Products

Data Converter Cleaner TUC - Unit Converter Import Export Survey Manager Tweet Controller

Developer

Article Blog Forum Interview Beginner News Startup Quiz

Users

Career

Apply Job Internship

Pricing

Login Sign Up Get a Quote

How to handle 'Cross thread exception' in winforms

Anupam Mishra 1496 18 Jan 2016

I have created one listview and display items with the using BackgroundWorker thread , But it will thrown an 'Cross thread exception ' in winforms.

Please give me a solution.

thank you.

Anupam Mishra

Other

1 Answers

Anupam Mishra 19 Jan 2016

As we say i am using a BackgroundWorker thread in a winforms and try to add item in DoWork method. So, for this situation we use code similar like this. it is working:

  private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
    {
        var test = new ListViewItem("item");
        backgroundWorker1.ReportProgress(0, test);
     }
  private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
    {
        listView1.Items.Add((ListViewItem)e.UserState);
    }

or

// avoid exception 'Cross thread exception'  if we using this

ListViewItem _item = new ListViewItem();
     if (listView1.InvokeRequired)
                    listView1.Invoke(new MethodInvoker(delegate
                    {
                       listView1.Items.Add(_item);           
                    }));
                else
          listView1.Items.Add(_item);

MindStick Training

Markdown for AI

A clean, structured version of this page for AI assistants and LLMs.