MVC :: Model Instance Hang Around For A While?
Jun 26, 2010
I've used mvc for a few weeks now, and just realized that my controller constructor is invoked on every action, and that's where a model is typically instantiated in the examples I've seen, so the model never lives beyond one request. I have older third party db and it seems that some judicious in-memory state management would make sense in my intra-net app. It seems like a true classic mvc app ( non-web oriented) would allow for retention of model instances in-memory (one fundamental repository behavior is in-memory collection - re: M.Fowler). I am not able to use Entity Framework, and a little curious if it does some caching instead of always immediately persisting to db, thereby providing that repository behavior. Do I have to save my model instance to the ole Session / TempData object to retain it in memory across *numerous* controller actions? Or does this implementation absolutely require some other mechanism like NHibernate? Seems like just keeping something
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Dec 10, 2010
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Protected
Sub Button1_Click(ByVal
sender As
Object,
ByVal e
As EventArgs)
Handles Button1.Click
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Mar 7, 2011
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May 19, 2010
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Sep 1, 2010
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Mar 11, 2010
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Dec 28, 2010
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<form action="/x/Order/Checkout" id="cartForm" method="post">
<input name="__RequestVerificationToken" type="hidden" value="UDjN9RdWheKyWK5Q71MvXAbbDNel6buJd5Pamp/jx39InuyYIQVptcEubIA2W8DMUzWwnZjSGkLspkmDPbsIxy8EVuLvfCSZJJnl/NrooreouptwM/PaBEz2v6ZjO3I26IKRGZPqLxGGfITYqlf8Ow==">
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<input type="hidden" name="CartItems[0].ServiceTypeID" value="1">
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<input type="hidden" name="CartItems[1].ServiceTypeID" value="2">
<input type="hidden" name="CartItems[1].Quantity" value="1">
</form>
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$("#cartForm").submit(function (event) {
event.preventDefault(); var form = $("#cartForm");
var panel = form.parent(); panel.parent().block();
$.ajax({ type: "post", dataType: "html",
url: '<%: Url.Content("~/Order/Checkout") %>',
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success: function (response, status, xml) { panel.parent().unblock(); },
error: function (response) { panel.parent().unblock(); } }); });
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[HttpPost]
[ValidateAntiForgeryToken]
public virtual ActionResult Checkout( CartModel cart ) {
} And finally this is the CartModel class involved
public class CartModel : BaseModel{
public int CustomerID { get; set; }
public int FirmID { get; set; }
public List<CartItemModel> CartItems { get; set; }
public CartModel() { CartItems = new List<CartItemModel>();
} } public class CartItemModel : BaseModel
{ public int ServiceTypeID { get; set; }
public int Quantity { get; set; } }
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Aug 2, 2010
when I use Html.HiddenFor( model => model.OwnerId ) to create a hidden field, the value assigned to that field is zero. When I use <input type="hidden" value="<%: Model.OwnerId %>" /> to add the hidden field to the form, the value is assigned correctly.
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[Code]....
The Create action method is relatively straight forward.
public ActionResult Create( ... )
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Dec 15, 2010
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my ViewModelBase.DetailItem<TEntity> property in the view model is just a reference to an entity class in my data model. If I wanted to move presentational annotations to the view model, I would have to quite radically revise my design to one where I duplicate data model properties in my view model and use an object mapping tool to populate view model objects based on data model objects.
[code]....
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May 4, 2010
Say I got a domain model as follows: (and my repository expect an instance of this object)
[Code]....
And a view model (which my views are based on)
[Code]....
At the moment I got it like this and have my controller action manually create a new Person object from the PersonModel object before passing it on to the repository, which does not feel right.
So I tried to have PersonModel inherit from Person and pass that to the repository (also tried casting the PersonModel to a Person object first), but that don't work out.
What's the right way to have PersonModel automatically cast to Person? I want to keep this logic as my current structure allow me to keep things really loosely coupled, with the repository layer not having a clue how it's being used.
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Oct 12, 2010
I have recently started working on ASP.NET with MVC 2 framework, and I am facing following difficulty in validating my data,
Scenario:
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[Code]....
And the user control (Tab1.ascx) refers the specific model for it,
[Code]....
Now if in my Tab1Model if I put following validation
[Code]....
In the controller ModelState.IsValid is always indicates TRUE. How do I override the validation behavior such that it as well looks the items in the collection member (which holds sub models) as well.
<%= Html.ValidationMessage("FirstName") %>
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I am a newbie in mvc3 and i'm wondering how to use attribute like [Display(Name="")] for model that comes from an entity data model that I provide im my "Model" folder in my mvc3 project.
I didn't provide a .cs class for each of my database tables .
other words, I want the controller class render a edit form for me like :
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Jun 2, 2010
I have been reading about different model for development
model view control mvc
model view presenter MVP
Model view view model MVVM
i belive MVC has two big Advantage over webform 1) TDD 2) More control on HTML
MVP is bit variation in mvc model. rapid development as well as 1) TDD 2) More control on HTML (correct me if i m wrong) see the below link
[URL]
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I want to authenticate a user using model popup extender. So I wrote a program to do this. Everything OK when user enter the correct details. But user enters the wrong detail, it should shows in a lablel in a popup panel. It shows; but the problem is it close the popup . But I want to keep the popup if the user enters the wrong details. How can I do this?
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I need to get model data into a JavaScript variable and use it as an int to compare values. But I can only figure out how to get the model data as strings, otherwise the compiler complains.
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[code]....
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Sep 26, 2010
I have a question regading sql name instance ???
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A instance of a class is created in the partial class of an aspx page.Under page_load or button click method I'm trying to set the value to the class. but when each postback takes place new instance is created and I'm losing the previous value.
public partial class DatabaseSelection : System.Web.UI.Page
{
DBProperties dbpro;
Metadata obmeta;
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
dbpro = new DBProperties();
}
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Nov 12, 2010
How can check whether a instance is marked as serializable?
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