Csharp 依赖注入C#异常

我有一个ASP.NET核心项目，我正try 在其中使用依赖项注入. 然而，我得到了这个例外:

模型绑定的复杂类型不能是抽象类型或值类型，并且必须具有无参数构造函数.记录类型必须有一个主构造函数.或者，给‘googleAuthHelperService’参数一个非空默认值.

这是因为try 将接口IGoogleAuthHelperService注入到我的控制器类中:

[Route("/auth")]
public async Task<IActionResult> AuthAsync(IGoogleAuthHelperService googleAuthHelperService)
{

        string response = await GoogleAuthHelperService.ReadHttpBodyAsync(Request.Body);
        string code = GoogleAuthHelperService.ParseGoogleResponseCode(response);
        
        //string code = Request.Body.
        await googleAuthHelperService.GetTokenAsync(code);
        if (response != null)
        {
            return View("Error");
        }
        else
        {
            return View("_Auth");
        }
}

public interface IGoogleAuthHelperService
{
    public Task<string> GetTokenAsync(string code);
}
public class GoogleAuthHelperService : IGoogleAuthHelperService
{
    private GoogleAuthSettings _settings;
    public GoogleAuthHelperService()
    {
    }
    public GoogleAuthHelperService(IGoogleAuthSettingsService googleAuthSettingsService)
    {
        if (googleAuthSettingsService.Settings != null)
        {
            _settings = googleAuthSettingsService.Settings;
        }
        else
        {
            _settings = new GoogleAuthSettings();
        }
    }
    
    public async Task<string> GetTokenAsync(string code)
    {
        HttpHelper httpHelper = new(_settings.GoogleTokenUrl); // googleauthsettings.token
        _settings.AuthorizationCode = code;
        string content = BuildGoogleTokenBody();
}
public static async Task<string> ReadHttpBodyAsync(Stream stream)
{
    using (StreamReader streamReader = new(stream))
    {
        string content = await streamReader.ReadToEndAsync();
        return content;
    }
}
}

如您所见，我将一个IGoogleAuthSettingsService类注入到我的构造函数中，该构造函数用于从appsettings.json文件中获取设置:

public interface IGoogleAuthSettingsService
{
    public GoogleAuthSettings? Settings {get; }
}
public class GoogleAuthSettingsService : IGoogleAuthSettingsService
{
    public GoogleAuthSettings? Settings { get; set;  }

}

即使当我使用IGoogleAuthSettingsService删除构造函数时，我也收到了相同的异常，并且我有点迷茫:

public interface IGoogleAuthHelperService
{
    public Task<string> GetTokenAsync(string code);
}
public class GoogleAuthHelperService : IGoogleAuthHelperService
{
    private GoogleAuthSettings _settings;
    public GoogleAuthHelperService()
    {
    }
    public GoogleAuthHelperService(IGoogleAuthSettingsService googleAuthSettingsService)
    {
        if (googleAuthSettingsService.Settings != null)
        {
            _settings = googleAuthSettingsService.Settings;
        }
        else
        {
            _settings = new GoogleAuthSettings();
        }
    }
    
    public async Task<string> GetTokenAsync(string code)
    {
        HttpHelper httpHelper = new(_settings.GoogleTokenUrl); // googleauthsettings.token
        _settings.AuthorizationCode = code;
        string content = BuildGoogleTokenBody();
}
}

下面是我将服务注册为Singleton的Program.cs:

using GmailCleaner.Models;
using GmailCleaner.Services;

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.
builder.Services.AddRazorPages();

IGoogleAuthSettingsService? googleAuthService = builder.Configuration.Get<GoogleAuthSettingsService>();
builder.Services.AddSingleton<IGoogleAuthSettingsService>(googleAuthService);

GoogleAuthHelperService googleAuthHelperService = new();
builder.Services.AddSingleton<IGoogleAuthHelperService, GoogleAuthHelperService>();

var app = builder.Build();
// Configure the HTTP request pipeline.
if (!app.Environment.IsDevelopment())
{
    app.UseExceptionHandler("/Error");
    // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
    app.UseHsts();
}

app.UseHttpsRedirection();
app.UseStaticFiles();

app.UseRouting();

app.UseAuthorization();

app.MapRazorPages();
app.MapControllers();

app.Run();

我也在我的Program.cs中try 了这样的注射:

GoogleAuthHelperService googleAuthHelperService = new();
builder.Services.AddSingleton<IGoogleAuthHelperService>(googleAuthHelperService);

有谁知道如何修复我正在注射的类吗？