线程间操作无效: 从不是创建控件的线程访问它的三种方法

看下解决办法吧

1、把CheckForIllegalCrossThreadCalls设置为false

2、利用委托

 

delegate void SetTextCallBack(string text);
private void SetText(string text)
{
if (this.txt_a.InvokeRequired)
{
SetTextCallBack stcb = new SetTextCallBack(SetText);
this.Invoke(stcb , new object[] { text});
}
else
{
this.txt_a.Text = text;
}
}

private void LoadData()
{
SetText("测试");
}

//窗体加载时，用线程加载数据
private void Frm_ImportManager_Load(object sender, EventArgs e)
{
ThreadStart ts = new ThreadStart(LoadData);
Thread thread = new Thread(ts);
thread.Name = "LoadData";
thread.Start();
}

3、使用 BackgroundWorker控件

在应用程序中实现多线程的首选方式是使用 BackgroundWorker 组件。BackgroundWorker 组件使用事件驱动模型实现多线程。辅助线程运行 DoWork 事件处理程序，创建控件的线程运行 ProgressChanged 和 RunWorkerCompleted 事件处理程序。注意不要从 DoWork 事件处理程序调用您的任何控件。

下面的代码示例不异步执行任何工作，因此没有 DoWork 事件处理程序的实现。TextBox 控件的 Text 属性在 RunWorkerCompleted 事件处理程序中直接设置。

// This event handler starts the form's
// BackgroundWorker by calling RunWorkerAsync.
//
// The Text property of the TextBox control is set
// when the BackgroundWorker raises the RunWorkerCompleted
// event.
private void setTextBackgroundWorkerBtn_Click(
object sender,
EventArgs e)
{
this.backgroundWorker1.RunWorkerAsync();
}

// This event handler sets the Text property of the TextBox
// control. It is called on the thread that created the
// TextBox control, so the call is thread-safe.
//
// BackgroundWorker is the preferred way to perform asynchronous
// operations.

private void backgroundWorker1_RunWorkerCompleted(
object sender,
RunWorkerCompletedEventArgs e)
{
this.textBox1.Text =
"This text was set safely by BackgroundWorker.";
}