.net 核心 5 中具有参数依赖关系的全局过滤器

Question

I have a validation filter. I want to register it as global level. But in the ConfigureServices method i can not assign the dependencies of it. Is there any efficient way to do it. Here is my code.

My filter.

public class ModelValidationFilterAttribute : Attribute, IAsyncActionFilter
{
    public ILogger<ModelValidationFilterAttribute> logger { get; }
    public ModelValidationFilterAttribute(ILogger<ModelValidationFilterAttribute> logger)
    {
        this.logger = logger;
    }

    public async Task OnActionExecutionAsync(ActionExecutingContext context, ActionExecutionDelegate next)
    {
        if (!context.ModelState.IsValid)
        {
            context.Result = new BadRequestObjectResult(context.ModelState);
        }
        await next.Invoke();
    }
}

Extension method

    public static IServiceCollection CustomServices(this IServiceCollection services)
    {            
        services.AddScoped<ModelValidationFilterAttribute>();
        return services;
    }

In ConfigureServices method

    public void ConfigureServices(IServiceCollection services)
    {   
        services.CustomServices();         
        services.AddControllers(options =>
        { 
            options.Filters.Add(new ModelValidationFilterAttribute());
        });           
        
    }

Code works fine if i register it on controller or action level with attribute. But when i try to register it on service level it doesn't take the argument.

Answer 1

Instead of adding this as a filter, add a filter as service. It will do the magic.

options.Filters.AddService<ModelValidationFilterAttribute>();