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@Html.DropDownListFor using ViewBag SelectedListItem the selected item is not shown


@Html.DropDownListFor using ViewBag SelectedListItem the selected item is not shown

By : Justin Ludwig
Date : November 19 2020, 03:59 PM
fixed the issue. Will look into that further My code is the following: , The problem is in this expression:
code :
m => m.Customer.PrimaryEngineer
m => m.Customer.PrimaryEngineerId


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MVC3 @Html.DropDownListFor not populating selected item

MVC3 @Html.DropDownListFor not populating selected item


By : Noe Lopez
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , I have the following dropdown list in an MVC3 application and the selected item is not showing a value. My dropdown list is contained in a list of a custom class. My view code is as follows. , Try like that:
code :
@Html.DropDownListFor(
    m => m.PartAttributes[i].Value, 
    new SelectList(
        Model.PartAttributes[i].PartList, 
        "Value", 
        "Text", 
        Model.PartAttributes[i].Value
    ), 
    "Choose Part"
)
Html.DropDownListFor will ignore ViewBag values

Html.DropDownListFor will ignore ViewBag values


By : Yumi
Date : March 29 2020, 07:55 AM
it helps some times I think your condition is wrong. Try this. Check the 'Selected' property.
code :
 @Html.DropDownListFor(model => model.AssetTypeID, ((IEnumerable<TechnologyType>)ViewBag.Techtypes).Select(option => new SelectListItem
           {
               Text = (option == null ? "None" : option.Name),
               Value = option.AssetTypeID.ToString(),
               Selected = (option.AssetTypeID == (int)ViewBag.AssetID)
           }), "All")
Html.DropDownListFor with pre- selected item

Html.DropDownListFor with pre- selected item


By : user3112112
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , The property name of your model should not match the ViewBag (ViewData) key. Make the following changes to your code:
code :
public ActionResult Edit(int id = 0)    
{
    Dictionary dictionary = db.Dictionary.Single(d => d.DictionaryId == id);
    if (dictionary == null)
    {
        return HttpNotFound();
    }

    // change the ViewBag key for the collection of languages to something else
    // as it matches the LanguageFrom & LanguageTo properties of the Dictionary object
    ViewBag.Languages = new SelectList(db.Language, "LanguageId", "Name");
    return View(dictionary);
}

@Html.DropDownListFor(x => x.LanguageFrom, ViewBag.Languages as SelectList)
@Html.DropDownListFor(x => x.LanguageTo, ViewBag.Languages as SelectList)
@Html.DropDownListFor() Always Displays Blank even with a List Item selected

@Html.DropDownListFor() Always Displays Blank even with a List Item selected


By : Pippo Torre
Date : March 29 2020, 07:55 AM
it helps some times I'm working through a Pluralsight course https://app.pluralsight.com/library/courses/full-stack-dot-net-developer-fundamentals/table-of-contents , Solution found: Site.css contains
code :
.form-control {
    font-size: 17px;
    padding: 20px 15px;
    -ms-border-radius: 9px;
    border-radius: 9px;
}
Pass Dropdownlistfor selected value to controller on selected item changed

Pass Dropdownlistfor selected value to controller on selected item changed


By : Syed Izharullah
Date : March 29 2020, 07:55 AM
This might help you Trying to pass the selected value which is studentid in this case to BeginForm. , finally figured out
View
code :
 @using (Html.BeginForm("DDSubmit", "Home", FormMethod.Post))
{
    @Html.DropDownListFor(m => m.studentID, Model.DDList, "Please Select",new { onchange = "this.form.submit();" })
}
public ActionResult DDSubmit(DDModel ddlist)
    {
        int id = ddlist.studentID;
        var info = (from r in entity.STUDENTS where r.Student_Id == id select r).ToList();
        return View(info);            
    }
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