Multithreading -backgroundworker issue

Question

0.00/5 (No votes)

See more:

We are using the following code.

In base function (onfinishes), if I change JobSummaryobj.filename, sometimes the updated value of filename is not getting passed to launchRequest. Can someone please suggest what to do?

internal virtual onfinishes(object sender, EventArgs<batchjobresult> args)
{
    JobSummary.OutputLocation = JobSummary.BaseOutputFilePath;
     RunInBackground(JobSummary);
}

private void RunInBackground(JobSummary JobSummaryobj)
{
    var backGroundWorker = new BackgroundWorker();
    backGroundWorker.DoWork += (sender, aventArgs)=>runController.launchRequest(aventArgs.Argument as JobSummary);
    backGroundWorker.RunWorkerAsync(JobSummaryobj);
}

public void launchRequest(JobSummary JobSummaryobj)
{
    // sometimes i don't get updated value here .
}

What I have tried:

I tried passing the object by ref

Posted 8-Aug-19 19:42pm

sapanagarud

Updated 9-Aug-19 0:30am

Afzaal Ahmad Zeeshan

v2

Add a Solution

1 solution

Add a Solution

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

OriginalGriff · Answer 1 · 2019-08-08T22:06:00

I don't have your classes, but a quick test with "abstracted code" from yours:

C#

private void DoIt()
    {
    var backGroundWorker = new BackgroundWorker();
    backGroundWorker.DoWork += (sender, aventArgs) => launchRequest(aventArgs.Argument as MyClass);
    backGroundWorker.RunWorkerAsync(new MyClass(1234));
    }

private void launchRequest(MyClass JobSummaryobj)
    {
    Console.WriteLine(JobSummaryobj.I);
    }
private class MyClass
    {
    public int I { get; set; }
    public MyClass(int i) { I = i; }
    }

Give me consistent results, as I'd expect.

I'd suggest that the problem is with your JobSummaryobj rather than the code you show, and I'd try looking closely at it and what happens to it before, during and after the setup for the BackgroundWorker. It may be that the main thread is changing the value to soon or too late and that shows up as an inconsistency in your secondary thread intermittently.

But without your whole system there is nothing we can do to help!

Multithreading -backgroundworker issue

1 solution

Solution 1

Add your solution here

Preview 0

Multithreading -backgroundworker issue

1 solution

Solution 1

Add your solution here

Preview 0

Existing Members

...or Join us