Hi,
How can I dispatch something from a worker thread to the UI thread ?
Thanks in advance
greetings
How can I dispatch something from a worker thread to the UI thread ?
Thanks in advance
greetings
-
-
Re: dispatch
"Jhon" <Jhon@a.a> wrote in message
news:K9Cfb.5803 5$fQ7.2348178@p hobos.telenet-ops.be...[color=blue]
> Hi,
>
> How can I dispatch something from a worker thread to the UI thread ?
>
> Thanks in advance
> greetings
>
>[/color]
Read about Form.Invoke. The following code should give you the idea:
public class Foo
{
public MyFormClass TheForm; //has a TextBox called textBox; inherits
//from System.Windows. Forms.Form
public delegate void UIMessageHandle r(String msg);
public static UIMessageHandle r OnUIMsgProxy;
public Foo(MyFormClass form)
{
OnUIMsgProxy = new UIMessageHandle r(OnUIMsg);
TheForm = form;
}
public static void OnUIMsg(String msg) //invoked on UI thread
{
//add new msg to the top of the current text
String curText = TheForm.textBox .Text;
if (curText.Length > 28000)
curText = curText.Substri ng(0,25000);
TheForm.textBox .Text = msg + "\r\n" + curText;
TheForm.textBox .Refresh();
}
/*
To insert text to the UI from another thread, the other thread calls:
Foo.UIMsgInvoke ("here is some text for the UI");
/*
public static void UIMsgInvoke(Str ing str)
{
//invoke the message writer on the UI thread
Object [] msg = new Object[1];
msg[0] = str;
if (TheForm.IsHand leCreated)
TheForm.Invoke( OnUIMsgProxy, msg);
}
}
-
Re: dispatch
"Jhon" <Jhon@a.a> wrote in message
news:K9Cfb.5803 5$fQ7.2348178@p hobos.telenet-ops.be...[color=blue]
> Hi,
>
> How can I dispatch something from a worker thread to the UI thread ?
>
> Thanks in advance
> greetings
>
>[/color]
Read about Form.Invoke. The following code should give you the idea:
public class Foo
{
public MyFormClass TheForm; //has a TextBox called textBox; inherits
//from System.Windows. Forms.Form
public delegate void UIMessageHandle r(String msg);
public static UIMessageHandle r OnUIMsgProxy;
public Foo(MyFormClass form)
{
OnUIMsgProxy = new UIMessageHandle r(OnUIMsg);
TheForm = form;
}
public static void OnUIMsg(String msg) //invoked on UI thread
{
//add new msg to the top of the current text
String curText = TheForm.textBox .Text;
if (curText.Length > 28000)
curText = curText.Substri ng(0,25000);
TheForm.textBox .Text = msg + "\r\n" + curText;
TheForm.textBox .Refresh();
}
/*
To insert text to the UI from another thread, the other thread calls:
Foo.UIMsgInvoke ("here is some text for the UI");
/*
public static void UIMsgInvoke(Str ing str)
{
//invoke the message writer on the UI thread
Object [] msg = new Object[1];
msg[0] = str;
if (TheForm.IsHand leCreated)
TheForm.Invoke( OnUIMsgProxy, msg);
}
}
Comment
-
Re: dispatch
that will do it,
Thanks,
Greetings
"Fred Mellender" <nospamPlease_f redm@frontierne t.net> wrote in message
news:i3Dfb.97$c s.13@news01.roc .ny...[color=blue]
>
> "Jhon" <Jhon@a.a> wrote in message
> news:K9Cfb.5803 5$fQ7.2348178@p hobos.telenet-ops.be...[color=green]
> > Hi,
> >
> > How can I dispatch something from a worker thread to the UI thread ?
> >
> > Thanks in advance
> > greetings
> >
> >[/color]
>
>
> Read about Form.Invoke. The following code should give you the idea:
>
> public class Foo
> {
> public MyFormClass TheForm; //has a TextBox called textBox; inherits
> //from System.Windows. Forms.Form
>
> public delegate void UIMessageHandle r(String msg);
> public static UIMessageHandle r OnUIMsgProxy;
>
>
>
> public Foo(MyFormClass form)
> {
>
> OnUIMsgProxy = new UIMessageHandle r(OnUIMsg);
> TheForm = form;
> }
>
> public static void OnUIMsg(String msg) //invoked on UI thread
> {
> //add new msg to the top of the current text
> String curText = TheForm.textBox .Text;
> if (curText.Length > 28000)
> curText = curText.Substri ng(0,25000);
> TheForm.textBox .Text = msg + "\r\n" + curText;
> TheForm.textBox .Refresh();
> }
>
>
> /*
> To insert text to the UI from another thread, the other thread calls:
> Foo.UIMsgInvoke ("here is some text for the UI");
> /*
>
>
> public static void UIMsgInvoke(Str ing str)
> {
> //invoke the message writer on the UI thread
> Object [] msg = new Object[1];
> msg[0] = str;
>
> if (TheForm.IsHand leCreated)
> TheForm.Invoke( OnUIMsgProxy, msg);
>
> }
> }
>
>[/color]
Comment
-
Re: dispatch
that will do it,
Thanks,
Greetings
"Fred Mellender" <nospamPlease_f redm@frontierne t.net> wrote in message
news:i3Dfb.97$c s.13@news01.roc .ny...[color=blue]
>
> "Jhon" <Jhon@a.a> wrote in message
> news:K9Cfb.5803 5$fQ7.2348178@p hobos.telenet-ops.be...[color=green]
> > Hi,
> >
> > How can I dispatch something from a worker thread to the UI thread ?
> >
> > Thanks in advance
> > greetings
> >
> >[/color]
>
>
> Read about Form.Invoke. The following code should give you the idea:
>
> public class Foo
> {
> public MyFormClass TheForm; //has a TextBox called textBox; inherits
> //from System.Windows. Forms.Form
>
> public delegate void UIMessageHandle r(String msg);
> public static UIMessageHandle r OnUIMsgProxy;
>
>
>
> public Foo(MyFormClass form)
> {
>
> OnUIMsgProxy = new UIMessageHandle r(OnUIMsg);
> TheForm = form;
> }
>
> public static void OnUIMsg(String msg) //invoked on UI thread
> {
> //add new msg to the top of the current text
> String curText = TheForm.textBox .Text;
> if (curText.Length > 28000)
> curText = curText.Substri ng(0,25000);
> TheForm.textBox .Text = msg + "\r\n" + curText;
> TheForm.textBox .Refresh();
> }
>
>
> /*
> To insert text to the UI from another thread, the other thread calls:
> Foo.UIMsgInvoke ("here is some text for the UI");
> /*
>
>
> public static void UIMsgInvoke(Str ing str)
> {
> //invoke the message writer on the UI thread
> Object [] msg = new Object[1];
> msg[0] = str;
>
> if (TheForm.IsHand leCreated)
> TheForm.Invoke( OnUIMsgProxy, msg);
>
> }
> }
>
>[/color]
Comment
-
Re: dispatch
Fred Mellender <nospamPlease_f redm@frontierne t.net> wrote:[color=blue]
> Read about Form.Invoke. The following code should give you the idea:[/color]
<snip>
Just to be a bit more precise, it's not Form.Invoke but Control.Invoke.
This is handy as it means you don't need to find out which form a
control belongs to before invoking something on its UI thread.
--
Jon Skeet - <skeet@pobox.co m>
If replying to the group, please do not mail me too
Comment
-
Re: dispatch
Fred Mellender <nospamPlease_f redm@frontierne t.net> wrote:[color=blue]
> Read about Form.Invoke. The following code should give you the idea:[/color]
<snip>
Just to be a bit more precise, it's not Form.Invoke but Control.Invoke.
This is handy as it means you don't need to find out which form a
control belongs to before invoking something on its UI thread.
--
Jon Skeet - <skeet@pobox.co m>
If replying to the group, please do not mail me too
Comment
-
Re: dispatch
"Jon Skeet [C# MVP]" <skeet@pobox.co m> wrote in message
news:MPG.19ea27 a330f662fa9897e 2@msnews.micros oft.com...[color=blue]
> Fred Mellender <nospamPlease_f redm@frontierne t.net> wrote:[color=green]
> > Read about Form.Invoke. The following code should give you the idea:[/color]
>
> <snip>
>
> Just to be a bit more precise, it's not Form.Invoke but Control.Invoke.
> This is handy as it means you don't need to find out which form a
> control belongs to before invoking something on its UI thread.[/color]
oh, I see
that's usefull to know
thanks!
[color=blue]
>
> --
> Jon Skeet - <skeet@pobox.co m>
> http://www.pobox.com/~skeet
> If replying to the group, please do not mail me too[/color]
Comment
-
Re: dispatch
"Jon Skeet [C# MVP]" <skeet@pobox.co m> wrote in message
news:MPG.19ea27 a330f662fa9897e 2@msnews.micros oft.com...[color=blue]
> Fred Mellender <nospamPlease_f redm@frontierne t.net> wrote:[color=green]
> > Read about Form.Invoke. The following code should give you the idea:[/color]
>
> <snip>
>
> Just to be a bit more precise, it's not Form.Invoke but Control.Invoke.
> This is handy as it means you don't need to find out which form a
> control belongs to before invoking something on its UI thread.[/color]
oh, I see
that's usefull to know
thanks!
[color=blue]
>
> --
> Jon Skeet - <skeet@pobox.co m>
> http://www.pobox.com/~skeet
> If replying to the group, please do not mail me too[/color]
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