I have a project that is using Entity Framework Code First but with an Existing Database. So far I have been creating the class for each existing table accordingly and it's all worked out great. What would be brilliant is if there was some way to quickly generate a table to a class to save time on manually coding each class, any ideas? I want to stay with Code First so please don't suggest alternatives, thanks.
You can use EF database first - that will generate .cs classes you can use as a base. Just copy the CS code and then delete the EF database first stuff.
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I am having an issue with my website(ASP.NET, c#, SQL, Code-first Entity Framework).
I have a project with an attached SQL database generated from code first entity framework.
Now I have imported another SQL database using model first database which looks almost same but the table and column names are different.
So now I would like to write data to two databases at the same time with just one click from my web application.
The newly attached database will be a backup and we should write data to both databases at the same time.
Any suggestions would be highly appreciated.
Thanks
As others have suggested, you need to do the mapping yourself, but one thing I would like to add, you may need to wrap your SaveChanges() into a transaction, you may find steps here: https://msdn.microsoft.com/en-us/data/dn456843.aspx
I need to upload a project from Visual Studio to Azure, but I have to share the same DB with other projects. So I guess I need to rename all my models that creates the tables in the DB to prevent any conflict with other projetcs model/tables!?
I started to change the name of one the model and then continued to change in the code and also in IdentityModels.cs file, but will this really work? Do I need to change in other files also? One way to simplify it all, would be to use search and replace, but then I have no control of what is changed!
Any good advice how to replace name of table in DB and all instances?
i think there is a migration plan if you change your model after creating the data base
link :
https://msdn.microsoft.com/en-us/data/jj591621.aspx
I created a C# data layer using Entity Framework 6 via the Code First From Database wizard which defined all of the C# classes which represent their respective tables.
There was a table that I missed and I'm looking for a way to generate another class to represent the table.
Is there a way to have this class created after the initial wizard has already been run?
The reverse engineer tool is meant to be used once in code first. Once it has been used you would just add the class that represents the table along with the other entities. If you are adding tables in the database after you have used the wizzard then you are not truely using code first. Just add a POCO class to the entities folder the tool generated and model it after the others. Once you have done that you use the package manager console to add-migration which aligns it back with your schema, next you use update-database to push the changes back to SQL Server.
I have added added Entity Framework to my project and selected Code first from database when creating my models. But the problem is, i couln't find how find how to update existing models and add new models to my project when i make changes on database.
It is very straightforward. Switch on migrations, change/add you classes, create a migration and update your database. See here for example. There are plenty of other sources.
When you change your DB you can run the EF generation again but it will overwrite the existing files so you will lose any changes. If you want to maintain code outside the generated files then you can use partial classes. Or alternatively just code them by hand after the initial auto generation, it's quick once you get used to it! :)
Is it possible to automatically convert a lot of C# classes to SQL Server database tables ?
I need to import some xml files into SQL Server but using SSIS the runtime stops working as soon as I select the xsd file. However I easily converted the xsd to class files so that's why I am asking if its possible to have a workaround...
You can use Entity Framework Code First functionality, with a little extra work to get the tables done in your database.
There you have a good post on it by ScottGu
Yes, it's possible to automatically do this. Entity Framework has a model called Code First, which essentially does this: takes your C# classes and creates the database and tables automatically for you.
Take a look at this post by Scott Guthrie.
Other option you might test is DataSet.ReadXml() function. Drawback is the Dataset can't handle complexType="mixed", but it deals well with large files (my files had about 50M each). All tables and columns are named by XML tags and relations are autogenerated by DataSet itself.