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

I have encounter same problem as above commenter "Power-Mosfet"

and in the end, added a new BackgroundWorker() then assigned to the global bw value will fix my problem.

code is, change from:

private BackgroundWorker gBgwDownload;

private void yourFunction_bw(xxx)
{
    // Create a background thread
    gBgwDownload.DoWork += bgwDownload_DoWork;
    gBgwDownload.RunWorkerCompleted += bgwDownload_RunWorkerCompleted;
    //omited some code
    gBgwDownload.RunWorkerAsync(paraObj);
}

to:

private BackgroundWorker gBgwDownload;

private void yourFunction_bw(xxx)
{
    // Create a background thread
    gBgwDownload = new BackgroundWorker(); /* added this line will fix problem */
    gBgwDownload.DoWork += bgwDownload_DoWork;
    gBgwDownload.RunWorkerCompleted += bgwDownload_RunWorkerCompleted;
    //omited some code
    gBgwDownload.RunWorkerAsync(paraObj);

}