I created Model1.edmx file and accordingly Model1.Designer.cs was also created.
I decided to copy all code from Model1.Designer.cs to dal.cs file and deleted Model1.edmx + Model1.Designer.cs files.
When I try to connect I get error that mapping is failed and no SSDL,CSDL are found.
Is there any way to use Linq To Entites without .edmx file, but just using the code in Model1.Designer.cs?
If you define your mapping in EDMX there is no way to use it without EDMX. EDMX is necessary because the build process will decompose the EDMX files into multiple resources specifying mapping between classes and database. These resources are used at runtime.
If you don't want to have EDMX file you can't use it at all and instead you can try code first approach (more tutorials are available on that page) in Entity Framework 4.1. You can also use helper EF Power Tools to generate code mapping from existing database for you (it can be good to start learning how to map tables from code).
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Iam using EF 6 with database first .. and every time I update the scheme : all my editings to the edmx file (mainly for defining db built in functions) are lost .. but using code first I can add my dbmodelbuilder calls in a separate file with partial class .. and by that I can also use all the nuget packages that targets code first such as EntityFramework.Functions.
Thanks for helping
You can use Code First from database option when you are creating your ADO.net entity data model. This will give you the code first classes that you can edit.
After creating your model you would need to stick to using the code first model otherwise you will need to regenerate your code-first after every database change...
Download the EF tools here.
I'm using a database-first process. I've got hundreds of tables imported into my EDMX and generated CUD procs imported as well. The generated CUD procs use a naming convention based on the table name and he CUD operation.
How can I write some code to open the EDMX, associate the CUD procs with the proper entities, and save the EDMX?
This is a lazy-developer, design-time task - this will not be happening at runtime.
Well, what I wanted was a free library which contained the object-model representation of the EDMX. This would allow developers to edmx.Load(pathToEdmx), query the object-model, make changes, and edmx.Save(). Apparently, such a library doesn't exist.
So, I wrote some code to load the XML, query the XML, make some changes, and save. Not as rich as an object-model with validation and helpful exceptions (and very prone to typos), but it worked.
I am just starting out with EF Code-first:
If I create a read-only EDMX file from my code first can I save this readonly file as a stand-alone file and then include the resultant file in my project without affecting code first implementation.
Even though I am doing code first, I like a picture as it helps when I am explaining the db model to others. But I do not want to included this if it effects the code-first approach
will adding the EDMX file to the code-first project cause problems with the code-first approach?
No it doesn't have any effect on your code First approach. You can add the .edmx file directly to your project from Add-> New Item and generate the model from database without affecting your code-first approach. Just remember to use different namespaces so you don't get namespace conflict between your code-first and model classes.
To remove the Model, just remember to delete the related connection string in app.config/web.config to prevent your config files from becoming messy.
In Entity Framework, is there any way to make edmx file to automatically create entity when a table is added to the schema in the database and delete entity when a table is removed from the schema at run-time?
There is no EDMX file at runtime - there are only mapping files which are static XMLs. There is no mechanism controlling your database and modify these files if database changes (moreover as #marc pointed which files should be modified if you have more then one model?).
This is even doesn't make too much sense if you try to do it manually. Adding table to mapping is not enough - you also need a class and code which will use that class - both added at runtime.
There are more problems related to this. EF is tool configured at design time. The only exception is loading configuration classes for EF code first but again configuration classes are created at design time (I intentionally skip any ridiculous approaches with emitting MSIL at runtime).
I want to generate Entity Framework 4.0 classes from a (legacy) database from a command line, but I have 2 transformations I want:
Tables/columns are lowerCamelCase and I want my classes/members to be UpperCamelCase.
I want to suffix my classes with "Dto".
Any idea how this might be accomplished? I'm a total newbie to EF, but I have a decent understanding of Linq to Sql and was able to accomplish the same task by doing: sqlmetal -> dbml -> xml mapping file and .cs file.
The EDMX is also XML. If you're comfortable with XML transformations, just change the CSDL section of the file per your renaming rules. Then do a full build on your app and the code should be regenerated. To do this from the command line, use EdmGen, which comes with the framework. The free EdmGen2 utility is worth a look; it may already do some of what you need.