public class LoginFilterAttribute : ActionFilterAttribute
{
//表示是否检查登录
public bool IsCheck { get; set; }
//Action方法执行之前执行此方法
public override void OnActionExecuting(ActionExecutingContext filterContext)
{
base.OnActionExecuting(filterContext);
if (IsCheck)
{
var returnUrl = filterContext.HttpContext.Request["ReturnUrl"];
if (string.IsNullOrEmpty(returnUrl))
returnUrl = filterContext.HttpContext.Request.Url.ToString();
//校验用户是否已经登录
if (!LoginHelper.Instance.IsLogin)
{
//跳转到登陆页
if (filterContext.HttpContext.Request.IsAjaxRequest())
{
filterContext.Result = new JsonResult
{
Data = new
{
ajaxValidLogin = false,
message = "登录已失效，请重新登录",
ReturnUrl = returnUrl
}
};
}
else
{
filterContext.Result = new EmptyResult();////加入EmptyResult就告诉ASP.NET MVC在本拦截器执行结束后，不必再为当前请求执行Controller中Action的代码
filterContext.HttpContext.Response.Redirect("/Account/Login?ReturnUrl=" + HttpUtility.UrlEncode(returnUrl),true);
}
}
}
}
}