C# 通过线程更新UI

摘自：http://msdn.microsoft.com/zh-cn/library/ms171728(en-us,VS.80).aspx

关键代码（form中增加）：

delegate void SetTextCallback(string text);

private Thread demoThread = null;

private void setTextSafeBtn_Click(
			object sender,
			EventArgs e)
		{
			this.demoThread =
				new Thread(new ThreadStart(this.ThreadProcSafe));

			this.demoThread.Start();
		}

private void ThreadProcSafe()
		{
			this.SetText("This text was set safely.");
		}

private void SetText(string text)
		{
			// InvokeRequired required compares the thread ID of the
			// calling thread to the thread ID of the creating thread.
			// If these threads are different, it returns true.
			if (this.textBox1.InvokeRequired)
			{
				SetTextCallback d = new SetTextCallback(SetText);
				this.Invoke(d, new object[] { text });
			}
			else
			{
				this.textBox1.Text = text;
			}
		}