c++ - 向 visual studio 模板添加过滤器

Question

我正在尝试使用向导在 visual studio (C++) 项目模板中创建一个过滤器(其中一个小文件夹，除了在项目中分离文件外什么都不做)，所以我在RunStarted 方法:

public void RunStarted(object automationObject,
        Dictionary<string, string> replacementsDictionary,
        WizardRunKind runKind, object[] customParams)
    {
      try
      {
        // Add filters to the project
        EnvDTE.DTE dte = (EnvDTE.DTE)automationObject;

        Array activeProjects = (Array)dte.ActiveSolutionProjects;
        Project activeProj = (Project)activeProjects.GetValue(0);
        VCProject prj = (VCProject)activeProj.ProjectItems.Item(0);
        VCFilter filter = prj.AddFilter("Header_Files");
        filter.AddFile("header.h");
        prj.Save();
      }
      catch (Exception ex)
      {
        MessageBox.Show(ex.ToString());
      }
    }

虽然这是失败的。返回的错误是:

System.IndexOutOfRangeException: Index was outside the bounds of the array.

at System.Array.InternalGetReference(Void* elemRef, Int32 rank, Int32* pIndices)

at System.Array.GetValue(Int32 index)

at my_wizard.IMyWizard.RunStarted(Object automationObject, Dictionary`2 replacementsDictionary, WizardRunKind runKind, Object[] customParams)

我哪里错了？如何向 vs 模板添加过滤器？

Answer 1

你可以找到答案here .
有人说当 Solution Explorer 未打开时会出现此问题。
这是我基于上层链接的解决方案:

    private Project getActiveProject(DTE2 dte)
    {
        Array projects = dte.ActiveSolutionProjects as Array;
        if (projects == null || projects.Length == 0)
        {
            projects = dte.Solution.SolutionBuild.StartupProjects as Array;
            if (projects == null || projects.Length == 0)
            {
                Projects pro = dte.Solution.Projects;
                if (pro == null || pro.Count == 0)
                    return null;
                return pro.Item(0);
            }
        }
        return projects.GetValue(0) as Project;
    }