我熟悉任务的基本知识,asyn / await等,但我没有做太多预先的事情,我有点卡在一个问题上。我有一种与相机系统进行通信的方法。摄像机代码使用Task
在其自己的线程上运行。
public Task<bool> DoCameraWork()
{
bool Result = true;
return Task.Run<bool>(() =>
{
for (int i = 0; i < 10; i++)
{
// Do something which will set Result to True or False
if (Result)
break;
else
Task.Delay(1000);
}
return Result;
});
}
我希望能够做的是启动任务(DoCameraWork),更新UI,调用另一种方法,然后等待任务完成后再继续。
最好的办法是什么?这是一个模拟方法,我希望能解释一下。是的代码很差,但它只是为了解释我想要实现的目标。
// Running on UI Thread
public async void SomeMethod()
{
DoCameraWork(); // If I do await DoCameraWork() then rest of code won't process untill this has completed
TextBox.Text = "Waiting For camera work";
SendData(); // Calls a method to send data to device on RS232, notthing special in this method
// Now I want to wait for the DoCameraWork Task to finish
// Once camera work done, check result, update UI and continue with other stuff
// if result is true
// TextBox.Text = "Camera work finished OK";
// else if result is false
// TextBox.Text = "Camera work finished OK";
// Camera work finished, now do some more stuff
}
答案 0 :(得分:5)
听起来你只想稍后在方法中等待:
public async void SomeMethod()
{
var cameraTask = DoCameraWork();
TextBox.Text = "Waiting For camera work";
SendData();
var result = await cameraTask;
TextBox.Text = result ? "Camera work finished OK"
: "Eek, something is broken";
...
}