Covers the Entity Data Model-part of ADO.NET
Covers the Entity Data Model-part of ADO.NET
Questions tagged [ado.net-entity-data-model]
505 questions
38
votes
8 answers
Oracle ODP.Net With Entity Framework 6 - Entity framework database compatible provider could not be found
I am trying to build an MVC 5 Web application with Entity Framework 6 that works on Oracle Database , am trying to use ODAC 12c Release 3 which includes support for Entity Framework 6 Code First and Code First Migrations; NuGet, .NET Framework…
Wasef Anabtawi
- 1,011
- 1
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- 17
33
votes
3 answers
there is no ado.net entity data model in visual studio
After installed Visual Studio 2013 and create a new MVC4 internet application project :
Visual Studio Doesn't have Ado.net Entity Data Model when i click on add->new item->
Why?
I reinstall it but ther is no change ...
user2830448
- 427
- 1
- 8
- 20
33
votes
9 answers
Entity Framework Migrations Error - Sequence contains no elements
command: add-migration blahblah -verbose
error: Sequence contains no elements
I did a few things before getting this error. I made a change to my code-first model but did not runadd-migration yet. Then I added an EDMX model to play around with an…
Benjamin
- 3,134
- 6
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- 57
29
votes
13 answers
Missing "Ado.Net Entity Data Model" on Visual Studio 2013
I have created new web project but I can't find ADO.net Entity DAta Model to add it.
How to fix it or Install it ?
Chlebta
- 3,090
- 15
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- 99
28
votes
13 answers
Can't Create Entity Data Model - using MySql and EF6
I'm trying to add an edmx Entity model to my C#/Web Project in Visual Studio 2013. My problem is that the file is not created.
I do the following steps:
Give the item a name
Choose 'EF Designer from database'
Choose the connection from the drop…
Liron Harel
- 10,819
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27
votes
2 answers
Entity Framework 4: Does it make sense to create a single diagram for all entities?
I wrote a few assumptions regarding Entity Framework, then a few questions (so please correct where I am wrong). I am trying to use POCOs with EF 4.
My assumptions:
Only one data context can exist for an EF diagram.
Data Contexts can refer to more…
Zachary Scott
- 20,968
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27
votes
8 answers
ADO.NET Entity Connection String for Multiple Projects
I am using multiple layer project where the DataModel hosts the ADo.NET Entity model and DataAccess layer does the validation.
However everytime I get a error like this
The specified named connection is either not found in the configuration, not…
Sumanta
- 1,165
- 4
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22
votes
7 answers
References for DBContext, DBSet<> in Entity Framework
I am trying to use ADO.Net Codefirst feature of latest Entity Framework 4.0. As part of that I have installed Entity Framework CTP 4 from Microsft and using Scott's tutorial to create the model first. Inside the tutorial DBContext and DBSet<> is…
manu
- 1,807
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- 32
20
votes
10 answers
Your project references the latest version of Entity Framework... - Error
I trying to create an entity data model with Oracle. I am getting this error.
I have these installed for my solution.
I have also installed ODT for VS 2015.
These are my references showing.
Web.config
who-aditya-nawandar
- 1,334
- 9
- 39
- 89
20
votes
6 answers
Returning datatable using entity framework
I am using entity framework. There is one particular situation in my application where I have to use a stored procedure. Since there are a lot of SQL statements written in the SP, I don't want to re-write it in my C# code. I only need to get the…
user1640256
- 1,691
- 7
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- 48
19
votes
1 answer
Columns of two related database tables in one ASP.NET GridView with EntityDataSource
I have two SQL Server tables with Primary Keys (PK) and a Foreign Key (FK) linking the two tables:
1) Table "Order"
OrderID, int, PK
AddressID, int, FK
...
2) Table "Address"
AddressID, int, PK
City, nvarchar(50)
...
Then I've created an…
Slauma
- 175,098
- 59
- 401
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17
votes
2 answers
Entity Framework - CSDL, SSDL, and MSL files
I'm just being picky but I was researching how does Entity Framework generates the DLL from an EDMX file and I saw this on msdn:
The Entity Data Model Designer (Entity Designer) stores model and mapping information in an .edmx file at design time.…
Diego
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16
votes
6 answers
Entity Framework: Setting a Foreign Key Property
We have a table that looks roughly like this:
CREATE TABLE Lockers
{
UserID int NOT NULL PRIMARY KEY (foreign key),
LockerStyleID int (foreign key),
NameplateID int (foreign key)
}
All of the keys relate to other tables, but because of the…
Rob
- 3,276
- 2
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16
votes
9 answers
Metadata file not found - Data.Entity.Model
Anyone having similar problem, while creating webservices?
Compiling transformation: Metadata file 'D:\Program
Files\VS2013\Common7\Tools..\IDE\Microsoft.Data.Entity.Design.dll'
could not be found D:\PROJEKTY\apki\ws2\WS\WS\DataModel.tt
I…
ignacy130
- 322
- 1
- 2
- 17
15
votes
1 answer
Entity framework: StoreGeneratedPattern="Computed" property
I have a DateTime property. I need this property's default value to be DateTime.Now. And then I found out that you can specify an attribute StoreGeneratedPattern="Computed" and set it to (getdate()) in SQL. This works successfully. But I can't…
ebattulga
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