asynchronous - 如何在 VS2019 的异步扩展中获取 ShellSettingsManager？

Question

我想创建一个小扩展来向 VS2019 添加外部工具列表。快速搜索在 https://learn.microsoft.com/en-us/visualstudio/extensibility/writing-to-the-user-settings-store?view=vs-2019 找到了看似完美的示例代码。 .这添加了一个调用记事本的命令，所以我认为通过一些编辑，我的工作就完成了。

但是，这个例子是作为同步扩展编写的，已被弃用，所以我尝试将用于 MenuItemCallBack 的代码放入扩展的 Execute 方法中，但是行

SettingsManager settingsManager = new ShellSettingsManager(ServiceProvider);

编译失败，因为 ServiceProvider 现在是 IAsyncServiceProvider 类型，而 ShellSettingsManager 构造函数需要 IServiceProvider 类型的参数。

据我所知，ShellSettingsManager 仍然是访问设置存储的方式，但我能找到的所有示例都涉及将代码放入 MenuItemCallback(以及已有数年历史)，因此适用于同步扩展。

那么，有人能告诉我在异步扩展中访问设置存储的推荐方法吗？

Answer 1

ShellSettingsManager 构造函数采用 IServiceProvider 接口(interface)或 IVsSettings 接口(interface)。鉴于您的 AsyncPackage 派生对象实现了 IServiceProvider，您应该能够将它作为参数传递给构造函数。以下快速演示包对我有用:

using System;
using System.ComponentModel.Design;
using System.Runtime.InteropServices;
using System.Threading;
using Microsoft;
using Microsoft.VisualStudio.Settings;
using Microsoft.VisualStudio.Shell;
using Microsoft.VisualStudio.Shell.Interop;
using Microsoft.VisualStudio.Shell.Settings;
using Task = System.Threading.Tasks.Task;

namespace UserSettingsDemo
{
    [PackageRegistration(UseManagedResourcesOnly = true, AllowsBackgroundLoading = true)]
    [Guid(UserSettingsDemoPackage.PackageGuidString)]
    [ProvideMenuResource("Menus.ctmenu", 1)]
    public sealed class UserSettingsDemoPackage : AsyncPackage
    {
        public const string PackageGuidString = "cff6cdea-21d1-4736-b5ea-6736624e718f";
        public static readonly Guid CommandSet = new Guid("dde1417d-ae0d-46c4-8c84-31883dc1a835");
        public const int ListExternalToolsCommand = 0x0100;

        protected override async Task InitializeAsync(CancellationToken cancellationToken, IProgress<ServiceProgressData> progress)
        {
            await this.JoinableTaskFactory.SwitchToMainThreadAsync(cancellationToken);

            OleMenuCommandService commandService = await GetServiceAsync(typeof(IMenuCommandService)) as OleMenuCommandService;
            Assumes.Present(commandService);
            var menuItem = new MenuCommand(OnListExternalTools, new CommandID(CommandSet, ListExternalToolsCommand));
            commandService.AddCommand(menuItem);
        }

        private void OnListExternalTools(object sender, EventArgs e)
        {
            ShellSettingsManager settingsManager = new ShellSettingsManager(this);
            WritableSettingsStore userSettingsStore = settingsManager.GetWritableSettingsStore(SettingsScope.UserSettings);

            int toolCount = userSettingsStore.GetInt32("External Tools", "ToolNumKeys");
            for (int i = 0; i < toolCount; i++)
            {
                string tool = userSettingsStore.GetString("External Tools", "ToolCmd" + i);
                VsShellUtilities.ShowMessageBox(this, tool, "External Tools", OLEMSGICON.OLEMSGICON_INFO,
                    OLEMSGBUTTON.OLEMSGBUTTON_OK, OLEMSGDEFBUTTON.OLEMSGDEFBUTTON_FIRST);
            }
        }
    }
}

真诚的