Multiple Models Sent To A Single View Instance
Jan 5, 2010
I'm trying to learn the ropes of ASP.NET MVC and so far so good. One thing which I haven't seen addressed yet is the 'right' or most elegant way to pass multiple data models to a view. To help put the question in context, take this example: Say I was making a blog. When I log in I want the home screen to display a list of all new unapproved comments, as well as a list of recently registered users, and a list of the most recently submitted blog posts.
Most discussions I've seen suggest strongly-typing the view page so it can be called with something like "return View(RecentComments)" and iterate through the comments in the view, or to cast the data model like "var NewUsers = (MembershipUserCollection) ViewData.Model". What I'm ideally after is the 'right', or at least a 'right-enough', way of passing multiple models while still maintaining appropriate logic separation.
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Oct 26, 2010
So far I've seen demos of MVC that have simple pages, one for login, one for register, one for listing a table. In order to understand better the transition for WebForms developers into MVC patterns, I would like to understand how can I put together multiple CONTROLS (like the one provided by the default MVC project that VS2010 creates for us ...and make it work. OK so as an example, imagine we want to change the LogonUserControl.ascx to allow us to login (so to show UserName and Password textboxes and Logon button) from the Home Page.
1) We update the Control as follow:
2) We update the HomeController.cs file to handle the Logon Button Post event as follow:
We needed to move some code from AccountController to HomeController in order to get the control to work under the Index view. So ...with little luck it seems to work! Now the problem happens when you navigate to the Register view, considering that now we are not any longer on the HomeController "domain" but we are under AccountController. Register page shows perfectly and since the LogOnUserControl.ascx belongs to the MasterPage, it shows too. Since we are not logged yet, it will be displaying the UserName and Password textboxes. But we don't really care about that, because we are on the Register view and after populating the Register values, we click on the Register button. This is the error I get:
>>> To me that I come from the WebForms world, it seems like even if the event fired was the Register button (therefore under the AccountController domain), there is a kind of hidden OnInit event fired for any control on that view, in this case the Logon event. I'm sure this is NOT the case but the real question is... if we are allowed to have only one Controller x view, how can we put together controls that come from different "controller domains" and display them inside a single view?
Could I develop an eCommerce site using MVC that has the home page displaying different controls like [Most Purchased Product, Product of the Month, Special Promotions, Messages Inbox, Company Events ... and each control has it's own button to click and do something (so a proper POST request)] on the home page, unless I only have ONE single Controller which i'm not even sure if it will work or if it would make sense ....since MVC is all about separation of responsibilities.
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Oct 13, 2010
I have one view page.now what i want to do,i want to bind two models to same view.
I have to bind two different models to single view.
I have bind view with storngly type with Department model First display all the Department, now on click of Department i have to show the Courses associated with that Department.
How can I achieve this.
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Apr 14, 2010
<%@ Page
Title=""
Language="C#"
MasterPageFile="~/Views/Shared/Site.Master"
Inherits="System.Web.Mvc.ViewPage<JCIOrange.Models.UserProfile>" %>
How do I display more than one model per view? The above line limits me to only display UserProfiles. I want to also display other models, like UserJob and etc....how would I go about doing so?
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Jul 4, 2010
I am having two models User and Address. In the create User view apart from the user information, the user can add one or more addresses to himself. So is there a way to do model based validation for multiple models in the same time ?
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Aug 11, 2010
How do you handle multiple models in a view?. I have 2 tables. Member and MemberAddress
Member class contains Collection of MemberAddresses since a single member may have a billing and shipping address:
public class Member
{
public virtual int MemberId { get; set; }
public virtual string Username { get; set; }
public virtual bool IsActive { get; set; }
public virtual bool IsSame { get; set; }
[Code]....
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Jan 12, 2011
below written question :
1.) What is the name of the OS process in which App Domain resides.
2.)if suppose There are Three Windows application hosted on a same envoirment and two instance is working for each application at a Time, means now total instance are six .what will happen among the below written cases :
a.) There will be six different app domain in a single OS process
b.) There will three app domain(one for each application) in a single OS process and some Parallel thread will be executed in each app domain for another instance.
c.) There will be Three OS process corresponding to each application.
3.) If eveything will remain same except there are three web application in place of windows in point 2, will there be any change in functioning.
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Dec 12, 2010
I know that view model can be used for rendering a view, but if a page needs different models, how can I pass them to the view? And how do I use them?
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Feb 17, 2010
quick question: I have a view on my HomeController which is used to create a new 'model'. This view posts to a different controller to keep things tidy. The problem I am having is when I enter invalid details into the form, the rules I specified never seem to make it back to the original view and thus my validation messages or summary never get populated. Is there a way around this because I am using a view model with two IEnumerable lists in it.
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Oct 9, 2010
Im trying to implement an unit of work pattern by passing an unit of work instance into my repositories.
Relevant code from Global.asax.
[code]....
What i want is that a maximum of 1 instance of SqlUnitOfWork is created per request and is passed into my repositories (via their respective constructors).
Is the InRequestScope() method on the IUnitOfWork binding enough? If not how can i achieve this?
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Nov 3, 2010
i have a base controller that looks like this:
[Code]....
and a contact model that inherits from the base model.
the master page inherits form the base model,
nad the contact page inherits from the contact nodel,
but then i get an error while loading the contact page that it expects the contact model but gets the base model?
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Feb 11, 2010
Here is a conceptual questions that I was going over the last few days. I have a simple application that I want to turn into a hosted solution.
My take on it is that in a sense each record in the database would have its own ID representing the hosted instance of the application, rather
than installing the application each time a new one is needed. Then I can easily differentiate between the instances, however I don't want to
store the instance ID in a session (bad for URL back links etc.) and don't really want to add it as part of the URL.
What would you suggest ?
Another part of the question would be how to pragmatically create a sub-domain representing the application instance, however that's a
Whole different question J
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Sep 29, 2010
I have a web project which includes two button in a view.when i click a button some textboxes along with that second button have to be visible.After entering data in textboxes,when i am trying to click the second button, its not working.What should i do to make it work?
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Nov 30, 2010
I am having a hard time solving the following with an MVC view. My goal is to display data from multiple tables in a single MVC view. The bulk of the data comes from a table called Retailers. I also have another table called RetailerCategories which stores the retailerid from the Retailers table and also a categoryid linking to a Category table. Note that there are multiple records for each retailerid in the RetailerCategories table.
In the view I want to show a list of retailers and with each retailer I want to show the list of categories applicable to them. What would be the best way to accomplish this?
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Feb 4, 2011
I am implementing a view for Food. (ASP.NET MVC2) Then depending on the type (say fruit or vegetable for example) I will change the view.
Can I do this without creating a seperate view for fruit and vegetable?
I.e. Say we have url structure like [URL] and don't want [URL] [URL]
So I want to be able to change the view depending on the type. I'm using a tabstrip control from telerik, to give you an of the difference in the views - it'd just be say - not displaying one particular tab for Veg, and displaying it if fruit, for example.
Can a view accept two different view models ? so when we hit [URL] the code determines what type the object is (Fruit or Vegetable) then sends either FruitViewModel or VegetableViewModel ? If I just send one viewmodel how can I control the logic to display or not display certain things in the view?
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Mar 18, 2010
I want to use RenderPartial twice in my view with different models associated. The problem is that some properties are present in both models (nickname, password). They have no prefix, so even the id's or names are equal in the output. Now, if I have model errors for nickname or password, both fields get highlighted.
Main View:
[code]...
How can I change this?
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Sep 6, 2010
I'm trying to develop my application and I've got a master page where I'm planning to create a div container, where my "news" will be loaded from my database and will be shown always on a main site. Then inside of the main placeholder I'm planning to load some extra data too from my database... and there's the question: how to solve that ? is there any possibility to pass a model to a master page ? or two viemodels to a view page inside the main placeholder on my page ? (one with news, and other containing some other data).
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Jan 5, 2011
I have a requirement where i need to use Master Class (a class in my model) as ViewMaster's Model and the View using MasterDetail (another model). i use them in this form and View in this form
<%
@
Master
Language="C#"
Inherits="System.Web.Mvc.ViewMasterPage<HotWorldPOS.Models.MasterNavigationModel>"
MasterPageFile="~/Views/Shared/Site.Master"
%>
[Code]....
I get an exception when i run this
The model item passed into the dictionary is of type 'Models.GeneralMasterModel', but this dictionary requires a model item of type 'Models.MasterNavigationModel'.
my requirement is like this, the viewmaster is of three column layout, first column showing an IEnumerable containing some navigation links, the third column contains an IEnumerable of MasterDetail class depending on the Master object clicked, and the center column is the content place holder for displaying child views (for editing, displaying selected masterdetail). this view's model will be deferent for each masterdetail selected.
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Mar 8, 2011
Is it possible to do something like this?
Inherits="System.Web.Mvc.ViewPage<List<SectionAdmin.Models.ADirectory>>, <List<SectionAdmin.Models.BDirectory>>"
I am trying to use both models in my page.
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Oct 26, 2010
I am not sure why this happens, but when I have an Html.TextBoxFor(model => model.SomeObject.SomeProperty), when I post, the property of that object is always null.
When I look at the markup generated, I see <input type="text" name="SomeObject_SomeProperty" id="SomeObject.SomeProperty" value = "" />
If I change the helper to Html.TextBoxFor(model => model.SomeObject.SomeProperty, new {id = "SomeProperty"}) the controller is then able to pick the value up. Why is this happening? I feel as though I shouldn't have to be specifiying the id for the textbox as it works when fine when not using child objects on a view model, IE <%: HtmlTextBoxFor(model => model.SomeProperty) %>.
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May 8, 2010
I've recently began learning ASP.NET MVC.I created my first project, and added a model via Linq TO SQL. The first model handled a database table that held a list of menu items.I then created a view and the view would loop through all of the menu items returned by the controller and build a custom menu for me.
I then created a Model via Linq TO SQL to point to a table that hold's my site articles.I created a view that would itereate through all of the site articles returned by the controller and list them in the view.
Now I've taken the logic from the menu view and created a partial usercontrol view to build my menu. I've done the same thing with the SiteArticles.
How do I make the data from both of these modles availble in one view?I basically want to HTML.RenderPartial("MenuControl") in my master page and RenderPartial("ArticleControl") in the conent of the view.
I'm using the original view that i created to show articles..
So If i remove the rendering of the menucontrol user control from the master page and i call the view to show the articles, the articles will render because the controller knows to load the articles and return them to the view..
If i add the menu user control to the masterpage, I get an error because the view recieves data from the site article model/controller but not from the menu model/controller.
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Apr 6, 2010
For example i need create page to display few models. Inherits property can take in only one value, as i mean.
[Code]....
I want something like:
[Code]...
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Oct 19, 2010
I'm working on an ASP.NET MVC 2 project with some business entities that have metadata dataannotations attributes applied to them (Validation attributes, Display attributes, etc.).
Something like:
[Code]....
Using the metadata from different views is no problem, as long as I am using my business entities as viewmodels or as part of a viewmodel like this:
[Code]....
However, sometimes I need to code a view for editing some, but not all fields of an entity. For those fields I want to reuse the metadata already specified in my user entity. The other fields should be ignored. I'm talking about custom view models like this:
[Code]....
That's where I am running into problems. The custom view model above leads to an exception when the view is generated, because it has no password property.
The associated metadata type for type 'Zeiterfassung.Models.ViewModels.Users.UserNameViewModel+UserModel' contains the following unknown properties or fields: Password. make sure that the names of these members match the names of the properties on the main type.
Also, even if this exception did not occur, I expect to get into even more trouble with model validation on form submit because Password is marked as required in my business entity.
I can think of several workarounds, but none seem really ideal. In any case I can't change the database layout so that the password field would be in a separate entity in my example above.
How would you handle this scenario?
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May 19, 2010
I have a stored procedure that returns 3 tables within the single recordset it returns. If I set a SqlDataSource to get data from this procedure, it works, but it only returns the first table. I want to have a GridView display the data from the 2nd or 3rd table using a SqlDataSource, but I can't figure out how to specify a particular table.
While there are some posts discussing this out there, I can't get a definitive answer about whether or not this is even possible (?). In a worst-case scenario, I can create another SP that only returns the 3rd table - but that creates a little maintenance headache that I would prefer to avoid.
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Nov 4, 2010
I have a parent View that uses a few partial views. Each partial view has its own custom model. The parent View is a model containing each of the partial view's model. In other words this parent View model is NOT flat.
How do i get POST data to bind with the parent's model object? Do i have to write a custom model binder?
Update I'm not binding to a collection of objects of the same type (ie: a collection of uploaded files). I'm binding to object that contains multiple of objects. For example:
[code]....
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