How to save two Entities from one View. Suppose I have two Entities Party and Person with One to Many relation. Now I need to save both Entities from Party View. I am using ASP.NET MVC4.
public partial class Cm_Opt_Pty_Party_S
{
public Cm_Opt_Pty_Party_S()
{
this.Cm_Opt_Psn_Person_S = new HashSet<Cm_Opt_Psn_Person_S>();
}
public int Pty_ID { get; set; }
public Nullable<int> Pty_PARTYTYPECODE { get; set; }
public string Pty_FULLNAME { get; set; }
public string Pty_GOVTID { get; set; }
public Nullable<int> Pty_GOVTIDTC { get; set; }
public Nullable<int> Pty_GOVTIDSTAT { get; set; }
public virtual ICollection<Cm_Opt_Psn_Person_S> Cm_Opt_Psn_Person_S { get; set; }
}
What you can do is create a ViewModel This class would contain the relevant properties needed to create both entities.
Then you base your View on the ViewModel instead, and pass that to the controller.
When you want to save the entities, you can build up the separate entities and save them.
I have a better understanding of your issue, so editing this answer to show the solution I would use.
Your Controller will deliver the Party object to your view for displaying the Party information. Using a loop you can display the items contained in the collection.
#foreach(var m in Model.Persons)
{
#Html.DisplayFor(model=>m.FirstName)
#Html.DisplayFor(model=>m.Surname)
}
When you want to add more items into the collection, you will need to render a partial view or new view containing a form for adding a Person. It will be strongly typed as Person model and the Controller action recieving the post will be expecting a Person
If for example a Person just had a FirstName,Surname and PartyId the form would use these helpers in your view
#Html.TextboxFor(m=>m.FirstName)
#Html.TextboxFor(m=>m.Surname)
#Html.TextBoxFor(m=>m.PartyId)
You then submit that back to your controller, and have logic for adding the person to the collection. Then return the view with Party model containing the newly added Person in the Persons collection.
Using #Ajax.BeginForm or some custom Jquery/Javascript you could handle this async to prevent page refreshing during the process.
If you don't want to do it this way, another option is EditorTemplates. See here for example: ASP.NET MVC LIST and Create in same view
Related
No code to show. I just want to understand something. I already do some MVC code (I have a model, I ask Visual Studio to create Controller and View).
Each view has only "ONE MODEL" associated. So, with Razor, I can show data from this model. I play with my code and I understand it up to now.
BUT ...
On the same view, HOW we can work with another MODEL ?
For me, a model is simply a class with properties, etc. My database has an equivalent "data table" for each model. I can manipulate it with Entity Framework ... no problem. But, I need to use DATA from different model (different table) in the SAME VIEW and Visual Studio does not give me permission to use another MODEL in the view.
What is the strategy ? (or maybe I don't understand something ...)
Thank you.
The strategy is to build a view model, a model built to be displayed, and represents the data that you need to use.
Example :
You have these classes, classes who are a representation of your database :
public class FootballTeam{
public string Name{get;set;}
public string Logo{get;set;}
}
public class FootballGame{
public Datetime Date {get;set;}
public string Competition {get;set;}
}
public class Referee{
public string Name{get;set;}
public int Experience {get;set;}
}
To display information about a match game, you can create a view model for this, class who can references some classes of your business model if necessary :
public class GameViewModel{
[DisplayName("Home team")]
public FootballTeam HomeTeam{get;set;}
[DisplayName("Referee")]
public Referee Referee{get;set;}
[DisplayName("Visitor team")]
public FootballTeam VisitorTeam {get;set;}
[DisplayName("Comments")]
public List<string> RedactionComments{get;set;}
}
And create a view who will consume this GameViewModel.
In general, when you create a new MVC project, your have a folder named "ViewModels" in your presentation layer who contains some classes like this one.
This method allows to separate your business model to your presentation model, which are 2 completely different things.
There are very good answers here : What is ViewModel in MVC?
You can update your model type of your razor view to any type you want. It will work as long as you are passing that type from your action method.
Simply open up the razor view and change the line where it says what type the model is.
#model Customer
Now you need to make sure that you are passing a Customer object from your action
public ActionResult Create()
{
return View( new Customer());
}
Also when you create a view, You do not need to necessarily select the Model type in the Dialog box. You can keep that empty and add it to the razor view as needed ( as shown above)
If you want to bring data from 2 different table, Create a new view model which has properties needed for the view and use that as your view's model type.
You should use ViewModal to Create a ViewModal that will be combination of two modals properties as per our need
ViewModel contains the fields which are represented in the strongly-typed view. It is used to pass data from controller to strongly-typed view with Own Defined Modals
Understand how to use View Modal in MVC From Link Below -
Understand View Modal In MVC
CODE THAT DEMONSTRATE HOW TO USE VIEWMODALS IN MVC
Product.cs
public class Product
{
public Product() { Id = Guid.NewGuid(); }
public Guid Id { get; set; }
public string ProductName { get; set; }
public virtual ProductCategory ProductCategory { get; set; }
}
ProductCategory.cs
public class ProductCategory
{
public int Id { get; set; }
public string CategoryName { get; set; }
public virtual ICollection<Product> Products { get; set; }
}
ProductViewModel.cs
public class ProductViewModel
{
public Guid Id { get; set; }
[Required(ErrorMessage = "required")]
public string ProductName { get; set; }
public int SelectedValue { get; set; }
public virtual ProductCategory ProductCategory { get; set; }
[DisplayName("Product Category")]
public virtual ICollection<ProductCategory> ProductCategories { get; set; }
}
I have a CustomersController and in the Detail.cshtml view I need to display a list of that Customer's contacts and a list of that Customer's locations. I have a Detail(int? id) ActionResult and I have access to my CustomerService from within the controller. As of now in my Detail ActionResult I am able to do:
var cust = _custService.GetCustomerById(id);
return View(cust);
How would one recommend getting the rest of my lists in the view. I think I will create a GetContacts(customerID), GetLocations(CustomerID) within my CustomerService and then call them just like I call GetCustomerByID above. If I were to do it this way how would I have access to these lists in my view.
The next thing I was thinking about was possibly creating a ViewModel that has all of the basic customer properties like customer.Name, customer.Phone but then trying to figure out how I also make sure the ViewModel has the customer's contacts and locations. Would I just add 2 more properties to the ViewModel like customer.contacts and customer.locations since EF6 will make them available to me?
Any suggestions on the best way to go about getting multiple lists of information related to an entity in a view? Customer contacts and Customer locations are both one-to-many
The best practice is using a view model to transfer the data, as you have thought about.
public class CustomerDetailViewModel {
public string Name { get; set; }
public string Phone { get; set; }
public List<Contact> Contacts { get; set; }
public List<Location> Locations { get; set; }
}
I have set up a large form with lots of entries. It populates my model and then saves to the database. I also need to be able to pull this information out of the database, put it into the model, and populate a bunch of fields with it for review. How do I do this?
Using ASP.NET MVC 4 Razor.
var db = new TechProjPlansContext();
TechProjPlan model = new TechProjPlan();
I can set up my data context and model, but where do I go from here to populate the model with a data entry chosen by ID?
You can search by givenId and if found return result type of TechProjPlan otherwise null
var resultFound = db.TechProjPlans.Where(e=>e.Id = givenId).FirstOrDefault();
I strongly recommend following this tutorial step by step. From the tutorial to answer your question:
Write a Model class like:
public class Movie
{
public int ID { get; set; }
public string Title { get; set; }
public DateTime ReleaseDate { get; set; }
public string Genre { get; set; }
public decimal Price { get; set; }
}
Add a DbSet to your Context class: (TechProjPlansContext in your project)
public class MovieDBContext : DbContext
{
public DbSet<Movie> Movies { get; set; }
}
Make sure you can connect to the database server, check your connectionStrings in your Web.config file.
As you wanted to filter only one Entity by using ID, you need a Controller class:
public ActionResult Details(int id = 0) // here id is set to 0 if it's null
{
Movie movie = db.Movies.Find(id);
if (movie == null)
{
return HttpNotFound();
}
return View(movie);
}
As you see, you'll be returning View(movie), that means you return Details page with the Entity (a movie) you got from the database. And have a View, that renders to actual HTML code the client will see. At the top of it, add the line:
#model MvcMovie.Models.Movie // (something TechProjPlans.Models.Movie in your project)
#Html.LabelFor(model => model.Title)
This will create a simple text showing the movie's title.
It's not logical to go deeper within an answer, so rest is up to you with that tutorial. Just keep in mind that the code above is only one example and you can use endless variations within each level for your situation.
You can right click on the directory Controllers, select Add New and select your Model class and Context class at the page. That will produce a Controller and Views (index, edit, delete, details, insert) tied to it which will be a good way to start your MVC study.
I'm working with ASP.NET MVC 4, but I on't think that matters for the purpose of this question.
I have a relatively complex model for my edit view. Like this:
public class Recipe_model
{
public string Name { get; set; }
public List<Recipe_Ingredient_model> Ingredients { get; set; }
}
where Ingredients is
public class Recipe_Ingredient_model
{
public int RecipeID { get; set; }
public int? UnitID { get; set; }
public double? Quantity { get; set; }
public Ingredient_model Ingredient { get; set; }
}
which itself contains the Ingredient model.
When I make a form for this, the built-in Html.EditorFor() doesn't work for anything past the properties of the Recipe_model, so I'm using partial views to display the editor for each of the sub-models.
That works fine as far the interface goes, but when I submit the form to the controller and try to bind to the Recipe_model automatically using
[HttpPost]
public ActionResult Edit(Recipe_model model)
{
return View(model);
}
it fails because the ids of the input elements in the partial views do not conform to the correct pattern (I think ParentModel_Property).
Short from hard-coding the ids in the partial view or binding manually from the FormCollection in the controller, is there some way to get the correct ids generated in the partial view so that the model will bind automatically on submit?
This is common problem. Instead of simple partials, use EditorTemplates (special folder for models) and binding will work automatically.
For example look at this question: Updating multiple items within same view
in addition to the answer given by #WebDeveloper
you can also try and create a custom model binder though a little more complex but will add to the ease of posting and binding form value to the objects in long run
have a look here http://patrickdesjardins.com/blog/asp-net-mvc-model-binding
you will have to manually take all the form values and bind them to the model once and then you will be able to use the #HtmlFrom methods on the razor to do anything and you will get all the value inside the objects inside the action methods as you like.
I am new to MVC. I am developing an web application in asp.net MVC. I have a form through which users can get registered, after registration user redirected to ProfileView.aspx page. till here everything is fine.
Now I want to show the articles headings posted by that user right under his profile.
Right now I m using following code:
public ActionResult ProfileView(int id)
{
Profile profile = profileRepository.GetProfileByID(id);
var articles = articlesRepository.FindArticlesByUserID(id).ToList();
return View("ProfileView", profile);
}
Thanks for helping in advance
Baljit Grewal
I can think of two options:
Use the ViewData dictionary to store the articles.
public ActionResult ProfileView(int id)
{
Profile profile = profileRepository.GetProfileByID(id);
var articles = articlesRepository.FindArticlesByUserID(id).ToList();
ViewData["Articles"] = articles;
return View("ProfileView", profile);
}
Or, if you want to avoid using ViewData, create a ViewModel. A ViewModel is kind of a data transport object. You could create a ProfileViewModel class like this:
public class ProfileViewModel
{
public Profile Profile{ get; set; }
public IList<Article> Articles { get; set; }
}
or just include the Profile properties you are using in your view, this will make binding easier but you'll have to copy values from your Model to your ViewModel in your controller.:
public class ProfileViewModel
{
public int Id{ get; set; }
public string Name { get; set; }
.......
public IList<Article> Articles { get; set; }
}
If you go for this last option take a look at AutoMapper (an object to object mapper).
you will want your page to inherit from ViewPage and then you can use your model inside the .aspx markup like