public void TestCallback(IJavascriptCallback javascriptCallback)
{
const int taskDelay = 1500;
Task.Run(async () => //异步标记(async )的lambda表达式,相当于异步函数(() =>lambda表达式相当于函数)
{
await Task.Delay(taskDelay);//await:所在函数必须为异步
await javascriptCallback.ExecuteAsync("This callback from C# was delayed " + taskDelay + "ms");
});
}
var task = e.Frame.GetSourceAsync();//传统3中方法,等待异步结果,while循环完成标记;callback,事件
task.ContinueWith(t => //ContinueWith的功能:订阅一个方法,该方法用于task异步任务完成之后,要继续做的事。。。
{
if (!t.IsFaulted)
{
string resultStr = t.Result;
#if DEBUG
Debug.WriteLine(resultStr);
#endif
}
});