How to check a forms background work from another form

Question

I have 2 winforms, one (call it Form1) contains a background worker, and that form opens a second form (Form2). Form1 starts a background worker, and while its working opens Form2 so the user can do something else. When the user is done on Form2 and clicks submit, I want to check if Form1's background worker is done and if it isn't pop a message asking the user to wait a minute, else allow the Form2 submit.

How can I check the status of Form1's background worker from Form2? I looked at this post Check to see if a thread in another form is still running , but my situation is different and I'm not sure how to adapt.

Igby Largeman · Accepted Answer · 2011-09-15T20:31:07.283

0

Check the BackgroundWorker.IsBusy property.

Edit

There are various options for making this information available to the second form.

You could pass the BackgroundWorker to Form2 on creation. Form2 can then check the IsBusy property.
You could create a public property IsRunningBackgroundWork on Form1, and give Form2 a reference to Form1. The getter for this property would check BackgroundWorker.IsBusy.
You could create a public property CanSubmit on Form2, and set it from Form1 when the BackgroundWorker completes.

bgw.RunWorkerCompleted += (s, e) => form2.CanSubmit = true;

Alternatively (and I think this is best) you could put the submission code in Form1, and just use Form2 as a dialog. Then Form2 doesn't need to know anything about Form1. Form1 opens Form2 modally, and when Form2 closes, Form1 checks if the worker is finished, and acts accordingly.

edited Sep 15 '11 at 20:31

answered Sep 15 '11 at 20:20

Igby Largeman

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-Yes, but I can't "see" the background worker from the other form. – MAW74656 Sep 15 '11 at 20:20
@MAW: added some suggestions to my answer. – Igby Largeman Sep 15 '11 at 20:31
-Used CanSubmit variable on Form2 set from background worker's completed method. Used for simplicity and ease. – MAW74656 Sep 15 '11 at 20:42

score 0 · Answer 2 · answered Sep 15 '11 at 20:24

0

The situation is almost similiar to that one provided in your question. You can do something like this:

public class Form1 
{
   public bool IsBackgroundWorkerStillRunning {get {....};}
}


public class Form2 
{
    Form1 form1 = null;
    public Form2(Form1 frm1)
    {
      form1 = frm1;
    }

     private void OnSubmit(...)
     {
         if(form1.IsBackgroundWorkerStillRunning )
              //wait 
         else
              //proceed
     }
}

one the Form1 have a property which checks for background worker state

answered Sep 15 '11 at 20:24

Tigran

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8
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-Did not work because I don't have visibility on Form1 from Form2. – MAW74656 Sep 16 '11 at 13:55
@MAW74656: in Form2 you have form1 which is actually intialized to Form1 caller object. – Tigran Sep 16 '11 at 14:15

How to check a forms background work from another form

2 Answers2