triggering another control's method

This is a discussion on triggering another control's method within the C# Programming forums, part of the General Programming Boards category; How do I trigger another control's method in C#? I want to have a background thread running a timer and ...

  1. #1
    WDT
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    triggering another control's method

    How do I trigger another control's method in C#?

    I want to have a background thread running a timer and if the timer function finishes in the thread I'd like it to trigger the stop button which can be used also terminate the thread prematurely.
    A hundred Elephants can knock down the walls of a fortress... One diseased rat can kill everyone inside

  2. #2
    Confused Magos's Avatar
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    Something like this, or did I miss something?
    Code:
    protected void Timer1_Timeout(object s, Args e)
    {
      StopBackgroundThread();
    }
    
    protected void Button1_Click(object s, Args e)
    {
      StopBackgroundThread();
    }
    
    private void StopBackgroundThread()
    {
       Button1.Enabled = false;
       Timer1.Stop();
    
       //etc...
    }
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  3. #3
    WDT
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    Missed completely.
    Something like:
    Code:
    protected void Timer1_Timeout(object s, Args e)
    {
      If (for some reason this timer's Stop is triggered by code)
      trigger Button1_Click event/method
    }
    
    protected void Button1_Click(object s, Args e)
    {
      StopBackgroundThread();
    }
    
    private void StopBackgroundThread()
    {
       Button1.Enabled = false;
       Timer1.Stop();
    
       //etc...
    }
    A hundred Elephants can knock down the walls of a fortress... One diseased rat can kill everyone inside

  4. #4
    Registered User
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    If you wish to change the Button1.Enabled property from a background thread you'll need to invoke it first otherwise it will throw an illegal cross thread exception.

    An easy way is to have a seperate method for setting the Button1.Enabled property. Example:

    Code:
    private delegate void SetButtonEnableStatusDelegate(bool enabled);
    
    private void SetButtonEnableStatus(bool enabled)
    {
        if (Button1.InvokeRequired)
            Button1.BeginInvoke(new SetButtonEnableStatusDelegate(SetButtonEnableStatus), enabled);
        else
            Button1.Enabled = enabled;
    }
    You can use the SetButtonEnableStatus method to set the Button1.Enabled property from within the button's owner thread, or a background thread.

    Code:
    SetButtonEnableStatus(true); // button enabled
    
    SetButtonEnableStatus(false); // button disabled

  5. #5
    WDT
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    Thanks Theoobe (for answering my next question before I posed it) .
    For the rest of you others out there I was looking for something like:
    Code:
    protected void Timer1_Timeout(object s, Args e)
    {
      If (for some reason this timer's Stop is triggered by code)
      Button1_Click(null, null); //<====trigger Button1_Click event/method
    }
    
    protected void Button1_Click(object s, Args e)
    {
      StopBackgroundThread();
    }
    
    private void StopBackgroundThread()
    {
       Button1.Enabled = false;
       Timer1.Stop();
    
       //etc...
    }
    A hundred Elephants can knock down the walls of a fortress... One diseased rat can kill everyone inside

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