CODEWITHSUNDEEP
javascriptc#-4.0asp.net-mvc-4
Geminirand
Geminirand

Reputation: 315

JavaScript to choose droplist value not working in ASP .NET MVC4 with HTMLHelper and "All"

I'm using JavaScript to get the selected value of a drop list in MVC 4 but have an issue I think is caused by the HTMLHelper.

CONTROLLER - to populate droplist

private string PopulateStandard(object selectedValue = null)
{
    var query = db.Database
                  .SqlQuery<StandardModel>(
                        "SELECT * FROM [DBO].[GetStandards] ('" + 
                        User.Identity.Name + "', '" + DateTime.UtcNow + "')")
                  .ToList();

    ViewBag.Standard = new SelectList(query, "Standard", "Standard", selectedValue);

    try { return query[0].Standard; }
    catch { return ""; }
}

VIEW

The view has this section for the drop list. Please note the inclusion of "All". I think this is the problem. That puts a first row atop the drop list saying "All" with a null value. I want that. So far so good (so what)

@Html.DisplayNameFor(m => m.Standard)
@Html.DropDownList("Standard", "All")

JAVASCRIPT

It's a long story, but I have other code that requires me to get the value of the drop list using JavaScript, so I'm doing it like this:

var e = document.getElementById("Standard");
var sStandard = e.options[e.selectedIndex].value;

PROBLEM

If no value was chosen, then I should get the first row, which would be "All" for text or "" for value. Instead, I'm getting the second row, which is the first one with data as populated from the database.

Is the HTML helper causing me to not get the first row? Or is my JavaScript off?

EDIT - to show ViewSource on drop list

These are the first few lines of the rendered list

<select id="Standard" name="Standard"><option value="">All</option>
<option value="2S">2S</option>
<option value="Aero">Aero</option>

Upvotes: 2

Views: 155

Answers (1)

Bappi Datta
Bappi Datta

Reputation: 1380

@Html.DropDownList("Standard", "All")

here "All" is option label. so you do not get this as value.

Upvotes: 1

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