ASP.NET MVC如何实现链接，返回到previous页？ [英] ASP.NET MVC how to implement link which returns to previous page?

问题描述

标题说明了一切。

的一些背景：的

我有一个搜索机制 - 搜索视图，搜索结果视图和详细信息视图（其中重presents结果的一个项目，像web表单一个FormView）。我想详细查看链接，这将返回用户搜索结果视图。

Some context:
I got a search mechanism - search view, search results view and a details view (which represents one item of results, like a formview in webforms). I want a link in details view, which would return user to search results view.

的创意的：

刚刚看了一下TempData的，但我想这不会帮助，导致用户可能他想回到之前调用一些行动。

Ideas:
Just read about TempData, but i guess that wouldn't help, cause user might call some actions before he wants to return.

会议可能的工作，但我不知道我应该如何准确地处理它。

Session might work, but I'm not sure how exactly i should handle it.

我不想使用JavaScript来实现这一目标。

I don't want to use javascript to accomplish this.

编辑：

看来，我将与EU-GE-ne`s解决方案坚持下去。这里的结果是：

Seems that i'll stick with eu-ge-ne`s solution. Here's result:

#region usages

using System.Web.Mvc;
using CompanyName.UI.UIApp.Infrastructure.Enums;

#endregion

namespace CompanyName.UI.UIApp.Infrastructure.Filters
{
    /// <summary>
    /// Apply on action method to store URL of request in session
    /// </summary>
    public class RememberUrlAttribute : ActionFilterAttribute
    {
        public override void OnActionExecuting  
           (ActionExecutingContext filterContext)
        {
            var httpContext = filterContext.HttpContext;

            if (httpContext.Request.RequestType == "GET"
                && !httpContext.Request.IsAjaxRequest())
            {
                SessionManager
                .Save(SessionKey.PreviousUrl,
                      SessionManager.Get(SessionKey.CurrentUrl) ??
                      httpContext.Request.Url);

                SessionManager
                .Save(SessionKey.CurrentUrl,
                      httpContext.Request.Url);
            }
        }
    }
}

顺便说一句，请问.IsAjaxRequest（）方法的作品？这只能理解MS AJAX或者比这更聪明？

Btw, how does .IsAjaxRequest() method works? It understands only MS AJAX or it's smarter than that?

推荐答案

我认为你需要像这样定义过滤器（未测试 - 无VS此刻）：

I think you need something like this custom filter (not tested - have no VS at the moment):

public class PrevUrlAttribute : ActionFilterAttribute
{
    public override void OnActionExecuting(ActionExecutingContext filterContext)
    {
        var httpContext = filterContext.HttpContext;
        var session = filterContext.HttpContext.Session;

        if (httpContext.Request.RequestType == "GET"
            && !httpContext.Request.IsAjaxRequest())
        {
            session["PrevUrl"] = session["CurUrl"] ?? httpContext.Request.Url;
            session["CurUrl"] = httpContext.Request.Url;
        }
    }
}

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