously using .net 4.5.* where changing config in application settings in UI and restarting for dynamic change. Now in .Net 8 using Environment.GetenvironmentVariable, on publishing generated web.config file but adding values doesn't reflect and added values to pool also none but when added to system level it works but it takes time to recognise. Tried ChatGPT and older relevant question here and none working can someone point me in the best direction? TIA

25 Replies

Gela•3w ago

Could you elaborate? I didn't understand anything

M!RFAN•3w ago

In my .net 8 webapi, I'm using Environment.GetEnvitonmentVariable to get some env values While on development those values are stored in launchsettings.json but now after publishing to IIS, how to set those environment variables

Insire•3w ago

https://stackoverflow.com/questions/31049152/publish-to-iis-setting-environment-variable

Stack Overflow

Publish to IIS, setting Environment Variable

Reading these two questions/answers I was able to run an Asp.net 5 app on IIS 8.5 server. Asp.net vNext early beta publish to IIS in windows server How to configure an MVC6 app to work on IIS? The

M!RFAN•3w ago

Tried But it doesn't read from there

Unknown User•3w ago

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M!RFAN•3w ago

but in IIS using application settings I can dynamically set config values and connection strings while using.net 4.5.*. So is there any way to do like that in ,net 8

Unknown User•3w ago

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M!RFAN•3w ago

More like I can't understand the docs. Sorry

Unknown User•3w ago

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M!RFAN•3w ago

I mean after publishing I get web.config and appsettings file

Unknown User•3w ago

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M!RFAN•3w ago

how would you do in my situation where I need to set some config values but later need to change it but using IIS application settings tab

Unknown User•3w ago

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M!RFAN•3w ago

Ok so manually editing appsettings.json can trigger hot reload and the iis works with my new config values right?

Unknown User•3w ago

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M!RFAN•3w ago

for say in aws lambda I need to redeploy my function only when I need to change config value in appsettings. So is there any alternative in this case But I want to set env vars in pool and let my webapi to get from there using Environment.GetEnvironmentVariable without IConfiguration. I tried setting it in pool en vars but still not working unless i set it in system level

Unknown User•3w ago

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M!RFAN•3w ago

Im REALLY REALLY SORRY Worked on Legacy system for way too long and don't want my peers to be uncomfortable when I'm migrating . Guess we all need to upgrade I'm deeply grateful and Really SORRY for my legacy approach

Unknown User•3w ago

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M!RFAN•3w ago

But I need a config value in class library. How to get that

Unknown User•3w ago

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M!RFAN•3w ago

can I have some example because stackoverflow is mostly about JSONFIle on class Lib

Unknown User•3w ago

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MODiX•3w ago

appsettings.json:

{
  "My": {
    "Foo": {
      "Kix": 5
    }
  }
}

{
  "My": {
    "Foo": {
      "Kix": 5
    }
  }
}

src/Foo/FooOptions.cs:

public class FooOptions
{
  public const string SectionName = "My:Foo";

  public string Bar {get;set;} = "default value for bar";
  public int Kix {get;set;} = -1;
  public DateTime? Pouet {get;set;} = default;
}

public class FooOptions
{
  public const string SectionName = "My:Foo";

  public string Bar {get;set;} = "default value for bar";
  public int Kix {get;set;} = -1;
  public DateTime? Pouet {get;set;} = default;
}

src/Foo/FooServiceCollectionExtensions.cs:

namespace Microsoft.Extensions.DependencyInjection; // <==== recommanded for service.Add so that you don't clutter Startup file

public class FooServiceCollectionExtensions
{
  public static IServiceCollection AddFoo(this IServiceCollection services) =>
    services
      .AddOptions<FooOptions>()
      .BindConfiguration(FooOptions.SectionName)
      .Validate(options => options.Kix >= 0, $"The configuration key '{FooOptions.SectionName}:{nameof(Kix)}' cannot be negative")
      ;

  public static IServiceCollection AddFoo(this IServiceCollection services, Action<FooOptions> configure) =>
    services
      .AddFoo()
      .Configure(configure);

namespace Microsoft.Extensions.DependencyInjection; // <==== recommanded for service.Add so that you don't clutter Startup file

public class FooServiceCollectionExtensions
{
  public static IServiceCollection AddFoo(this IServiceCollection services) =>
    services
      .AddOptions<FooOptions>()
      .BindConfiguration(FooOptions.SectionName)
      .Validate(options => options.Kix >= 0, $"The configuration key '{FooOptions.SectionName}:{nameof(Kix)}' cannot be negative")
      ;

  public static IServiceCollection AddFoo(this IServiceCollection services, Action<FooOptions> configure) =>
    services
      .AddFoo()
      .Configure(configure);

Program.cs / Startup.cs:

services.AddFoo();
// or
services.AddFoo(fooOptions => fooOptions.Kix = 12);

services.AddFoo();
// or
services.AddFoo(fooOptions => fooOptions.Kix = 12);

Bar.cs:

public class Bar
{
  private readonly FooOptions _fooOptions;

  // .Value in ctor is fine only if it's always ever a non-changing value (no reload and/or no scoped resolution)
  public Bar(IOptions<FooOptions> fooOptions)
    => _fooOptions = fooOptions.Value;
}

public class Bar
{
  private readonly FooOptions _fooOptions;

  // .Value in ctor is fine only if it's always ever a non-changing value (no reload and/or no scoped resolution)
  public Bar(IOptions<FooOptions> fooOptions)
    => _fooOptions = fooOptions.Value;
}

M!RFAN•3w ago

I really need to study this

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.Net 8 Web Api Config