C# 异步转同步 TaskCompletionSource

本文通过taskcompletionsource，实现异步转同步

首先有一个异步方法，如下异步任务延时2秒后，返回一个结果

private static async task<string> testwithresultasync()
{
debug.writeline("1. 异步任务start……");
await task.delay(2000);
debug.writeline("2. 异步任务end……");
return "2秒以后";
}

如何使用taskcompletionsource将此异步方法转成同步呢？

private void taskcompletesourcebutton_onclick(object sender, routedeventargs e)
{
      var result = awaitbytaskcompletesource(testwithresultasync);
      debug.writeline($"4. taskcompletesource_onclick end:{result}");
}

taskcompletionsource使用步骤：

1. 获取var sourcetask =taskcompletionsource.task，
2. 等待此sourcetask结果-sourcetask.result
3. 设置设置sourcetask.result的结果值

private void taskcompletesourcebutton_onclick(object sender, routedeventargs e)
{
      var result = awaitbytaskcompletesource(testwithresultasync);
      debug.writeline($"4. taskcompletesource_onclick end:{result}");
}

标签：异步,onclick,C#,taskcompletionsource,sourcetask,TaskCompletionSource,result,writel
来源： https://www.cnblogs.com/jxxlz/p/15192546.html