问题
I'm trying to add a controller in my ASP.NET MVC project.
I am using Entity Framework Code First (5.0), and when I right-click the Controllers folder in my project and selecting Add Controller:
After selecting MVC controller with read/write actions and views, using Entity Framework and other settings, I get this message:
There was an error generating '{0}'. Try rebuilding your project.
Update
Seems that the special constructor I added to the DbContext caused the problem. After commenting out the constructor, it's working back again, however this message appeared:
Anyway I checked the activity log and found no info regarding that issue or any record at the occurrence timeline, should you know what this is all about, please comment on.
回答1:
Seems that the special constructor I added to the DbContext caused the problem. After commenting out the constructor and re-compiling, it's working back again.
Perhaps I should wrap the constructor contents in a conditional statement that is skipped at design-time, meanwhile commenting-out is enough for me.
回答2:
"Build the application before going on to the next step. If you don't build the application, you'll get an error adding a controller." "If you get an error, you probably didn't build the application before starting adding the controller." You must run project, probability. http://www.asp.net/mvc/overview/getting-started/introduction/accessing-your-models-data-from-a-controller
回答3:
Just have an empty DbContext subclass when adding the controller. Then it will work fine for you...
回答4:
If you are on Windows OS press CTRL + SHIFT + B to build the application then try again to add Controller
来源：https://stackoverflow.com/questions/16035939/cannot-add-controller-in-asp-net-mvc-project