Used the "ADO.NET Entity Data Model" Wizard.
Gave the corresponding connectivity and once the wizard completes, the .edmx file opens with the diagram containing my table structure.
But the Model Class file is not created.
How to overcome this error?
I even build the solution, also checked by using "Show All Files".Nothing works out.(using VS2010 SP1, EF6)
Deleted the project and tried again and then was able to find the model file.
This is not the correct answer but as it solved the issue, this might be an answer for this issue.
Related
I am using VS 2015 and created MVC project. Now I have created tons of edmx files with SQL server database but I am facing issue with MySQL database.
At certain point, wizard got disappear and not able to add edmx file to project.
In above picture, after selecting EF Designer from Db, I select connection.
then i come to this screen and as i press next button, it just got disappear and nothing is happening.
I dont know if its problem with VS 2015 or something else?
Really need help with this.
For the project I am working on, we have updated the database with two extra datatables that I now would like to add to the edmx file, but this gives an unwanted result.
What I do is open the edmx file, open the model Browser and run Update form database. In the wizard here I choose the two tables I want to add under the add tab and click finish.
The tables show up in the diagram view and in the Model browser under Model.Store-Tables/Views (and under Entity Types and EntityContainer). So far so good.
When I then save the changes to the edmx, all other existing entities,as well as the complete content of the Model.Context.tt file are deleted. The result being that the context entity and all underlying entities no longer can be found.
I do not understand why this is happening, and I don't know how to fix this and I am now stuck in the development of the project. i am using VS2015 and Entity Framework 6. I have spend most of the day to find a solution, but have not been able to do so. None of the "Entity can't be found" solutions around fixed my problem. I hope therefor that some smart minds here can help.
Thans!
I have an Entity Framework 6.1 'Code From Database' based project and now I need to add more tables from the database to my code.
I've spent an hour now trying to figure out how to open the Wizard to add more tables to my project.
Am I missing something or are we not able to modify a 'Code from Database' project to bring in more tables?
You can add a new item to your project: Visual C# -> Data -> ADO.NET Entity Data Model. Select Code First from Database, select the objects needed and it will generate a model class (DBSets, Fluent config, etc) and the POCOs. I've got a big database I've been bringing over in chunks that way. https://msdn.microsoft.com/en-us/library/jj200620.aspx
There is no option to edit an existing 'Code from Database' import. I ended up creating the new POCOs by adding a new data model and then deleting the newly created DbContext after moving it's DbSet<> properties into my existing DbContext.
This was quite easy to do but I was only adding a couple of tables.
I am creating an MVC 5 Web Application with Visual Basic using Database First Approach. Recently I updated ALL NuGet packages and after that I'm unable to create Models from the Database.
As shown below, I can not select Tables and other DB objects from Database to include in my Model.
When I click finish, it generates an empty model as shown below:
One more weird thing I noticed is: As shown in this tutorial, it should show me a checkbox that says, Enable Extended Transact-SQL verification for common objects, but when I open the properties of my project, it doesn't show me this checkbox.
Now, my questions are:
If as I doubt, a NuGet package update has created this problem; which
package is it?
Is it possible to uninstall updates of NuGet packages
(as we do with Windows Updates)? If yes, How?
Any help would be appreciated. Please note that,
I've experience in Web Forms but I'm a beginner in MVC.
This issue
has started just after, I updated ALL packages when I was facing
this type of issue.
I created 3 projects with the same approach
before this update, and I succeeded every time generating the Models
from Database.
Please suggest!
Right click the .edmx file in the solution explorer and select 'open with..' Select the XML editor and open the file. Check if there are any errors in the file. Errors may show in the error list window or may show as comments in the file.
I am using self tracking entities and have moved the entity classes to another assembly by using 'Add as link' to point to the TT file as mentioned here. Now though, when I update the model (for instance change a property name) the template is not automatically run and so the entity class does not get updated.
I can of course manually run the template to get the updates, but it would be easier if it ran automatically in the way it did before I moved the classes. Is there any way to achieve this?
Darren.
I've not done this but I suspect the following is possible. Mark the model with a custom tool (see under properties of the file in solution explorer). Then create a small program (see here for an example) that will execute a the TT's run custom tool.
I have not run into this issue. Usually when i save the model or build the project which contains my edmx file, the code files for my entities are updated. can you share your project with me through direct email. I wouldn't mind trouble shooting the problem and then following up with team if we cant get it to work.