MVC :: Dynamically Add Items To A List Located In A Model?
Feb 18, 2011
i have a list of complex object letīs say: List<House>, inside of a model that i pass to the view.
To render that list i use the Html.EditorFor(x => x.list[i], "PartialView") inside of a div (<div id="editor"></div>). To "add" an item i use an ajax method that return a new partial view of the same type, an append it to the the div.
This way, the new partial it's appended but when i do the post, only the first item (list[0], the one that i pass in the controller to start) itīs bounded, but, the items added via ajax arenīt.
What could i do in this case? i wan't mi list to grow every time i hit the link that calls the ajax method and then take every item and add them to my database. i've followed this tutorials:
Last time I had problem in getting value from Dropdown List that located in the listview. I want to use the Jquery to get the value of thos Dropdown list and insert that data into the database,.
This time I have added some more radio buttun that are generated from my SQL server database and I want to use Jquery to get those radio button.
I have a requirement in my application that, while saving the application, need to get all the value from drop down list and pass it to the view model. But application should not allow the user to select more than one item from drop down list manually, ie, only one value at a time. My view model is like ...
public class ListManagement { public IEnumerable<selectListItem> InactiveProduct { get; set; } public string[] InactiveProductSelected { get; set; } public IEnumerable<selectListItem> ActiveProduct { get; set; } }
I'm designing my own custom control that contains a .NET dropdownlist. What I'm wondering is if it is possible to populate my dropdownlist with listitems placed in a placeholder? For example:
This doesn't work because the DropDownList control only allows ListItems as child controls. But, I want to do something similar to this so when the user includes my control on a page, they can do something like this:
Using MVC2, I want to know how you add the options of a dropdownlist from a database. I have several lookup lists so I will need to do this many times. I'm stuck on part 5 of the MusicStore (which is using MVC3) at this part
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Alternatively if someone could recommend an MVC2 tutorial which covers drop lists.
Is it possible to select values from a List, where the items contain in a different list aswell?for example;
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What I need are all the items from the first list "Items", where the string contains something from the second list "List".So I need something which returns the first 3 items (which contain the term "Item") from the first list.
i'm working on a MVC3 webapp and my Model consist of many classes that use a custom type (TextRef) for textual properties. for example my Product entity looks like :
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TextRef :
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so in my views i'm using :
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how could i add validation support to TextRef items ? for example making Product.Title required
I'm creating an quiz application which queries the database and extracts the questions and choices. I use dynamically created controls such as a checkbox list and fill the values dynamically. How do I do this? Right now I have these functions:
array_random_init(); this creates a 10 element integer array from 1-20 - extract_question(i): this extracts a question indexed at i in DB, I created the controls and set the appropriate text in this function. - validate_question(i); this is called by button_click and validates the question i according to DB.
I understand I have to recreate the controls in Page_init on postback, but what should it look like? Do I need to add "if IsPostBack" in page_init, or do I create the controls in page_init() and reset their properties in page_load when I use extract_question(i)? Also, I cannot seem to clear the selected boxes on postback, I added page directive "enableviewstate=false" but it doesn't work.
Customer Name : <Textbox> Phone : <TextBox> <button> : button to Add More <Textbox> Phone to add multiple Phone Contact Name : <TextBox> Address : <TextBox> <button> : button to Add More Form Contact add multiple Contact
public class InvoiceModel{ public int InvoiceID { get; set; } public int Date { get; set; }[code]...
for create view i can use Html.TextBoxFor(m => m.InvoiceID) and for Date.but how can i fill List?and how can i use global for this list as Shopping cart?
I've a product model that contains a list of description models. Every description model contains some string values because every product can have a description for every language. Here it is a semplified version of my models:
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So my view to insert a new product is like this:
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And my PartialProductDescription view is like this:
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Now, the views are perfect. With some Jquery UI I have a form with all the product properties and a tab panel with the language descriptions.
Unfortunatelly my POST action with the firm public ActionResult ProductNew(ProductModel model) has all the model property InternationalDescriptions that contain 2 empty models. So if I write something in the form in the first description textarea, model.InternationalDescrtiptions[0].Description is always empty.
So, how I can tell to MVC to take description textarea values and put them in the model?
I have a control that's bound to a list property. If I remove elements from that list using javascript and post, then the model gets updated, and the elements get removed.
Unless I remove all the items from the list. Then no names for that property go into the form data, and so the default model binder leaves the model's list untouched. This code from DefaultModelBinder.cs line 572 in the RTM sources makes it clear:
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So how do I indicate to the model binder that I do want it to update the list and Ido want the list to be emptied?
I am trying here to find a simple solution to bind an array of elements to a model using the MVC model binder. If I use the @Html.Checkbox helper now, it will generate me something like this :
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I should be ok as it manage the checked in state and not checked in. The problem here is when I try to bind it back to the model (something really simple)
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In the controller I try to bind it with the UpdateModel()
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When I debug, the chk variable in the model is still null. I tried with IList<string>, bool[], IList<bool> nothing seems to make it. Is there any other way to deal with this else than form.GetValues("chk")[0].Contains("true") ?
Classic scenario - Categories, Subcategories and Products tables.
Subcategories belong to a corresponding main category
Products belong to a corresponding subcategory
The problem is that not all products do that. Some of them belong directly to a main category because that category has no subcategories. So if I wish to query those products I have to use a main category field in the products table.
And of course I need a subcategory field in the products table also for those products that do belong to a subcategory.
All that does not seem like a good normalized schema.
Now if I use the Adjacency list model the categories and subcategories tables become one (parentID column) and I only have to use a single CatId in my queries.
public class UserModel { public Guid Id { get; set; } public string EmailAddress { get; set; } public string LoginName { get; set; } public string Password { get; set; } } public class GroupModel { public Guid Id { get; set; } public string Name { get; set; } public List<UserModel> Users { get; set; } }
I created a View (Create.Aspx) by inheriting GroupModel class.
It is generating only two fields (Id, Name) in my aspx view. Also I am able to get the form data in the Model class object in Ņ[HttpPost]Ņ request which contains the data for ID and NAME field in controller.
How can I get the data in List<UserModel> object? I am thinking to Put a List control with checkboxes containing Users. Then catch them using FormCollection object in controller.
For a large fillin form I use the asp.net FormView for the magic databinding to my model. In this model I've a property called Rides (shown below), which exposes a list, which I obviously not want to be replaced entirely. So I made it readonly.
However, this way I can't use the databinding features anymore. Is there a common solution for this problem?
I am looking here to find a quick and easy way to bind a list of checkbox list items when the postback occurs in the model. Apparently the common way to do it now seems to do it like this form.GetValues("checkboxList")[0].Contains("true"); It seems painfull and not exactly safe. Is there a way to bind a list of checkbox (that are created with or without an helper in the view) or even an array of data for that matters during the UpdateModel(myViewModel, form.ToValueProvider()); phase which would populate an IList<string> or string[] inside of the model ?
When it creates a view using the list scaffold the headings are hard coded. I want to pull the headings from the data model, but no luck. I was assuming LabelFor would be the solution. I must be missing something basic.
