backgroundWorker1_ProgressChanged问题 [英] backgroundWorker1_ProgressChanged Problem

问题描述

大家好.

我有一些可与后台工作人员一起工作的代码.
现在，我有了一些方法，当它们在doWork()中执行时，我想向用户显示一些状态，以便在用户等待操作完成时得到通知.

我有以下代码:

Hi guys..

I have some code that works with background worker.
Now, I have some methods which while they are executing in doWork() I want to show some status for the user in order to be notified what''s happening while he waits the action to be completed.

I have this code:

private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
  if (methodMode == 1)
  {
    txt_Note.SetStatusAndText("Preparing summary ");
  }
  else if (methodMode == 2)
  {
    txt_Note.SetStatusAndText("Saving Transaction...");
  }
  if (backMode == 3)
  {
    txt_Note.SetStatusAndText("Sending to MIDAS...");
  }
}

但是，当我执行它时，它引发了我无法从不同于当前线程的其他线程访问txt_Note的异常.

知道为什么会这样吗?

谢谢！

But when I execute it, it throws me exception that can not access txt_Note from different thread then the current one.

Any idea why is happening this?

Thanks!

推荐答案

您需要使用Invoke才能正确执行此操作.在下面的链接中，请看一下SetText方法.这将帮助您.

http://msdn.microsoft.com/en-us/library/ms171728% 28VS.80％29.aspx [ ^ ]

祝你好运！

You need to use Invoke to do this correctly. At the link below, have a good look at the SetText method. This will help you out.

http://msdn.microsoft.com/en-us/library/ms171728%28VS.80%29.aspx[^]

Good luck!

这篇关于backgroundWorker1_ProgressChanged问题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！