Entity Framework 6 - Knowledge Base (KB)
45 results for: in tag: edmx
Entity Framework Merge Nightmare
We've adopted the Entity Framework and we're finding that when multiple people make isolated changes in their individual source control branches, there are massive conflicts when they come together in a merge, resulting in broken model files....We're lean...
asked by ctorx
Tables don't show when re-adding them to entity-model (edmx)
I have a db with 5 tables. At the beginning, I've added those tables in, but then decided to remove some due to some relationship compile error....Now, when i want to add them back, i'm opening the edmx file -> update model from database... I don't see th...
asked by Or A
EDMX connection string
so the story is like this....I have a project, called PA.DLL, which have an entity model inside of it (edmx) file....In another project which i'm referencing to the PA.DLL, i copied the connection string that was created (automatically) when creating the...
asked by Or A
Exporting a large Entity Framework Diagram
I have a fairly large Entity Diagram. I tried to export it to an image, unfortunately because it's so large the image comes out all pixelated....See this link ...http://connect.microsoft.com/VisualStudio/feedback/details/534574/edmx-model-image-export-pix...
asked by Stephen Lacy
How to properly delete and re-add Entity Data Model
newbie to Entity Framework here. Using VS 2010 and SQL Server 2008 express DB....I was having trouble refreshing an Entity Data Model after adding new tables. So, I followed a suggestion I found here to just delete and regenerate the model....I get to t...
asked by David
Create a Dropdown List for MVC3 using Entity Framework (.edmx Model) & Razor Views && Insert A Database Record to Multiple Tables
After reading 100's of articles on here about how to create a DropDown List in MVC 3 with Razor Views, I could not find one that fit my case....Situation:... I am ultimately trying to create a View to Add an Employee to a Database....Here is an image of t...
asked by Timothy Green
No Entity Data Model (EDMX) Template with Visual Studio 2010 SP1 & ADO.NET Entity Framework 4.1
I'm having a lot of issues with the templates of Visual Studio 2010 SP1 & ADO.NET Entity Framework 4.1...I noticed that other people had these problems, and asked similar questions, but I don't think they gave enough information to make it solve-able....T...
asked by Jarred Sumner
Entity framework - create the csdl, ssdl and msl files
I work with EF 4 (not with Self-tracking entities currently). I've added some columns (non of them is a key and all of the are nullable) to one of my entities, and got the ...Number of members in conceptual type does not match with number of members on ob...
asked by Noich
Error: "The specified LINQ expression contains references to queries that are associated with different contexts"
I am receiving the error shown in the title from a LINQ query that includes two tables from two different edmx files. Here is the query:...var query = (from a in db1.Table1 join b in db1.Table2 on a.Id equals b.Id orderby a.Status ...
asked by Ashiq A N
Tool to convert Entity Framework EDMX to Code First
Is there a tool to convert an edmx into code-first? I know there was talk of one appearing in a CTP a while back, but I can't find any updates relating to this....There's a guy on the ...MSDN forums... who has written his own (not available yet), but not...
asked by SturmUndDrang
ASP.NET MVC3 Entitiy Framework - The EntitySet 'x' specified as part of this MSL does not exist in MetadataWorkspace
I'm making an reservation system....The following query ... Reservatie r = (from res in entities.Reservaties where (res.datum == date && res.tijdslot == time) select res).FirstOrDefault(); ...gives me the following error...Error 54 ...
asked by tortuga
How can I generate the database from .edmx file in Entity Framework?
I have had to suddenly switch to working on Code First Entity Framework 4.1. I started off not knowing anything about this framework but in the last 8 hrs I am now much more comfortable having read blogs and articles....This blog in particular... is one o...
asked by Red Swan
How to prevent from DataAnnotations Attributes being deleted in DataBase First Model
I have my asp.net mvc 3 application with entity framework and i used the Database First model to set it up....My Steps below: 1. Genarated a database with tables 2. Created ADO.NET Entity Data Model file (.edmx) and imported the tables 3. inside the de...
asked by python
How do you update an edmx file with database changes?
I have an edmx file and I changed a table in my database. I know that there is an "Update Model from database" wizard, however in many cases this is useless....For example if I change a field from non null to nullable or if I remove fields the update mod...
asked by dtc
Relax or disable table constraints when using Dapper and Entity Framework?
I would like to set a do something like this ...dataSet1.EnforceConstraints = false;... using the Dapper.Net ORM and Entity Framework....I created the models in VS2010 where a property:... [EdmScalarPropertyAttribute(EntityKeyProperty=false, IsNullable...
asked by ElHaix
Provider connection string from Entity Framework
If you are using object contex data model (with EDMX file), during its creation you might want to specify the connection string inside your config file. ...The connection string is unfortunately not the common connection string as it contains some ...thin...
asked by Mirek
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 run...add-migration... yet. Then I added an EDMX model to play around ...
asked by Benjamin
How to join two table from two different edmx using linq query
How to join two table from two different edmx using linq query.. Is there a way to query from 2 different edmx at a time....Thanks.
asked by John Hawkins
Enum Support for Entity Framework Database First
I can find a bunch of tutorials on how to implement enum support for model first and code first like these:...http://msdn.microsoft.com/en-us/data/jj248772.aspx...http://msdn.microsoft.com/en-us/data/hh859576.aspx...Can anyone explain to me or provide me ...
asked by TMan
System.Data.MetadataException: Unable to load the specified metadata resource
My connection strings are as follows:...<add name="RollCallDBEntities" connectionString="metadata=res://System.Engine/RollcallNS.csdl|res://System.Engine/RollcallNS.ssdl|res://System.Engine/RollcallNS.msl;provider=Devart.Data.Oracle;provider connection st...
asked by Meysam Savameri
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