显示局部视图MVC三个随机文章 [英] display three random articles in a partial view mvc

问题描述

我有一个博客，其中的某个网页MainDetails，我在这里显示当前的博客，这里面详细介绍我显示页面 partialview 并在这部分我试图显示多达三个随机类似的帖子。不过我升技坚持的语法：

I have a blog in which one of the pages is MainDetails, here I display the current blog, inside this details page I display a partialview and in that partial I am trying to display three random similar posts. However I am abit stuck with the syntax:

在我的局部视图所有我做我的列表中显示的帖子，但是我想只显示3相关的类别属性的职位，但随机。 发表有属性的CategoryId ，发表有许多人同类别一对一的关系（类别可以有很多帖子，但后期只能有一类），我试图让按类别相关的3偶合的帖子：

In my partial view all I am doing is displaying the posts in my list, however I want to display only 3 posts related to the Category property, but at random. Post has the property CategoryId, Post has a many to one relationship with Category (category can have many posts but post can only have one category), I am trying to get 3 randoms posts related by category:

PostController中 GetSimilarPosts 动作：

    public ActionResult GetSimilarPosts(int id = 0)
    {
        var randomPosts = db.Categories.Where(p => p.Id == id).SelectMany(p => p.Posts).OrderBy(r => Guid.NewGuid()).Take(3);
        return View(randomPosts.ToList());
    }

不过我的 maindetails 页的输出为上述行动和 partialview 仍呈现超过3项：

However the output on my maindetails page for the above action and partialview is still showing more than 3 items:

推荐答案

如果你只是想有3个随机的文章，你可以使用类似这样

If you just want to have 3 random articles you could use something like this

public class HomeController : Controller
{
     private DatabaseContext db = new DatabaseContext();

     public ActionResult RandomPosts(int categoryId)
     {
          var randomPosts = db.Posts.Where(x => x.CategoryId == categoryId)
                                    .OrderBy(r => Guid.NewGuid()).Take(3);
          return View(randomPosts);
     }
}

和您的视图中，你会用以下称之为

And inside your view you would call it with the following

@Html.Action("RandomPosts", "Home", new { categoryId = 1 })

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