ASP.NET MVC显示成功消息 [英] ASP.NET MVC Show success message

问题描述

下面是一个例子方法，我有一个删除从我的应用程序的记录：

  [授权（角色=新闻管理）]
公众的ActionResult删除（INT ID）
{
    VAR ArticleToDelete =（来自于哪里_db.ArticleSet == a.storyId ID选择）.FirstOrDefault（）;
    _db.DeleteObject（ArticleToDelete）;
    _db.SaveChanges（）;    返回RedirectToAction（「指数」）;
}
 

我想这样做是显示说像在索引视图一条消息：Lorem存有文章已被删除我会怎么做呢？谢谢

下面是我目前的指数方法，以防万一：

  // INDEX
    [的HandleError]
    公众的ActionResult指数（查询字符串，诠释？页）
    {
        //构建查询
        在_db.ArticleSet VAR ArticleQuery =从选择;
        //检查，如果他们是一个查询
        如果（！string.IsNullOrEmpty（查询））
        {
            ArticleQuery = ArticleQuery.Where（一个= GT; a.headline.Contains（查询））;
            // MSP 2011-01-13您需要查询字符串发送到使用的ViewData查看
            计算机[查询] =查询;
        }
        //通过最新第一批订单的文章
        变种OrderedArticles = ArticleQuery.OrderByDescending（一个= GT; a.posted）;
        //需要有序的文章，并使用PaginatedList类进行分页他们4每页
        变种PaginatedArticles =新PaginatedList＆lt;物品＆GT;（OrderedArticles，页δλ0，4）;
        //分页的文章返回视图
        返回查看（PaginatedArticles）;
    }
 

解决方案

的一种方法是使用TempData的：

  [授权（角色=新闻管理）]
公众的ActionResult删除（INT ID）
{
    VAR ArticleToDelete =（来自于哪里_db.ArticleSet == a.storyId ID选择）.FirstOrDefault（）;
    _db.DeleteObject（ArticleToDelete）;
    _db.SaveChanges（）;
    TempData的[消息] =Lorem存有文章已被删除;
    返回RedirectToAction（「指数」）;
}
 

和索引中的的行动，你可以获取从TempData的此消息，并利用它。例如，你可以把它作为将被传递到您的视图视图模型的属性，以便它可以表现出来：

 公众的ActionResult指数（）
{
    VAR消息= TempData的[消息];
    // TODO：做一些像传递给视图消息
}
 

---

更新：

例如：

 公共类MyViewModel
{
    公共字符串消息{搞定;组; }
}
 

和则：

 公众的ActionResult指数（）
{
    VAR模型=新MyViewModel
    {
        消息= TempData的[消息]作为字符串;
    };
    返回查看（模型）;
}
 

和强类型视图中：

 ＆LT; D​​IV＆GT;＆LT;％：Model.Message％GT;＆LT; / DIV＆GT;
 

Here is an example method I have that deletes a record from my app:

[Authorize(Roles = "news-admin")]
public ActionResult Delete(int id)
{
    var ArticleToDelete = (from a in _db.ArticleSet where a.storyId == id select a).FirstOrDefault();
    _db.DeleteObject(ArticleToDelete);
    _db.SaveChanges();

    return RedirectToAction("Index");
}

What I would like to do is show a message on the Index view that says something like: "Lorem ipsum article has been deleted" how would I do this? Thanks

Here is my current Index method, just in case:

    // INDEX
    [HandleError]
    public ActionResult Index(string query, int? page)
    {
        // build the query
        var ArticleQuery = from a in _db.ArticleSet select a;
        // check if their is a query
        if (!string.IsNullOrEmpty(query))
        {
            ArticleQuery = ArticleQuery.Where(a => a.headline.Contains(query));
            //msp 2011-01-13 You need to send the query string to the View using ViewData
            ViewData["query"] = query;
        }
        // orders the articles by newest first
        var OrderedArticles = ArticleQuery.OrderByDescending(a => a.posted);
        // takes the ordered articles and paginates them using the PaginatedList class with 4 per page
        var PaginatedArticles = new PaginatedList<Article>(OrderedArticles, page ?? 0, 4);
        // return the paginated articles to the view
        return View(PaginatedArticles);
    }

解决方案

One way would be to use TempData:

[Authorize(Roles = "news-admin")]
public ActionResult Delete(int id)
{
    var ArticleToDelete = (from a in _db.ArticleSet where a.storyId == id select a).FirstOrDefault();
    _db.DeleteObject(ArticleToDelete);
    _db.SaveChanges();
    TempData["message"] = ""Lorem ipsum article has been deleted";
    return RedirectToAction("Index");
}

and inside the Index action you could fetch this message from TempData and make use of it. For example you could pass it as a property of your view model which will be passed to the view so that it can show it:

public ActionResult Index()
{
    var message = TempData["message"];
    // TODO: do something with the message like pass to the view
}

---

UPDATE:

Example:

public class MyViewModel
{
    public string Message { get; set; }
}

and then:

public ActionResult Index()
{
    var model = new MyViewModel
    {
        Message = TempData["message"] as string;
    };
    return View(model);
}

and inside the strongly typed view:

<div><%: Model.Message %></div>

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