如何在 asp.net mvc 4 中创建带有部分视图的搜索功能

Question

I am using ASP.NET MVC 4 with entity framework model first.

In my "Masterpage.cshtml" I want to have a partial view which contains a textbox and a button.

The search is looking for the items title, if the text contains a items title it should display those items.

When a text is submitted the @renderbody() should show a view with the items.

My question is how can I do this in a good way? whats a good and easy approach?

So far I have done this:

Created a method in my repository that does the search function:

public List<News> Search(string query)
        {

            var queryz =  db.News.Where(x => x.Title.Contains(query));
            return queryz.ToList();
        }

Now when it comes to my Searchcontroller im kinda lost how to do this. Beacuse one actionresult need to be the partialview that has a string query parameter and other one that contains a view that will display the items?

What I have done right now is having the whole process in same actionresult:

 Repository rep = new Repository();
        [HttpPost]
        public ActionResult Search(string query)
        {
            var searchlist = rep.Search(query);

            var model = new ItemViewModel()
            {
                NewsList = new List<NewsViewModel>()
            };

            foreach (var NewsItems in searchlist)
            {
                FillProductToModel(model, NewsItems);
            }

            return View(model);
        }

        private void FillProductToModel(ItemViewModel model, News news)
        {
            var productViewModel = new NewsViewModel
            {

                Description = news.Description,
                NewsId = news.Id,
                Title = news.Title,
                link = news.Link,
                Imageurl = news.Image,
                PubDate = news.Date,
            };
            model.NewsList.Add(productViewModel);
        }

any kind of help is appreciated alot!

Answer 1

You could use the following approach:

Index.cshtml

Have one DIV that calls the search controller action, and another that'll display the results.

<div id="search-form">
    @Html.Action("Search", "Home");  // GET action in controller that displays form
</div>
<div id="search-results">
</div>

_SearchFormPartial.cshtml

Create a partial view that'll contain the search form. You can use Ajax.BeginForm so when a user searches the results will be displayed in the search-results DIV in Index.cshtml by AJAX. UpdateTargetId specifies that we want to pass the results of the search to the search-results DIV.

@using (Ajax.BeginForm("Search", "Home", FormMethod.Post,
        new AjaxOptions
        {
            InsertionMode = InsertionMode.Replace,
            HttpMethod = "POST",
            UpdateTargetId = "search-results"
         }))
{
<div>
    @Html.TextBox("query")
    <input type="submit" value="Search" />
</div>      
}

Controller

In your controller you'll need one action to display the form (partial view above) and another to process the search query and retun another partial view that'll display the results:

[HttpGet]
public ActionResult Search()
{
    return PartialView("_SearchFormPartial");
}

[HttpPost]
public ActionResult Search(string query)
{
    if(query != null)
    {
        try
        {
            var searchlist = rep.Search(query);

            var model = new ItemViewModel()
            {
                NewsList = new List<NewsViewModel>()
            };

            return PartialView("_SearchResultsPartial", model);
        }
        catch (Exception e)
        {
            // handle exception
        }
    }
    return PartialView("Error");
}

_SearchResultsPartial.cshtml

This partial will display the results. It's strongly typed taking in an ItemViewModel .

@model Namespace.ViewModels.ItemViewModel
@if (Model.SearchResults.Count == 0)
{
    <h3 class="text-error">No items matched your search query!</h3>
}
else
{
    foreach (var result in Model.NewsList)
    {
        // display search results
    }
}

Answer 2

If your _SearchResultsPartial.cshtml is not inserted into the DOM element of given ID, you should add a script: query.unobtrusive-ajax.js

It fixed the MattSull's solution in my case