Question

我正试图从appsetings.json文件中读取一些数据：

public void ConfigureServices(IServiceCollection services)
    {
        services.AddOptions();
        //sercies.Configure<Models.AppDate>(Configuration);
        services.Configure<Models.AppData>(Configuration.GetSection("AppData"));

        //It does not works
        string option = Configuration.Get<Models.AppData>().AnotherOption;

        //It works
        string anotherOption = Configuration["AppData:AnotherOption"];

        // Add framework services.
        services.AddMvc();
    }

使用这些课程：

public class AppData
{
    public Jwt Jwt { get; set; }
    public string AnotherOption { get; set; }
}

public class Jwt
{
    public string Audience { get; set; }
    public string Issuer { get; set; }
}

在appsettings.json中：

{
"Logging": {
"IncludeScopes": false,
"LogLevel": {
  "Default": "Warning"
}
},
"AppData": {
"Jwt": {
  "Audience": "http://localhost:5000",
  "Issuer": "http://localhost:5000"
},
"AnotherOption": "Not yet"
}
}

当我调试时，选项var it为null。 ¿我怎么能实现这个？ TY

Answer 1

我不确定为什么上面的代码不起作用。但我知道其他方法。

string option = Configuration.GetSection("AppData").Get<Models.AppData>().AnotherOption;

或

string option = ConfigurationBinder.Get<Models.AppData>(Configuration.GetSection("AppData")).AnotherOption;

Answer 2

public void ConfigureServices(IServiceCollection services)
{
    var config = Configuration.GetSection("Application").Get<Application>();
}

//Model class
public class Application
{
    public string ServiceUrl { get; set; }
}

下面的方法可以访问appsettings.json

中的数据

namespace Particles
{
class ParticleGenerator
{
    Texture2D texture;
    float spawnWidth;
    float density;

    List<Particles> particles = new List<Particles>();

    float timer;

    public ParticleGenerator(Texture2D newTexture, float newSpawnWidth, float newDensity)
    {
        texture = newTexture;
        spawnWidth = newSpawnWidth;
        density = newDensity;

    }

    public void createParticle(GraphicsDevice graphics)
    {

        particles.Add(new Particles(texture, new Vector2(graphics.Viewport.Width / 2 , graphics.Viewport.Height /2), new Vector2(5, 1)));

    }

    public void Update(GameTime gameTime, GraphicsDevice graphics)
    {
        timer += (float)gameTime.ElapsedGameTime.TotalSeconds;
        while (timer > 0)
        {
            timer -= 1f / density;
            createParticle(graphics);
        }

        for (int i = 0; i < particles.Count; i++)
        {
            particles[i].Update();
            if (particles[i].Position.Y > graphics.Viewport.Height)
            {
                particles.RemoveAt(i);
                i--;
            }
        }
    }

    public void Draw(SpriteBatch spriteBatch)
    {
        foreach (Particles particle in particles)
        {
            particle.Draw(spriteBatch);
        }
    }

}

从appsettings.json读取数据它不起作用

2 个答案: