DoWork of BackgroundWorker is called twice when RunWorkerAsync is called once?

Question

I have create a backgroundworker in an class it works, but if i call and wait until the end run, call it for the second time it will do the same process twice

i thin

Answer 1

thank you....this code is working fine... creating new intance for backroundworker is good idea.... Now we can call this function in for/while loop and can run multiple backgroundworker process.

I coded like this when button click is done.. without distrubting the main thread flow... multiple process will be running back side.... i just used messagebox to pop up..but we can do timetaking process to run in "bgwDownload_DoWork" function... and multiple process will be created... and her we need not check the BackgroundWorker is busy or not...

private void button1_Click(object sender, EventArgs e)
{
   for (int i = 0; i < 3; i++)
     yourFunction_bw(i);

 }
private BackgroundWorker gBgwDownload;

private void yourFunction_bw(int i)
{
    // Create a background thread
    gBgwDownload = new BackgroundWorker(); // added this line will fix problem 
    gBgwDownload.DoWork += bgwDownload_DoWork;
    gBgwDownload.RunWorkerAsync(i);

}

private void bgwDownload_DoWork(object sender, DoWorkEventArgs e)
{
  int stre = (int)e.Argument;
  MessageBox.Show(stre.ToString ()); // time taken process can be added here
}