visual-studio - 作为重构的一部分，将新项目添加到解决方案中

Question

有没有办法从 CodeAction 向解决方案添加新项目类(class)？

语境:

我有我的 CodeRefactoringProvider生成一些代码，我想将该代码放在一个新项目中。

我有 CodeRefactoringProvider和 CodeAction为此目的实现并尝试从我从 CodeRefactoringContext 获得的解决方案实例中添加项目喜欢

 context.RegisterRefactoring(
            CodeAction.Create("Create New Project",
            (c)=>                
                Task.Run( 
                    ()=>
                    {
                        var proj = context.Document.Project.Solution.AddProject("NewProject", "NewProject", "C#");
                        return proj.Solution;
                    })           
            ));

这给了我

    System.AggregateException : One or more errors occurred. ---> Adding projects is not supported.
   at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions)
   at System.Threading.Tasks.Task.Wait(Int32 millisecondsTimeout,CancellationToken cancellationToken)
   at Microsoft.CodeAnalysis.Editor.Implementation.Suggestions.SuggestedAction.InvokeWorker(Func`1 getFromDocument,IProgressTracker progressTracker,CancellationToken cancellationToken)
   at Microsoft.CodeAnalysis.Editor.Implementation.Suggestions.SuggestedAction.<>c__DisplayClass18_0.<InvokeCore>b__0()
   at Microsoft.CodeAnalysis.Extensions.IExtensionManagerExtensions.PerformAction(IExtensionManager extensionManager,Object extension,Action action)
---> (Inner Exception #0) System.NotSupportedException : Adding projects is not supported.
   at Microsoft.CodeAnalysis.Workspace.CheckAllowedSolutionChanges(SolutionChanges solutionChanges)
   at Microsoft.CodeAnalysis.Workspace.TryApplyChanges(Solution newSolution,IProgressTracker progressTracker)
   at Microsoft.VisualStudio.LanguageServices.Implementation.ProjectSystem.VisualStudioWorkspaceImpl.TryApplyChanges(Solution newSolution,IProgressTracker progressTracker)
   at Microsoft.CodeAnalysis.CodeActions.ApplyChangesOperation.TryApply(Workspace workspace,IProgressTracker progressTracker,CancellationToken cancellationToken)
   at Microsoft.CodeAnalysis.Editor.Implementation.CodeActions.CodeActionEditHandlerService.ProcessOperations(Workspace workspace,ImmutableArray`1 operations,IProgressTracker progressTracker,CancellationToken cancellationToken)
   at async Microsoft.CodeAnalysis.Editor.Implementation.CodeActions.CodeActionEditHandlerService.ApplyAsync(<Unknown Parameters>)<---

我尝试使用 IVsSolution 添加项目服务但出现错误:

 The operation could not be completed. A null reference pointer was passed to the stub. 

那么，如何在解决方案中创建一个新项目？

Answer 1

实际上，您需要操作 VS UI，而不是解决方案文件或其表示形式 ( context.Document )。否则，我希望您需要手动操作所有众所周知的“先保存更改”功能。什么复杂。

因此你应该调用 VS UI 方法(意味着 COM):Solution2.AddFromFile(String, Boolean)
https://docs.microsoft.com/en-us/dotnet/api/envdte80.solution2.addfromfile?view=visualstudiosdk-2017#EnvDTE80_Solution2_AddFromFile_System_String_System_Boolean_

此调用将用作宏，并且似乎符合您的预期。