When debugging ASP.NET MVC app, breakpoints are not hit

Question

When trying to debug a ASP.NET MVC app, the breakpoints in my controllers arent getting hit. When entering debug mode they just show an empty red circle with a warning trian

Answer 1

I had the same problem. Check here: Tools->Options->Debugging

Check the script check box. Run the application.

I got installation corrupt message box, so did a repair of vs 2008, and its working now.

Answer 2

Quick fix...

Run my project in Debug. Cleaned and rebuild solution (MVC).

Re run the UI project and the Breakpoints started working again.

Hope this will help someone.

Answer 3

Change in Visual Studio Header Release option to Debug

Answer 4

I had Shelved my changes in TFS and had a breakpoint set on a shelved cs file that was not part of the solution anymore. Once I retrieved my Shelveset, everything worked.

Answer 5

Few more possibilities:

• If you have a client and server in your solution (lets say a WPF and WCF app) you should make sure you select 'multiple startup projects'. [this one is similar to your accepted answer, but useful if you need a client running too]

• Release mode is selected for the project. When doing a fresh get (as I discovered today) on a new machine VS seems to like to switch to 'Release' configuration profile.

Answer 6

Make sure that your compilation framework version is the same as your project's compilation framework.. I ran into this and it was because the project was being compiled as 4.5 and the compilation attrib in the web config was trying to debug it as 4.5.1.