How to pass dropdown value from master view to controler and view selected value on partial view in MVC 4

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Hello sir,
I want to make a searchin page with dropdown and I want to show search items on a partial view but when I select dropdown and click search then I do not found the value of dropdown on my controller page .

Posted 31-Jan-16 18:39pm

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[no name] 1-Feb-16 1:06am

Tell us clearly, what is present in which file. Means where is your dropdown, button and grid etc are present..

Member 12222029 1-Feb-16 4:14am

I am use a Index.chtml where we use dropdownlist that is bind from database and my search button is also in this page and within this chtml page I want to use partial.chtml page where I want to show my search result grid but in this case I can't find my dropdown selected value on button click but one thing is also happened here that when I use button submit type then no problem but in this case my page is totaly refresh (it is a problem)

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F-ES Sitecore · Accepted Answer · 2016-01-31T23:41:00

Lots of ways to do this, but the gist is that you need to render your partial view from an action that you pass the search term to.

Anyway, he's a rough example

models

C#

public class SearchTerm
{
    public string SearchID { get; set; }
    public string SearchText { get; set; }
}

public class SearchModel
{
    public string SearchValue { get; set; }
    public SelectList SearchTerms { get; set; }
}

index.cshtml

@model Models.SearchModel

@using(Html.BeginForm())
{ 
    <p>
        @Html.DropDownListFor(m => m.SearchValue, Model.SearchTerms)
    </p>
    <p>
        <input type="submit" value="Search"/>
    </p>
}

@if(Model != null)
{
    @Html.Action("Search", "Home", new { searchTerm = Model.SearchValue })
}

_searchResults.cshtml

C#

@model List<string>

@if(Model == null)
{
    return;
}

@foreach(string result in Model)
{
    <div>@result</div>
}

Controller

C#

private SelectList GetTerms()
{
    return new SelectList(new List<SearchTerm>
    {
        new SearchTerm{SearchID="1", SearchText="One"},
        new SearchTerm{SearchID="2", SearchText="Two"},
        new SearchTerm{SearchID="3", SearchText="Three"}
    }, "SearchID", "SearchText");
}

[HttpGet]
public ActionResult Index()
{
    SearchModel model = new SearchModel();
    model.SearchTerms = GetTerms();
    return View(model);
}

[HttpPost]
public ActionResult Index(SearchModel model)
{
    model.SearchTerms = GetTerms();
    return View(model);
}

public ActionResult Search(string searchTerm)
{
    if (string.IsNullOrWhiteSpace(searchTerm))
    {
        return new EmptyResult();
    }

    // do your search here
    List<string> results = new List<string> { "Result 1 for " + searchTerm, "Result 2 for " + searchTerm };
    return PartialView("~/Views/Home/_searchResults.cshtml", results);
}