Questions tagged [database-first]
171 questions
0
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1 answer
asp.net mvc with entity framework database first domain model validations
I'm Developing ASP.NET MVC Web Application project, and I'm using Entity Framework Database First Approach, So I would like to make validations on generated model classes, I know if i make validations on them directly, then my model validations will…
Abdisamad Khalif
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0 answers
How to map database changes in code first approach with existing database?
At the moment I'm using .edmx file & database first approach to develop my application. But whenever a changes occur in the database, .edmx file needs to be updated, which seems a bit too much. Once I heard that we can use code first approach but…
Badhon Jain
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2 answers
When I Fill the Create View and Submit It's throwing a DbEntityValidationException
In this project i was trying a Entity Framework Code First Apporach
Table 'Employee'
Id int NOT NULL
FirstName nvarchar(50) NOT NULL
LastName nvarchar(50) NOT NULL
MiddleName nvarchar(50) …
KH Arif Ahmaad
- 41
- 8
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1 answer
How can I reference two databases using Entity Framework database first?
I have an MVC project with references to two seperate projects, each of which contains an edmx. Each of the two EDMX projects point to a different database. The two databases have tables with identical names - contacts for instance. I need both,…
tintyethan
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4 answers
Different Key in Table relations
I have a database with this structure
TASKs SubTasks
=============================
Id (pk) Id (pk)
Name Name
TaskCode ParentTaskCode
Now I need to connect SubTasks Table to Tasks using Tasks.TaskCode…
Ayman
- 1,387
- 4
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0
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1 answer
Enums and lookup tables in Entity Framwork Database first
I am using Entity Framework Database First approach, and I use enums for the lookup tables.
In database, the "normal" tables have a reference to a lookup tables, example:
Pet table:
Id
Name
PetTypeId
PetType table:
Id
Name
When I do the mapping…
Pedro Perez
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One edmx file, multiple databases with different implementation - support mapping details
I have conceptual (domain) model which is implemented in different ways in separate databases.
For example, inheritance in first db is table per type, second - concrete types are tables, and third - all types properties are merged in one table.…
Olinad
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Best way to use Entity Framework (Database First , Model First , Code First)
I Am Confused To Choose Way Of Use Entity Framework.
What's Differents In These Ways (Database First , Model First , Code First) ?
I Just Started A Medium Project (This Project In ASP.NET MVC And Likely MIS & CRM)
Thanks For Helping Me.
Seyed Ali Mahmoody
- 148
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- 12
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1 answer
Creating a MVC4-Controller using Entity Framework
Hey Guys I hava a question. I know questions like this are asked often, but I worked on a solution for several hours and read many answers but I couldnt find the right one. I am doing an application using ASP.NET MVC 4 Razor. I´m rather new to this…
DanielD
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- 4
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Adding a new field to Model with Database-First Approach MVC3 does not pull data from database
I'm trying to add a new field to an existing database (MS SQL Server) and MVC 3 model using the database-first approach. The database and model structure is very complex and the DB hold lots of data, so it is not an option to drop the database and…
mvc_tyro
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- 1
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1 answer
EntityFramework Database first or Code first
we have a existing MS SQL Database where the foreign Keys are not mapped properly. Furthermore some Views without PKs.
My Question now is should I generate the POCOs on my self with e.g. Reverse Engineer Code first or should I use the…
Rayk
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- 8
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Brand new WPF Application, MVVM, and how to use POCO partical classes generated from ADO Entity Data Model....?
I've asked this before, but I actually still needed help...
Here's the scenario:
I'm starting a new WPF application, and want to use MVVM. Because our DBA has created a database with tables we need to perform CRUD operations on, I used the Database…
user2317150
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- 4
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How can domain model classes (generated by EF 5 Database First) support custom logic when a database update replaces the code?
Please pardon the long-winded title to this post.
Basically, I have an entity model that was generated by Entity Framework 5 using the Database First method. Now I would like to develop those POCO entity classes by adding validation logic and…
BCA
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( MVC3/Entity Framework) How to perform CRUD operation in a database that uses Candidate keys as foreign keys
I am a complete beginner in MVC3 and web development in general.
My client database uses unique candidate key of one table as foreign key of another. I cannot change the way the database is designed whatsoever. I have models derived from the…
Mikey
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- 2
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why the detached entity is modified successfully in entity framework 5?
my code is .
class Program
{
static NorthwindEntities context = new NorthwindEntities();
static void Main(string[] args)
{
Order updateorder = new Order() { OrderID = 10256, ShipCountry =…
mostafa apple
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