Timer callback

Hi,

I have a form and have created a timer. I want my timer to watch a print queue (look for changes every 5 seconds or whatever) and then update a listview on the main form. The problem is I can't think of a way to make the timer inform the form that something has happened - or another way I have tried to tackle it is to pass the object reference of the listview into the timer routine...... anybody got any examples/ideas?

Regards,
DJ

Okay. I have a question. Where is the timer created and where is the form created? I am assuming they are on diffirent forms or something.

There are several answers.
1) Create a public wrapper for the listbox.Items.Add() in the form that contains it(optional but creates less typing) and pass a refreance of the form to where ever. I usualy do that with a constructor.

2) impliment the VB6 Forms Collection I posted in this forum. it will solve that problem quickly with only two changes to you code. Add an Ex to you Form

Code:

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public class myForm : System.Windows.Forms.FormEx

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inheritance statement and construct your form using a key

Code:

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myForm frm = new myForm("myForm1");

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.

and finally

Code:

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System.Windows.Forms.FormEx.Forms["myForm1"].ListAdd(QueeItem);

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3)put the timer on the form with the listbox and do this.listboxname.Items.Add(QueeItem);

4)I dunno somebody provide 4

Quote:

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Originally posted by DJ_Catboy
Hi,

I have a form and have created a timer. I want my timer to watch a print queue (look for changes every 5 seconds or whatever) and then update a listview on the main form. The problem is I can't think of a way to make the timer inform the form that something has happened - or another way I have tried to tackle it is to pass the object reference of the listview into the timer routine...... anybody got any examples/ideas?

Regards,
DJ

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You might want to take a look at this http://msdn.microsoft.com/msdnmag/is...T/default.aspx