When you first build an ePortal Web Forms presentation project, ePortal generates a Web Forms page for each client message in the corresponding data source project. In particular, ePortal generates the following files:
<client-message-name>.aspx - The Web Forms page containing HTML markup with ASP.Net controls.
<client-message-name>.aspx.cs - The Web Forms page code-behind file, containing C# code.
After the first build:
If a generated file is deleted, the entire file is regenerated when you build the presentation project.
If the code-behind file already exists, the code in the dynamic region of the file is completely regenerated, if necessary, when you build the presentation project; however, the rest of the file is not regenerated.
The code-behind file contains C# code that executes on the web server system when the web page is loaded and submitted. For an application in production, the web server system is the ePortal platform. When you test your presentation project during development, the web server system is your development system.