ASP.NET MVC过滤器

 /// <summary>
    /// 验证登陆过滤
    /// </summary>
    public class LoginAuthorizeAttribute : AuthorizeAttribute
    {
        private IAuthenticationService _authencation;
        public LoginAuthorizeAttribute()
        {
            _authencation = new FormsAuthenticationService();
        }
        public override void OnAuthorization(AuthorizationContext filterContext)
        {
            base.OnAuthorization(filterContext);
            //如当前请求为ajax请求时返回指定错误json
            if (!filterContext.HttpContext.User.Identity.IsAuthenticated && (new HttpRequestWrapper(HttpContext.Current.Request)).IsAjaxRequest())
            {
                filterContext.Result = new JsonResult()
                {
                    Data=new ResultModel(ResultType.UnAuthorize),
                    JsonRequestBehavior=JsonRequestBehavior.AllowGet
                };
            }
        }
    }
Application处理ajax的异常：当异步请求某页面时如果后台运行处理过程抛出异常或者错误时请求时，只会得到一个500内部服务器错误的页面，不开启浏览器的开发者模式的是看不到任何返回的，由此可在Global.asax中写上以下方法，实现返回指定结果

protected void Application_Error(Object sender, EventArgs e)
{
    var lastError = Server.GetLastError();
    if (lastError != null)
    {           
        CNBlogs.Infrastructure.Logging.Logger.Default.Error("Application_Error", lastError);

        if(Request != null && (new HttpRequestWrapper(Request)).IsAjaxRequest())
        {                    
            Response.Clear();
            Response.ContentType = "application/json; charset=utf-8";
            Response.Write(Newtonsoft.Json.JsonConvert.SerializeObject(
                new { isSuccess = false, message = lastError.Message }));
            Response.Flush();
            Server.ClearError();
            return;
        }

        Response.StatusCode = 500;
        Server.ClearError();
    }
}

ajax客户端收到的结果如下：

 从此，可以尽情地抛异常了。

public class CompressAttribute:ActionFilterAttribute
    {
        public override void OnActionExecuting(ActionExecutingContext filterContext)
        {
            var acceptEncoding = filterContext.HttpContext.Request.Headers["Accept-Encoding"];
            if (!string.IsNullOrEmpty(acceptEncoding))
            {
                acceptEncoding = acceptEncoding.ToLower();
                var response = filterContext.HttpContext.Response;
                if (acceptEncoding.Contains("gzip"))
                {
                    response.AppendHeader("Content-encoding", "gzip");
                    response.Filter = new GZipStream(response.Filter, CompressionMode.Compress);
                }
                else if (acceptEncoding.Contains("deflate"))
                {
                    response.AppendHeader("Content-encoding", "deflate");
                    response.Filter = new DeflateStream(response.Filter, CompressionMode.Compress);
                }
            }
        }
    }

public class CompressAttribute:ActionFilterAttribute
    {
        public override void OnActionExecuting(ActionExecutingContext filterContext)
        {
            var acceptEncoding = filterContext.HttpContext.Request.Headers["Accept-Encoding"];
            if (!string.IsNullOrEmpty(acceptEncoding))
            {
                acceptEncoding = acceptEncoding.ToLower();
                var response = filterContext.HttpContext.Response;
                if (acceptEncoding.Contains("gzip"))
                {
                    response.AppendHeader("Content-encoding", "gzip");
                    response.Filter = new GZipStream(response.Filter, CompressionMode.Compress);
                }
                else if (acceptEncoding.Contains("deflate"))
                {
                    response.AppendHeader("Content-encoding", "deflate");
                    response.Filter = new DeflateStream(response.Filter, CompressionMode.Compress);
                }
            }
        }
    }

       [Compress]
        public ActionResult Index()
        {
            ViewBag.Message = "Welcome to ASP.NET MVC!";

            return View();
        }

页面引用来源:Asp.Net MVC 3.0 使用Gzip压缩

想抛就抛：Application_Error中统一处理ajax请求执行中抛出的异常