如何从 HttpClient 帮助程序 class 读取配置数据

Question

In my Blazor Server Application, I'm trying to read configuration data from appsettings.json from within a helper class that is used for configuring an HttpClient service to call a web API. In my Program.cs file, I'm adding the HttpClient service as:

builder.Services.AddHttpClient<MyHelper>();

I need to access the App configuration inside my Helper class, which is as follows:

public class MyHelper
{
    private readonly HttpClient _httpClient;

    public MyHelper(HttpClient httpClient)
    {
        _httpClient = httpClient;    
       
        _httpClient.DefaultRequestHeaders.Add(
            HeaderNames.ContentType, "application/json");

        //Read configuration from appsettings.json

        );    
    }
}

Thank you.

Answer 1

You may inject IConfiguration to access the appsettings.json contents.

public class MyHelper
{
    private readonly HttpClient _httpClient;

    public MyHelper(HttpClient httpClient,IConfiguration configuration)
    {
        _httpClient = httpClient;

       
        _httpClient.DefaultRequestHeaders.Add(HeaderNames.ContentType, "application/json");

        //Read configuration from appsettings.json
        
        var connection=  configuration["connectionString"];
    }
}