我开始使用 Visual Studio 扩展,并希望在我的任务的某些里程碑期间将状态消息写入输出窗口以报告其进度。
我正在使用命令从上下文菜单中触发任务。这是它的 Execute 方法的模拟示例:
private void Execute(object sender, EventArgs e)
{
ThreadHelper.ThrowIfNotOnUIThread();
var paneGuid = Guid.NewGuid();
var outputWindow = (IVsOutputWindow)Package.GetGlobalService(typeof(SVsOutputWindow));
outputWindow.CreatePane(ref paneGuid, "My Window", 1, 1);
outputWindow.GetPane(ref paneGuid, out var outputPane);
outputPane.Activate();
outputPane.OutputString("Starting...\n");
Thread.Sleep(2000);
outputPane.OutputString("1...\n");
Thread.Sleep(2000);
outputPane.OutputString("2...\n");
Thread.Sleep(2000);
outputPane.OutputString("3...\n");
Thread.Sleep(2000);
outputPane.OutputString("Finished");
}
不是在写入时显示输出,而是在 Execute 方法完成后显示输出窗口。
如何让它立即显示并定期写消息?
更新:解决方案
正如下面 JHBonarius 建议的那样,解决方案是将逻辑移动到异步任务中,并根据需要调用 UI 线程以写入输出窗口:
private void Execute(object sender, EventArgs e)
{
ThreadHelper.JoinableTaskFactory.RunAsync(async () =>
{
var paneGuid = Guid.NewGuid();
await ThreadHelper.JoinableTaskFactory.SwitchToMainThreadAsync();
var outputWindow = (IVsOutputWindow)Package.GetGlobalService(typeof(SVsOutputWindow));
outputWindow.CreatePane(ref paneGuid, "My Window", 1, 1);
outputWindow.GetPane(ref paneGuid, out var outputPane);
outputPane.Activate();
outputPane.OutputString("Starting...\n");
await TaskScheduler.Default;
// Call to some async task
await Task.Delay(2000);
await ThreadHelper.JoinableTaskFactory.SwitchToMainThreadAsync();
outputPane.OutputString("1...\n");
await TaskScheduler.Default;
// Call to some async task
await Task.Delay(2000);
await ThreadHelper.JoinableTaskFactory.SwitchToMainThreadAsync();
outputPane.OutputString("2...\n");
await TaskScheduler.Default;
// Call to some async task
await Task.Delay(2000);
await ThreadHelper.JoinableTaskFactory.SwitchToMainThreadAsync();
outputPane.OutputString("3...\n");
await TaskScheduler.Default;
// Call to some async task
await Task.Delay(2000);
await ThreadHelper.JoinableTaskFactory.SwitchToMainThreadAsync();
outputPane.OutputString("Finished");
await TaskScheduler.Default;
});
}
谢谢,杰