I am new to both MVC and the simple membership that comes with ASP.NET.
I have been following tutorials and I have been able to create the Simple membership tables to work in a custom db along with my own tables.
I ran into a problem when I tried to use the ADO.Entity Model to create classes so i could access the database data. When i tried to run the application after creating the entity models i got an error. I think it is because the ADO.Entity Model created classes with the same name as classes all ready in the app???
Error 1 Missing partial modifier on declaration of type 'MvcApplication5.Models.UserProfile'; another partial declaration of this type exists C:\Users\user\Desktop\MvcApplication5\MvcApplication5\Models\AccountModels.cs 22 18 MvcApplication5
Any help would be greatly appreciated
Thanks
SimpleMembership uses EF code-first so you do not need to create the classes, they are already created by the T4 Internet Template. The class that represents the UserProfile exists in the file referenced in your error message. You are getting an error message because you are trying to create a duplicate of the class that already exists. Take a look at this article on how to customize SimpleMembership.
Related
I am working on ASP.NET Core MVC Application that uses Entity framework Core. So everything seemed ok but somehow i came up with an interesting question and couldn't find the answer in the web.
Here what i know.
When we use EF Core it gives us ability to represent database tables as classes and to work with them. I have a CONTEXT.cs class that creates entities, gives them properties corresponding to database.
Here is my question
If a model is a class then where is the constructor? Or that is done when i "create" something and the whole info comes to controller like this( [Bind("id", "name") ]Materials materials) and data is simply being added to context
Thanks in advance. Please correct me if i'm writing anything wrong
I think that this link will answer the first part of your question:
https://learn.microsoft.com/en-us/ef/core/modeling/constructors
And about binding models which coming from controller actions. At least in previous versions, the data was set through public field setters that can implement complex logic. For example, a boolean setter can actually add a value to a private List when assigning a 'true' value.
I am creating an MVC project with .NET. A database already exist and I'm using the Entity Framework to access the database.
One of the tables in the database is called "System". EF therefore creates a class by that name. This obviously a conflict with the "System" namespace.
Renaming the table is not practical at this point. Is there another way I can use EF for my project?
Thanks
It's not a problem, you simply need to reference the class through its namespace.
e.g.:
If your generated entity class is under the namespace AppName.EntityModel, the following would work
global::AppName.EntityModel.System
AppName.EntityModel.System
EntityModel.System // if already under the AppName namespace
So far I had understand that model in MVC is to construct data structure, such as store/access data from database. But then I got loss on how to construct a success structure.
Within a database, there are say, 5 tables. Shall I first making a namespace that consisted all tables into DbConText and followed by construct all tables into Dbset?
Is there any article that help for linking a built DB, and demostrate the steps on how to do?
In Mvc it is very simple for create a model. You just follow the following steps..
http://nerddinnerbook.s3.amazonaws.com/Part3.htm
I have generated xxxModel.Context and xxxModel template (in Models) from an existing database using EF 4.1 on ASP.Net MVC 4 application. After that when I build the project it gives the error for all the Model classes (POCO) saying "The type file name already contains a definition for memeber variable name". Where am I going wrong?
Thanks for help.
Clearly the file DESE.cs (and others) already contains identically named classes with properties - which are clashing with the types generated by EF. CC_Names.cs, for example, is being output by a text template - so I'm assuming you've got more than one code-generation strategy going on here from the same database.
And then you also have issues where you've re-declared the partial class CorpCostEntities again in another file with a different base to the one set by the EF code generator.
I think you might need to decide whether you want to use edmx code generation or the text-templating approach and stick to it :)
I have two databases that I am accessing. The first is against a contact database which I connected to using EF Model First; creating the edmx. I have since begun to learn the virtue of CODE First when working with Entity Framework, so I decided I would, in the same project, write the Product database using Code First techniques, allowing the database to be generated from the code I am writing.
Everything compiles fine. The problem occurs when I hit my harness and it attempts to create the Product database and retreive a list of values from one of the tables...
I get the folowing error "Could not find the conceptual model type for 'Core.Data.Account'", when I attempt to enumerate the ProductLines property (Line3 below).
1. using (var ctx = new ProductDb())
2. {
3. var lines = ctx.ProductLines.ToList();
4. this.litOne.Text = lines.Count.ToString();
5. }
After some research it appears that this message may be occuring because of multiple entities with the same name (regardless of namespace), however there is nothing in the ProductDb context with the name "Account".
There is a class in the OTHER context created by the Model First approach named "Account". But how/why would that make a difference? They each point to different databases i.e. different connection strings. Why would the ProductDb be attempting to create a table called Account, when it should be completely unaware of it's exstence?
thoughts?
Thank you as always!,
- G
I bumped into the same problem, but the other way around: first a DbContext + generated database and then generated an edmx off the database (just for a little presentation). It appeared to be a restriction in EF: EF currently has a restriction that POCO classes can't be loaded from an assembly that contains classes with the EF attributes.
The only thing you can do for now is keep the contexts in separate assemblies.