I just discovered that Visual Studio 2019 wouldn't rebuild my Entity Framework models. Even if I right clicked the EDMX diagram file and selected, "Run Custom Tool" nothing would happen. Lot of posts here and elsewhere said to also Run Custom Tool on each *.tt file. But that wasn't possible since the "Custom Tool" property of all *.tt files was not set. At first I figured I'd use the same custom tool indicated on my .edmx file, which is EntityModelCodeGenerator.
Solution: The *.tt files need to have TextTemplatingFileGenerator set as their Custom Tool.
Set the Custom Tool property of each of your *.tt files to TextTemplatingFileGenerator.
Every time I want to add an Entity Data Model using "EF 6.x DbContext Generator" to my VB.Net project, this warning appears instead of "Entity Data Model Wizard":
Running this text template can potentially harm your computer.Do not run it , if u obtained it from an untrusted source
Click OK to run the template
Click Cancel to stop the process
And when I click OK no wizard is showing. just two .tt file are added to the project. These .tt files are opened as text files.
I tried this with several new projects and this error happens everytime.
I have Microsoft Visual Studio Enterprise 2017. Version 15.7.6
The correct way of adding a new Entity Framework Model using the "Entity Data Model Wizard" is selecting ADO.NET Entity Data Model in the "Add New Item" window instead of EF 6.x DbContext Generator.
But that warning will still show sometimes.
go to path:
Tools > Options-> Text Templating ->Show Security Message set False
I have recently updated to Visual Studio 2015. Opened up my solution and works. Till I decided to add in an entity to my edmx. So I double-clicked on the edmx file to open the diagram like it should or maybe the model browser at least but it only opens an XML page. I checked any missed installation from the setup but didn't find anything about entity framework there. I tried to create a test solution and create another edmx but ADO.NET entity is missing as well. What is going on? Am I going to revert back to Visual studio 2013?
For me, the sequence was:
Double-click the .edmx file
Right click any white space in the opened diagram
Click Model Browser in the context menu that appears
If it opens as XML then it means that eventually XML Text Editor is set as default program to open edmx file. You can follow these steps to open in ADO.NET Entity Data Model Designer
right click on your edmx file
and select open with and select the option as show in below image.
http://i.stack.imgur.com/D49Ki.png
Alternate solution as the upvoted answer didn't work for me in VS2017:
Under the menu bar ribbon -
Select 'View'
Select 'Other Windows'
Select 'Entity Data Model Browser'
we're using Visual Studio 2013 Update 4 with Entity Framework 6.0.2.
Our process for adding new tables, and new pocos is described in these steps:
Define new tables in the database project.
Publish the database to localdb server
Open EDMX-Designer and right click somewhere in the designer and select "Update Model from Database..."
Save the EDMX
The Code-Generator re-creates all pocos under the edmx-name.tt file inside of the edmx-name.edmx container.
In most of the cases everything works fine! In some cases the code-generator removes certain files from the source control. Most of the files existed already before the "Update from Database..." process, and were already under source control. I have to right-click the edmx-name.tt file and select "Add files to source control" to fix this.
This is a nightmare for the development process in the team! If it would happen always, I would always check the pocos by myself before checking in. But it is totally random, I can not see a reason why this is happening.
Is anyone experiencing problems like that? How can we fix that?
(I have had problems like that with other Versions of EF, too)
You should not have generated files under source control. If you remove them, but keep your entity model, them this will not be an issue.
If you build the edmx file from the database and then the db changes, how do you get the model to pick up the change?
Do you delete the whole model and regenerate or can you detect changes?
I see a post mentioning a "Update Your Model" rt. mouse command on the edmx file, but I dont see it.
Updating your edmx to reflect changes made in your db (.net linq-to-entities)
I'm just starting out.
Are you looking at the designer or code view? You can force the designer to open by right clicking on your EDMX file and selecting Open With -> ADO.NET Entity Data Model Designer
Right click on the designer surface of the EDMX designer and click Update Model From Database...
All entities are refreshed by default, new entities are only added if you select them.
EDIT:
If it is not refreshing well.
Select all the tables and view-s in the EDMX designer.
Delete them.
Then, update model from database
I have found the designer "update from database" can only handle small changes. If you have deleted tables, changed foreign keys or (gasp) changed the signature of a stored procedure with a function mapping, you will eventually get to such a messed up state you will have to either delete all the entities and "add from database" or simply delete the edmx resource and start over.
This might help you guys.(I've applied this to my Projects)
Here's the 3 easy steps.
Go to your Solution Explorer. Look for .edmx file (Usually found on root level)
Open that .edmx file, a Model Diagram window appears. Right click anywhere on that window and select "Update Model from Database". An Update Wizard window appears. Click Finish to update your model.
Save that .edmx file.
That's it. It will sync/refresh your Model base on the changes on your database.
For detailed instructions. Please visit the link below.
EF Database First with ASP.NET MVC: Changing the Database and updating its model.
Update CodeFirst Model is not possible automatically. I don't recommend either.
Because one of the benefits of code first is you can work with POCO classes. If you changed this POCO classes you don't want some auto generated code to destroy your work.
But you can create some template solution add your updated/added entity to the new model. then collect and move your new cs file to your working project.
this way you will not have a conflict if it is a new entity you can simply adding related cs file to the existing project. if it is an update just add a new property from the file.
If you just adding some couple of columns to one or two of your tables you can manually add them to your POCO class you don't need any extra works and that is the beauty of Working with Code-First and POCO classes.
Here:
Delete the Tables from the EDMX designer
Rebuild Project/SLN (this will clear the model class)
Update Model from Database(readd all the tables you want)
Rebuild project/SLN (this will recreate your model class including the new columns)
You need to be careful though,
You need to setup the EDMX file exactly as it was before deleting it (if you choose the delete/regenerate route), otherwise, you'll have a naming mismatch between your code and the EF generated model (especialy for pluralization and singularization)
Hope this will prevent you some headaches =)
Double click on the .edmx file then right_click anywhere on the screen and choose "Update Modle From DB".
In the new window go to the "Refresh" tab and choose the changed table/view and click Finish.
I just had to update an .edmx model. The model/Run Custom Tool option was not refreshing the fields for me, but once I had the graphical designer open, I was able to manually rename the fields.
I've been working on a project, not too large, that incorporates Entity Framework, about a dozen tables, and about 15 stored procs and functions. After weeks of development, attempting to refresh my tables and stored procs has yielded mixed results as far as successfully updating the model. Sometimes the changes are effective, most times they are not. Simple column changes (changing order, adding, removing, or renaming) sometimes works, most times does not. Visual Studio seems to have more problems with refreshing than just adding new. It also exhibits more problems with stored proc changes not being reflected, especially when columns are added or deleted or renamed. I have not detected any consistent behavior so i can't say "This type of change will always be updated and this type of change will not".
End result, if you want 100% effective solution, delete the EDMX file from the project, "Add new" item to project (ADO.NET Entity Data Model), and make sure you use the same name for the Model Name. This works every time.