C#线程间控件操作--解决错误：线程间操作无效，从不是创建控件的线程访问它

C#中创建线程的几种方法

1. Task

private void button1_Click(object sender, EventArgs e)
{
	//方式1
	Task.Factory.StartNew(()=>Test());
	//方式2
	Task task2 = new Task(()=>{
		Test();
	});
	task2.Start();
	//方式3
	Task.Run(()=>{
		Test();
	});
	
}

private void Test()
{
	// do something
}
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2. new Thread()

private void button1_Click(object sender, EventArgs e)
{
	//方式1：
	Thread TestThread = new Thread(Test);
    TestThread.IsBackground = true;
    TestThread.Start();
    //方式2：
    Thread thread2 = new Thread(new ThreadStart(Test))
    {
        IsBackground = true
    };
    thread2.Start();
 }
 private void Test()
{
	// do something
}
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异步委托线程中控件访问

private void button1_Click(object sender, EventArgs e)
{
	Task.Run(()=>{
		Test1(); //方式1
		ShowTime();//方式2
		SetLabelText(lable3, "hello");//方式3
	});
	
}
//方式1
private void Test1()
{
	// 方法1
	this.BeginInvoke((MethodInvoker)delegate
	{
		label1.Text = "hello";
	});
	//方法2
	this.Invoke(new EventHandler(delegate
	{
		label1.Text = "Hello";
	}));
}
//方式2
private void ShowTime()
{
	if(label2.InvokerRequired)//判断当前线程是否和控件所属线程为同一线程
	{
		label2.Invoke(new Action(ShowTime)); //不为同一线程，则使用委托执行该方法本身
	}
	else
	{
		label2.Text = DateTime.Now.ToLongTimeString();  //为同一线程则直接刷新label1
	}
}
//方式3
delegate void setLabelTextCallback(Label label, string text);
public void SetLabelText(Label label, string text)
{
	if(label.InvokeRequired)
	{
		while(!label.IsHandleCreated)
		{
			if (label.Disposing || label.IsDisposed)
 				return;
		}
		setLabelTextCallback callback = new setLabelTextCallback(SetLabelText);
		label.Invoke(callback, new object[] { label, text });
	}
	else
	{
		label.Text = text;
	}
}
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