线程间操作无效: 从不是创建控件“textBox1”的线程访问它。

问题产生和现象：

垮线程调用控件属性，现象如下：

解决方法：

方法1

Control.CheckForIllegalCrossThreadCalls = false;

方法2

private void button1_Click(object sender, EventArgs e)
{
    Thread.CurrentThread.Name = "Form Thread";
    Thread td = new Thread(new ThreadStart(SetControlText));
    td.Name = "Customer Thread";
    td.Start();
} 
private void SetControlText()
{
    if (this.InvokeRequired)
    {
        this.Invoke(new Action(SetControlText));
    }
    else 
    {
        this.textBox1.Text = DateTime.Now.ToString();
    } 
}

通用起见，可以考虑这样做：

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
    }
    private void button1_Click(object sender, EventArgs e)
    {
        Thread.CurrentThread.Name = "Form Thread";
        Thread td = new Thread(new ThreadStart(SetControlText));
        td.Name = "Customer Thread";
        td.Start();
    }
    private void SetControlText()
    {
        this.InvokeIfNeeded(delegate(string str) { this.textBox1.Text = str; }, DateTime.Now.ToString("yyMMdd"));
        // or
        //this.InvokeIfNeeded((str)=> this.textBox1.Text = str,DateTime.Now.ToString("yyMMdd"));
    }
}
public static class ControlExtensions
{
    public static void InvokeIfNeeded<T>(this Control ctl, Action<T> act, T args)
    {
        if (ctl.InvokeRequired)
        {
            ctl.Invoke(act, args);
        }
        else
        {
            act(args);
        }
    }
}

备注：

Control.InvokeRequired Property

Usage

Gets a value indicating whether the caller must call an invoke method when making method calls to the control because the caller is on a different thread than the one the control was created on.

Property Value

true if the control's Handle was created on a different thread than the calling thread (indicating that you must make calls to the control through an invoke method); otherwise, false.