ASP.NET 2.0: Use VB.NET and C# within the App

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ASP.NET 2.0: Use VB.NET and C# within the App_Code folder

30. March 2006

When I was creating my new blog site (this site your looking at), I chose to write it in C#. I had a problem with the App_Code folder because I had some code in VB.NET code and some C# code I needed to put in there. I didn't want to rewrite my VB.NET code in the App_Code folder just so I could write the rest of the code for the site in C#.

Luckily, the ASP.NET Team had already thought about just this kind of circumstance. They implemented a way to partition the App_Code folder into sub-folders, one for each set of code files written in the same programming language. Awesome, I didn't have to spend a couple hours converting code from VB.NET to C#!

Even if you don't use multiple different programming languages for your code files in the App_Code folder, you could use this feature to organize your sets of related code files into sub-folders.

Step 1: Add the following lines to the web.config

Step 2: Create a sub-folder in the App_Code folder for each language you want to support.
For Example:
/App_Code/VB_Code
/App_Code/CS_Code

Step 3: Place your VB.NET code in the VB_Code folder and place C# code in the CS_Code folder.

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General, vb.net, C# asp.net

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Comments

Vincent

4/9/2006 1:19:00 AM #

Good explaination given for using both languages VB and C# in the appcode folder. along with clear documentation on how to write stuff in the web.config file. Steps format of document was very useful.
Thanks buddy

Jersey

5/5/2006 2:50:00 AM #

Great! This is what I was looking for and it works!

Thank you very much.
Serna

PkingROch

6/16/2006 12:16:00 PM #

Unfortunately, Remove is part of the schema in the documentation, but it won't compile...

Chris Pietschmann

6/16/2006 12:51:00 PM #

Remove? What would you use Remove for with this? You don't even need to use Remove.

Ron Kincaid

6/22/2006 8:35:00 PM #

Thanks! Timely, easy and very useful.

The Coder

7/10/2006 6:05:00 PM #

Good work! Just what I needed.

manisha

7/16/2006 10:13:00 AM #

excellent and easy for understanding for us who are now studying the asp.net

vnguyen

7/16/2006 10:34:00 AM #

Is there any way not to use App_Code at all? I migrate my project from 03 and it keeps separating some asp.net code files (.aspx.vb) from the aspx file and put in App_code. Same thing happened with my report files. Any suggestion?

mtran

8/17/2006 1:39:00 PM #

Thanks for the instructions how to setup for both languages.

All Aboard

10/4/2006 12:31:00 PM #

C'mon get aboard the love train!

Mehdi

12/29/2006 12:32:00 PM #

I have a huge app_code folder with many sub-folders. When I make a change in one of the files in App-code folder, the build takes too long. It rebuids all the sub-folders in app_code. Is there a way to get it to build only the changed folder?

Thanks

faizer

12/29/2006 5:09:00 PM #

Thanks a lot! It was a pain to find a way around this problem... But with your help it works now! Thanks again!!!

Chris Pietschmann

12/29/2006 7:35:00 PM #

Actually, the only solution to your problem is to pull out some or all of you classes in the App_Code and compile them into a DLL in the Bin folder. The App_Code folder isn’t really meant to contain large amounts of code.