I followed MVC 2 source to create a CheckBoxList helper.
I was able to identify the problem I am having but not able to solve it.
On my view I have the following:
[Code]....
The problem is in the bold part ...
The newSelectList is equal to selectList but all items were deselected.
What am I missing?
why SelectList dont have a default constructor new SelectList()
View 1 RepliesMembershipCreateStatus is not getting identified, I am not able to implement sql membership with out this.
View 3 RepliesI'm failing at getting the selected item on a mvc dropdown list. I can't stand viewdata, and every example uses it. Here is my code,
//controller
public ActionResult Register(Models.Person APerson)
{
}
public class Person
{
public Person().............
how can i disable first value in the select list when the checkbox is clicked
View 2 Repliesi have wrote the following code inside a model class, but there was an error that indicates that the select list could not be found:-
public SelectList Countries {
get;
private
set; }
so which "using system" i should add????
I'm working on a MVC3 web application. I want a list of categories shown when editing a blo from whe applications managements system. In my viewmodel i've got the following property defined for a list of selectlistitems for categories.
/// <summary>
/// The List of categories
/// </summary>
[Display(Name = "Categorie")]
public IEnumerable<SelectListItem> Categories { get; set; }
The next step, my controller contains the following edit action where the list of selectlistitems is filled from the database.
public ActionResult Edit(Guid id)
{
var blogToEdit = _blogService.First(x => x.Id.Equals(id));
var listOfCategories = _categorieService.GetAll();
var selectList = listOfCategories.Select(x =>new SelectListItem{Text = x.Name, Value = x.Id.ToString(), Selected = x.Id.Equals(blogToEdit.Category.Id)}).ToList();
selectList.Insert(0, new SelectListItem{Text = Messages.SelectAnItem, Value = Messages.SelectAnItem});
var viewModel = new BlogModel
{
BlogId = blogToEdit.Id,
Active = blogToEdit.Actief,
Content = blogToEdit.Text,
Title = blogToEdit.Titel,
Categories = selectList //at this point i see the expected item being selected
//Categories = new IEnumerable<SelectListItem>(listOfCategories, "Id", "Naam", blogToEdit.CategorieId)
};
return View(viewModel);
}
When i set a breakpoint just before the view is being returned, i see that the selectlist is filled as i expected. So at this point everything seems to be okay. The viewmodel is filled entirely correct.
Then in my view (i'm using Razor) i've got the following two rules which are supposed to render the selectlist for me.
@Html.LabelFor(m => m.Categories) @Html.DropDownListFor(model=>model.Categories, Model.Categories, Model.CategoryId)
@Html.ValidationMessageFor(m => m.Categories)
When I run the code and open the view to edit my blog, I can see all the correct data. Also the selectlist is rendered correctly, but the item i want to be selected lost it's selection. How can this be? Until the point the viewmodel is being returned with the view everything is okay. But when i view the webpage in the browser, the selectlist is there only with out the correct selection. What am I missing here? Or doing wrong?
Is there a way to remove items from a SelectList?
View 1 RepliesI cannot get my code to work with the usual workarounds. I have a model which exposes a SelectList and a value for the selected item in it. The list is built like: new SelectList(persons, "Id", "Name");
where persons is an array of type Person with a *string* property named Id and a string property named Name. My model has a SelectList property returning a list built as shown, and a SelectedPersonId *string* property which should be updated by the dropdown. Here's my view code:
Html.DropDownListFor(m => m.SelectedPersonId, Model.PersonList)
I can see the persons in the dropdown and select one item, but the model's SelectedPersonId property never gets updated (I get a null). Of the two workarounds I found googling around, one stated to build the SelectList in the model, using the constructor shown above; another recommended to ensure that the selected value is a string. I did both, but still it does not work.
I had been building my SelectLists in the View, but I found examples doing it in code that I liked better. Now I'm creating one of my SelectLists like this:
[Code]....
And all is good, but I'm not sure how to do two things. First, I'd like to add an initial SelectListItem that prompts the user to select a value. When instantiating the SelectList in a loop this is easy, but I was hoping to keep this approach. The second problem is setting the default selected item. In the constructor it shows the 4th parameter to be used for this purpose, but I'm not certain how to do it. There's a property of this object named "DefaultView". It's a boolean, and I'd like that to determine the selected state. Is this possible?
I have written an Enum extension method that allows me to create a view model and allows me to easily bind a generic Enum to a SelctList like:this.ProductStatusList = new ProductStatusTypes().BindToSelectList<ProductStatusTypes>
(product.Status.ToString());
In my View I can then have:
<% using (Html.BeginForm()) {%>
<fieldset> [code]...
Notice I am using EditorForModel and then a seperate DropDownList. My question is: Is there a way to get the EditorForModel to be clever enough to pick up that I want to use a SelectList instead of a TextBox for status?
I'm trying to display a dropdown on my view page that has a custom text value.
I'm trying to display a list a Contacts. A Contact contains a ContactID, FirstName, and LastName.
<%= Html.DropDownListFor(m => m.ContactId, new SelectList(Model.Contacts, "ContactID", "LastName"), "- Select a Contact -") %>
Right now I'm just displaying the last name, but I'd like to display the first name and last name in the dropdown.
I'm having problems retrieving the values of a selectlist in my form collection. I've tried making a viewmodel with an attribute with the same name as the select list.
I'm honestly just realizing I REALLY don't understand how model binding works with selectlists. I've just been assuming that the following conventions apply:
Name the select list the same thing as the attribute on the model you want it to bind to. Apart from that, I really don't get it. I've looked at several books on it and they're useless frankly. How does a select list work with a) form collection and b) a particular model?
What do I use to set the dataValueField of the Select List when I'm using a list of strings. I want to be able to set the value of the option in the select. If i have:
List<string> list = new List<string>();
list.Add("apple");
list.Add("orange");
and I want my html to be:
<select>
<option value="apple">apple</option>
<option value="orange">orange</option>
</select>
I can currently populate and display a Drop Down using the following model annotations, viewmodel, and custom Editor template - but am having problems persisting the submission (more on that below):
//Domain
Public class Person
{
public string FirstName {get;set;}
public string LastName {get;set;}
public string ClassName {get;set;}
public int ClassId {get;set;}
...
}
//ViewModel
Public class PersonViewModel
{
public Person Person {get;set;}
Like I mentioned, the above works fine - as in the drop down is displayed properly, but obviously in its current state it's not saving the classID (or name) to the Person entity, I understand the problem but not sure how to fix it.
My questions:
How can I save the selected value from the drop down to the Person entity
How can I save both the ID and the Name into the Person entity - I'm guessing only way is a hidden field that gets populated with an onchange event (this sounds weird, I'm sure, but it's being stored in a document DB, so it's not normalized - I may just store Name in the end)
I have my class RoomType:
Int32 Id
String Name
String ColorCode
My viewmodel gets a List<Roomtype> RoomTypes which should be displayed in a dropdown.
Each dropdown option item should have: 1) as title the Name, 2) as value the Id, and 3) the style background-color #ColorCode.
My problems are how to convert this list correctly into a List<SelectListItem> as required by ASP.NET MVC's DropDownFor helper, and then to have the correct values inserted for each option.
I've tried to have a new readonly property in my viewmodel, which has a getter RoomtypeSelectList which returns new SelectList(RoomTypeList) but I can't get the correct properties to show (Name, Id, Background color).
I was wondering if it's possible to render an Html Helper in a View inside a codeblock. So instead of:
[code]....
And have this render. Of course as it is, it wont render, so is there a way to programically decide if a textbox can be added without having to have a million delimiters in the page to accomplish this?
I wanted to write a code for JQgrid in asp.net .I have tried the same in asp.net MVC,but i want it now in asp.net .n MVC we use Helper class,and return json data,so what to do in asp.net where helper class can not be used.Serialization can be done with data to get it in json.,but what about Htmlhelper.
View 2 RepliesI'm trying to use the Video helper (Microsoft.Web.Helpers) but nothing happens to Flash or Silverlight.
View 7 RepliesCan anyone help me with an alphabetical pager helper?
View 21 RepliesI am trying to create 2 Html helpers but that use the String Type as in MVC 2.
1. Html.FileFor Would render something like: <input type="file"
2. Html.Buttom and Html.Submit that would render <input type="button" or <input type="submit" In this case I suppose it makes no sense to have the For.
I know how to do (2) unless there would be something more than rendering the help and defining the Html attributes. However (1) I don't know how to do it
I would like to create a static helper method that I can call from a view.
Is it possible for a helper method to have access to the current ViewContext without needing to explicitly pass the ViewContext to the method as a parameter?
Something like HttpContext.Current except for ViewContext.
When is it appropriate to create a helper class for a sql server database using the asp.net framework? Basically I'm trying to create a minature wiki (with multiple pages) and storing all of the data/strings for a specific page into a table on it's own.
View 3 RepliesI need to use the standard ASP.NET membership database tables in plain winform projects, and I DO NOT WANT to add the ASP.NET dll, because my app must run with .NET Client framework, and not full framework. Does somebody knows of a helper class that links to ASP.NET tables in plain vanilla VB ot c# code? I mean with functions equivalent to CreateNewUser, CheckUserCredentials, isUserinRole, RoleList etc...
View 1 RepliesIs there a way to retrieve the client side ID for a model property similar to how the helpers like LabelFor etc generate the ID? For example, I have a model with a DateOfBirth property. I want to hook up that field to a jQuery DatePicker. Normally, I would hook up the date picker like this:
[Code]....
This works fine but hard codes the DateOfBirth property name. Ideally, I would like to use this:
[Code]....
Is this already available out of the box somewhere? I just created an extension method on the HtmlHelper class that does exactly this, but I wondered if there was already something built-in so I don't have to reinvent and test the wheel.