How to determine whether or not EnvDTE.Project object represents a C/C++ project?

Question

I have a Project instance, and I don't understand how to find out the project type/language. Specifically, I need to check for a C/C++ project.

The docs seem lacking.

Previously, another person added the following bit of magic to my open-source VS extension, and it worked in VS2013-2015:

private static bool isVisualCppProject(object project)
{
    Type projectObjectType = project.GetType();
    var projectInterface = projectObjectType.GetInterface("Microsoft.VisualStudio.VCProjectEngine.VCProject");
    return projectInterface != null;
}

   ...

isVisualCppProject(project.Object);

But it no longer works in VS 2017 RC. And I would gladly get rid of this runtime reflection magic and un-typed object and dynamic instead of Project - the code is already getting unmaintainable because of this.

Answer 1

you can determine project type via project extension name, and the following demo for your reference.

    DTE2 dte = (DTE2)this.ServiceProvider.GetService(typeof(DTE));
            Solution2 solution = (Solution2)dte.Solution;

            foreach (Project p in solution.Projects)
            {

                string[] projectName = p.FullName.Split('.');

                if (projectName.Length > 1)
                {
                   string fileExt = projectName[projectName.Length-1];

                    if (fileExt == "vcxproj")
                    {
                        //is c/c++ porject
                    }
                }
}

Answer 2

The EnvDTE.Project.Kind is the first place to look, as mentioned in the comments above. See HOWTO: Guess the type of a Visual Studio project from an add-in or macro

There is a list of some well-known GUIDs, see INFO: List of known project type Guids.

You are probably interested in {8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}. But a project may have various sub-types, in which case multiple GUIDs are applied to it. For example MVC + C#. See HOWTO: Get the project flavor (subtype) of a Visual Studio project from an add-in

The EnvDTE.Project.Kind contains the main project type and it is not guaranteed that e.g. the C++ GUID will be stored in this property. The safest way is to retrieve all GUIDs applied to a project. Use the GetProjectTypeGuids method from the last link. You'll get the list of all GUID and then you'll just test if it contains {8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}.