C＃中的BackgroundWorker不会与code工作，我想要它做的 [英] c# backgroundworker won't work with the code I want it to do

问题描述

我的code引人注目的，当我刚刚得到一个试图运行它带来了没有错误。它说ThreadStateException被用户code我已经在多个地方搜索了这一点，我所有的code相以同样的方式，我有知道的想法是什么问题工作unhanded。这里是code的心不是工作

my code brings up no errors when compelling i just get one while trying to run it. it says ThreadStateException was unhanded by the user code i have searched for this in multiple places and all my code looks to work in the same way i have know idea what the problem is. here is the code that isnt working

 private void button1_Click(object sender, EventArgs e)
 {
      backgroundWorker1.RunWorkerAsync();
 }

 private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
 {
      FolderBrowserDialog dlg2 = new FolderBrowserDialog();
      if (dlg2.ShowDialog() == DialogResult.OK)
      //do whatever with dlg.SelectedPath
      {
           DirectoryInfo source = new DirectoryInfo(dlg.SelectedPath);
           DirectoryInfo target = new DirectoryInfo(dlg2.SelectedPath);

           DirectoryInfo dir = new DirectoryInfo(dlg.SelectedPath);
           FileInfo[] fis = dir.GetFiles("*", SearchOption.AllDirectories);
           foreach (FileInfo fi in fis)
           {
                if (fi.LastWriteTime.Date == DateTime.Today.Date)
                {
                    File.Copy(fi.FullName, target.FullName +"\\"+ fi.Name, true);
                }
           }

      }
 }

任何帮助将AP preciated

any help will be appreciated

推荐答案

您不能从withing线程显示表（对话）。

You cannot show a Form (Dialog) from withing the Thread.

 private void button1_Click(object sender, EventArgs e)
 {
     using (FolderBrowserDialog dlg2 = new FolderBrowserDialog())
     {
       if (dlg2.ShowDialog() == DialogResult.OK)           
       {
          backgroundWorker1.RunWorkerAsync(dlg2SelectedPath);
       }
    }
 }


private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
    string selectedpath = (string) e.Args;
    ....
}

此外，请确保您处理完成的事件，并检查如果（e.Error！= NULL）... 结果
否则，你会忽略的错误。

Also, make sure you handle the Completed event and check if (e.Error != null) ...
Otherwise you will be ignoring errors.

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