Programming Forums > Application Development > C#

BlazingWolf · Apr 17th, 2006, 12:29 PM

So...I decided I need to use threads in a program I'm making because they operation I'm trying to do could take 30+ minutes to complete, and the GUI is useless during that time unless I multithread it.

The problem I'm having is updating the UI from the worker thread. I know your supposed to use a delegate to pass the function. But I'm confused as to where the function and delegate are supposed to be place, and how you pass the varible to the function.

My current understand is this...

Thread #1 ( The UI thread )
--code for the function your going to use

Thread #2 ( Worker )
--declare delegate
--control.Invoke( pass delegate with vars)

I am I understanding the placement right? I guess this is really just a matter of understanding delegates which I have never used before.

BlazingWolf · Apr 18th, 2006, 9:15 PM

Meh, Nothing?!

Pedja · Apr 19th, 2006, 5:19 PM

(Toggle Plain Text)

public delegate void VoidStringDelegate(string text);

textBox.Invoke(new VoidStringDelegate(SomeMethod),
new object[]{”Some string”});

//method must have the same signature as delegate
//parameters are passed as array of objects

I guess this is it.

Apr 19th, 2006, 5:19 PM	#3
Pedja Programmer Join Date: Nov 2005 Location: Belgrade, Serbia & Montenegro Posts: 31 Rep Power: 0	(Toggle Plain Text) public delegate void VoidStringDelegate(string text); textBox.Invoke(new VoidStringDelegate(SomeMethod), new object[]{”Some string”}); //method must have the same signature as delegate //parameters are passed as array of objects public delegate void VoidStringDelegate(string text); textBox.Invoke(new VoidStringDelegate(SomeMethod), new object[]{”Some string”}); //method must have the same signature as delegate //parameters are passed as array of objects I guess this is it.

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Apr 17th, 2006, 12:29 PM	#1
BlazingWolf Hobbyist Programmer Join Date: Sep 2004 Posts: 207 Rep Power: 5	Accessing another thread So...I decided I need to use threads in a program I'm making because they operation I'm trying to do could take 30+ minutes to complete, and the GUI is useless during that time unless I multithread it. The problem I'm having is updating the UI from the worker thread. I know your supposed to use a delegate to pass the function. But I'm confused as to where the function and delegate are supposed to be place, and how you pass the varible to the function. My current understand is this... Thread #1 ( The UI thread ) --code for the function your going to use Thread #2 ( Worker ) --declare delegate --control.Invoke( pass delegate with vars) I am I understanding the placement right? I guess this is really just a matter of understanding delegates which I have never used before. __________________ _______________________________ BlazingWolf

Apr 18th, 2006, 9:15 PM	#2
BlazingWolf Hobbyist Programmer Join Date: Sep 2004 Posts: 207 Rep Power: 5	Meh, Nothing?! __________________ _______________________________ BlazingWolf

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Programming Forums > Application Development > C#

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