问题
I'm trying to add a view to an ASP.NET MVC 5 project in Visual Studio 2013, but the Add button is greyed out.
回答1:
I got this for ages, all I did was upgrade the nuget packages for Mvc and it fixed it. I suspect that I had a mismatch of versions in the solution.
Update-Package Microsoft.AspNet.Mvc -Version 5.2.3
The version part is optional, but it should mean that all projects get the same version.
回答2:
Different from the OP issue (as I'm on VS2017) but in case anyone else comes to this question when they've made the same (basic) error as me...
It took me a few minutes to realise that if you type in a new Model class (as seen below) then this is not what the UI wants; it requires you to select an existing Model from the dropdown. Once I created the model and then selected it 'Add' was enabled.
回答3:
You should create a controller first, then it will create a View folder automatically. Try to right click that file then click create new view. Also Copy might be a specific name, you may need to change that name.
来源：https://stackoverflow.com/questions/28454808/cannot-add-view-to-asp-net-mvc-5-project