Re: raising an event - .NET (Core and Framework) Discussion Boards

kobybr9-Jul-04 9:11

9-Jul-04 9:11

Hi I creat new thread and run it:

System.Threading.ThreadStart st = new ThreadStart(MyRunig);<br />
tr = new Thread(st);<br />
tr.Name = "MyThread";<br />
tr.Start();<br />
at MyRunig :<br />
System.Windows.Forms.Application.Run();

so I have the new thread with window Q.
How can I send message from the main Thread (GUI) to the new one?
I am looking for Event driven mechanism
I used:

public void SendMyMessage()<br />
{ <br />
PostThreadMessage(fr.Handle,1122,(System.IntPtr)0,(System.IntPtr)0);<br />
 }

this is the way to send message?

<br />
[DllImport("User32.dll")]<br />
public static extern bool PostThreadMessage( System.IntPtr idThread, int msgID,System.IntPtr pm,System.IntPtr lm);

But I didn't get the message ( with WndProc )

Thanks
Koby

Re: like PotMssage and User define message

mav.northwind9-Jul-04 22:34

mav.northwind

9-Jul-04 22:34

If you want to call functions on controls belonging to the other thread then you have to define a delegate for each of these functions (for each different method signature at least) and then use Invoke() or BeginInvoke() with these delegates.
Take a look at Control's members for a description of these tunctions.

mav

Accepting date values

Richard Jones9-Jul-04 2:33

Richard Jones

9-Jul-04 2:33

Anyone know of an easy way to input dates in the CF platform?
I have a form with a few text edit fields.
The users will probably fudge it up and try wrong formats, etc.

All I can see for now, is breaking up the text, and using "new DateTime(y, m, d)"

Thanks.

"For all of our languages, we cannot communicate" - Christy Moore, Natives

Re: Accepting date values

Richard Jones12-Jul-04 7:18

Richard Jones

12-Jul-04 7:18

I've found the answer:

DateTime.Parse
DateTime.ParseExact

"For all of our languages, we cannot communicate" - Christy Moore, Natives

raising an event

Member 11412669-Jul-04 2:14

Member 1141266

9-Jul-04 2:14

I have a button on my form. i want to raising the button`s click event.

Re: raising an event

mav.northwind9-Jul-04 22:26

mav.northwind

9-Jul-04 22:26

Since no-one else seems to answer, I'll jump in:

Very easily by calling myButton.PerformClick();
But beware PerformClick(): It only works when the button is selectable.
When you for example derive a control from button and set its control style to Selectable==false, then PerformClick on this control will have no effect.

Regards,
mav

Re: raising an event

Member 114126612-Jul-04 0:24

Member 1141266

12-Jul-04 0:24

thank you.
I have an another question.
how I can rais an desired event(not only Click)?

Re: raising an event

mav.northwind12-Jul-04 2:00

mav.northwind

12-Jul-04 2:00

There's no consistent way for doing this.
If you want to raise the event from a derived control, then usually the base class offers protected OnEvent... methods to call, but if you're trying to raise an event from a different class than you're probably out of luck.
You usually have to call a method/set a property of the object you want to fire the event in such a way that the event desired is fired.
For example, if you want the TextChanged event of a TextBox to fire you can call

myTextBox.Text = "Some new Text";

and the event gets fired.
If you already have an event handler in your class for the desired event, then you can simply call this method by yourself.
For example:

// You already registered for the event
button1.Click += new EventHandler(this.button1_Click);
...
// later on you want to perform whatever is to be done as if the button was pressed
this.button1_Click(this, new EventArgs());
// or any other arguments you want to specify.

Regards,
mav

New .NET

Brendan Vogt8-Jul-04 23:26

Brendan Vogt

8-Jul-04 23:26

Does anyone know when the new release for SQL Server and the MSDN will be launched? I am thinking of buying an MSDN subscription, but I don't want to buy if I know if there is a new version coming soon.

Brendan

Re: New .NET

Roman Rodov15-Jul-04 15:22

Roman Rodov

15-Jul-04 15:22

If you buy an MSDN Subscription you get all the new software available to you as soon as it comes out. That's why it is called a "Subscription".

Frame Windows

smack_2k27-Jul-04 10:10

smack_2k2

7-Jul-04 10:10

Is there any way to add some controls on a frame windows in SDI/MDI applications (NOT toolbars) ?

Systemparametersinfo (Wallpaper)

MeConfused7-Jul-04 7:22

MeConfused

7-Jul-04 7:22

Is there anyone that would have an example of how to change the wallpaper using the systemparametersinfo. How do you use it, what needs to be impoted and an example code would be nice.Thanks. Smile | :)

# of projects in Start Page

Richard Jones7-Jul-04 2:14

Richard Jones

7-Jul-04 2:14

How can I display more than 10 projects in the Start Page? (in studio)

"For all of our languages, we cannot communicate" - Christy Moore, Natives

Re: # of projects in Start Page

Colin Angus Mackay7-Jul-04 2:24

Colin Angus Mackay

7-Jul-04 2:24

Change the number of Most Recently Used projects in the options dialog. The affects the list of projects in the file menu also.

"If a man empties his purse into his head, no man can take it away from him, for an investment in knowledge pays the best interest." -- Joseph E. O'Donnell

The Second EuroCPian Event will be in Brussels on the 4th of September

Can't manage to P/Invoke that Win32 API in .NET? Why not do interop the wiki way!

Re: # of projects in Start Page

Richard Jones8-Jul-04 1:55

Richard Jones

8-Jul-04 1:55

Thanks.

"For all of our languages, we cannot communicate" - Christy Moore, Natives

Button Focus in Compact Framework

ripi10006-Jul-04 23:45

ripi1000

6-Jul-04 23:45

Hello @all,

in my Mobile Application (Windows Mobile2003 / CompactFramework / VB.NET) i programmaticly set the focus to a button.

But the Button dont't get the focus??

If i debug the code it works fine (if I can belive the debugger), but the button don't get the focus.

I really don't know what to do. Is anyone here who got the same problem??

Any help is welcome

Regards
Sascha

Getting and Setting the Master and Wave Volume

bneacetp5-Jul-04 21:37

bneacetp

5-Jul-04 21:37

How would I go about using the .NET Framework to get and set the Master and Wave Volume of the user's computer? Can it be done with .NET, or is Direct Sound required to do this? Any leads in the right direction would be appreciated.

Happy Programming and may God Bless!

"Your coding practices might be buggy, but your code is always right."

Internet::WWW::CodeProject::bneacetp

Re: Getting and Setting the Master and Wave Volume

mav.northwind9-Jul-04 22:47

mav.northwind

9-Jul-04 22:47

You can P/Invoke waveOutSetVolume() to set the volume of a waveform audio output device.

[DllImport("winmm.dll")]
public static extern int waveOutSetVolume(IntPtr hwo, UInt32 dwVolume);

...
waveOutSetVolume(IntPtr.Zero, 0xFFFFFFFF);
...

This sets both channels of master volume to maximum.
For special target devices you might have to use other WaveOut-functions, but they're all documented in the platform SDK.

Regards,
mav

Re: Getting and Setting the Master and Wave Volume

bneacetp9-Jul-04 23:06

bneacetp

9-Jul-04 23:06

Thanks for your reply. Big Grin | :-D

Happy Programming and may God Bless!

"Your coding practices might be buggy, but your code is always right."

Internet::WWW::CodeProject::bneacetp

MTS

hatim_ali5-Jul-04 18:02

hatim_ali

5-Jul-04 18:02

hi friends,

heard that MTS is not supported in .NET Framework. I guess .NET framework supports COM+ runtime services so how come MTS is not supported ??

tHanKs,
Hatim Ali.

Re: MTS

Sendilkumar.M9-Jul-04 21:16

Sendilkumar.M

9-Jul-04 21:16

Hi ali

I guess your are using incorrect version of MTS.If you are using 2000 Professional surely i will not support for COM+.For deploying COM+ components use 2003 server or Latest version of MTS(Non NT flavour)

Thanks

M.Sendilkumar
Senior Software Engineer
TVS Infotech
Chennai,TamilNadu,India.
98413 27002

Re: MTS

Serge Lobko-Lobanovsky16-Jul-04 6:52

Serge Lobko-Lobanovsky

16-Jul-04 6:52

M.Sendilkumarm wrote:
I guess your are using incorrect version of MTS.If you are using 2000 Professional surely i will not support for COM+.

Are you sure? Windows 2000 Professional does have support for COM+, and .NET components can be published in the COM+ catalog using the System.EnterpriseServices namespace.

COM+ is "COM + MTS". MTS was introduced in NT 4.0, and became part of the COM+ services in Windows 2000.

Regards,
Serge (Logic Software, Easy Projects .NET site)

Re: MTS

Serge Lobko-Lobanovsky16-Jul-04 6:54

Serge Lobko-Lobanovsky

16-Jul-04 6:54

Windows 2000 Professional does have support for COM+, and .NET components can be published in the COM+ catalog using the System.EnterpriseServices namespace.

COM+ is "COM + MTS". MTS was introduced in NT 4.0, and became part of the COM+ services in Windows 2000 under the MS DTC (distributed transaction coordinator).

So, NT MTS (version 1.0) is not supported, but 2000 COM+ (DTC) is.

Regards,
Serge (Logic Software, Easy Projects .NET site)

App works on OS with no .NET

smack_2k25-Jul-04 9:28

smack_2k2

5-Jul-04 9:28

I want to start a project in VisualC++, with VS .NET 2003. Is there any way to make the app work on a machine that has .NET framework not installed ? If not is there a VC++ (or higher) with no .NET ?

Re: App works on OS with no .NET

Mike Dimmick5-Jul-04 12:52

Mike Dimmick

5-Jul-04 12:52

Yes. Just make sure you select one of the unmanaged project types, from the ATL, MFC or Win32 categories. Obviously you can't use any .NET features.

Stability. What an interesting concept. -- Chris Maunder

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