C# Discussion Boards - CodeProject

Paul Riley20-Mar-03 23:40

20-Mar-03 23:40

I did think about using ".html" but I figured it was possible, if unlikely, that someone might have it set up so that double-clicking an .html file would open a different browser from the default.

Daniel seems to have the perfect answer, but thanks anyway Smile | :)

Paul
We all will feed the worms and trees
So don't be shy - Queens of the Stone Age, Mosquito Song

Re: Default Browser

Daniel Turini20-Mar-03 23:10

Daniel Turini

20-Mar-03 23:10

Just call Process.Start(URL) and it'll call the default browser for you.

It's not the fall that kills you: it's the sudden stop - Down by Law, Jim Jamursch (1986)

Re: Default Browser

Paul Riley20-Mar-03 23:42

Paul Riley

20-Mar-03 23:42

Nice answer Daniel. Didn't really give much thought to that idea, I didn't think it would work with a URL like "www.mydomain.com/mysite" (ie. no mention of http or html) but somehow it does. Very cool, thanks.

Paul
We all will feed the worms and trees
So don't be shy - Queens of the Stone Age, Mosquito Song

Adding Line Numbers to a text box?

se99ts20-Mar-03 11:05

se99ts

20-Mar-03 11:05

i would like to add line numbers to a richTextBox, does anyone know of an easy way of doing this?

i was thinking about having two text boxes controlled by the same scroll bar but i dont know how to link them up?

or is it easier to use a different control to add the line numbers?

Any help would be extreemly useful as i dont remember seeing an example of this or anything similar anywhere!

Re: Adding Line Numbers to a text box?

Brandon B20-Mar-03 12:19

Brandon B

20-Mar-03 12:19

I was thinking about how to design a custom control with the same functionality for the richTextBox. My initial approach would be to use a panel along the left side and set its dock property to left and the richTextBox to fill. I think there would have to be some sort of callback to the panel so it knows to update the line numbers.

I do not know if this is the correct approach but it could be a start for further discussion on this topic.

I would be interested in seeing the best method to do this.

Regards,
Brandon

Re: Adding Line Numbers to a text box?

se99ts20-Mar-03 12:23

se99ts

20-Mar-03 12:23

My only reason for thinking of using two of the same text controls was an easy way to keep line numbers in the correct place as they could both share the same font and would have equal spaces in the line numbering i thought it would then be a simple task to get them to scroll together and somehow lock the textbox displaying the numbers so that it wouldn't highlight or selct on click, it would just appear next to it.

HINSTANCE

Andrei Matei20-Mar-03 9:29

Andrei Matei

20-Mar-03 9:29

Can anyone tell me how can I obtain the HINSTANCE of my app in C#?

Thanks a lot,

Andrei Matei

andreimatei@home.ro

Andrei Matei

andreimatei@home.ro

Re: HINSTANCE

Stephane Rodriguez.20-Mar-03 21:27

Stephane Rodriguez.

20-Mar-03 21:27

System.Diagnostics.GetCurrentProcess().Handle

Treeview 3 State checkbox

vlusardi20-Mar-03 9:09

vlusardi

20-Mar-03 9:09

Treeview checkboxes don't have a ThreeState style, so I added a third state to my treeview with these statements:

System.Windows.Forms.TreeNode n = e.Node.Parent;
Rectangle myRect = n.Bounds;
CheckBox myCheckbox = new CheckBox();
myCheckbox.SetBounds(myRect.X - 33 , myRect.Y + 1, myRect.Height,
myRect.Height);
myCheckbox.CheckState = CheckState.Indeterminate;
myCheckbox.FlatStyle = FlatStyle.System;
treeView1.Controls.Add(myCheckbox);
myCheckbox.Show();

Problems encountered:

The checkbox doesn't move when the treeview is scrolled... I've tried to set the Anchor property for the checkbox, but it has no effect...

Unable to Uncheck the checkbox, using Hide or by creating another checkbox with the Unchecked style and calling Show.

can someone tell me how to get the checkbox to scroll with its associated treeview node, and how to uncheck it?

thanks.

Re: Treeview 3 State checkbox

Stephane Rodriguez.20-Mar-03 21:35

Stephane Rodriguez.

20-Mar-03 21:35

If I see your history of posts, you seem to be expecting a lot from the .NET TreeView. May be a bit too much. My suggestion is to rely on Carlos H Perez's owner drawn treeview (Cp articles), which actually are wrappers over a WIN32 treectrl.

Re: Treeview 3 State checkbox

Member 72690920-Mar-04 8:12

Member 726909

20-Mar-04 8:12

Hey dude, did you finally get a solution for this.
If yes, could you please send the code.

thanks in advance
Srini

Shutting down a W2K computer

converdb20-Mar-03 9:04

converdb

20-Mar-03 9:04

I've got the following problem,

I use to call ExitWindowsEx in win98 environments to turn off the pc, but it doesn't work on w2k os,
What could I use to turn off/restart the computer on w2k??
(using vb or vc++ or any other .net tool)

I prefer not use WMI interfaces, any ideas??

Thanks in advance.

Just three words: void main(void)

Re: Shutting down a W2K computer

Mark Conger20-Mar-03 10:14

Mark Conger

20-Mar-03 10:14

Only one I can think of off the top of my head is InitiateSystemShutdownA from ADVAPI32.DLL. Not the prettiest, but that's what I usually use.

Mark Conger
Sonork:100.28396

Re: Shutting down a W2K computer

VoidMainVoid30-Mar-03 16:26

VoidMainVoid

30-Mar-03 16:26

You have to get privileges, here is the example for MSVC++, I think it could be easylly maded in C# or you could siply use a dll, here is the code

BOOL MySystemShutdown()<br />
{<br />
   HANDLE hToken; <br />
   TOKEN_PRIVILEGES tkp; <br />
 <br />
   // Get a token for this process. <br />
 <br />
   if (!OpenProcessToken(GetCurrentProcess(), <br />
        TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken)) <br />
      return( FALSE ); <br />
 <br />
   // Get the LUID for the shutdown privilege. <br />
 <br />
   LookupPrivilegeValue(NULL, SE_SHUTDOWN_NAME, <br />
        &tkp.Privileges[0].Luid); <br />
 <br />
   tkp.PrivilegeCount = 1;  // one privilege to set    <br />
   tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED; <br />
 <br />
   // Get the shutdown privilege for this process. <br />
 <br />
   AdjustTokenPrivileges(hToken, FALSE, &tkp, 0, <br />
        (PTOKEN_PRIVILEGES)NULL, 0); <br />
 <br />
   if (GetLastError() != ERROR_SUCCESS) <br />
      return FALSE; <br />
 <br />
   // Shut down the system and force all applications to close. <br />
 <br />
   if (!ExitWindowsEx(EWX_SHUTDOWN | EWX_FORCE, 0)) <br />
      return FALSE; <br />
<br />
   return TRUE;<br />
}<br />

I hope it helps.

You can read more about privileges here.

Signature...
I look for that at home... tomorrow

Re: Shutting down a W2K computer

converdb2-Apr-03 7:32

converdb

2-Apr-03 7:32

jero7207 wrote:
I hope it helps.

Sure, it does.
Thanks a lot friend. Big Grin | :-D

Just three words: void main(void)

Inter-app communication in C#

Strat61320-Mar-03 7:06

Strat613

20-Mar-03 7:06

i am very new to .Net and have decided to use C# in my next development project. my existing software is written in C++ and uses named pipes to communicate between appz. this existing app (which has the unfortunate acronym of "PMS" server) needs to updated to use SOAP messages over a tcp/ip network. currently the PMS uses serial communication. since xml serialization is so easy in .net and i already have all the necessary message classes, i am going to build a tcp communication layer outside of the PMS (did i mention i hate the name?!) i was hoping to utilize my existing pipe server in the PMS to communicate with this new C# app. any thoughts on the best way to approch this??

-613 "Code Poet"

"Real programmers don't work from 9 to 5. If any real programmers are around at 9am it's because they were up all night."

Question about methods.

Jon Newman20-Mar-03 6:51

Jon Newman

20-Mar-03 6:51

How would I call a method from a class i've not instantiated?

For example,

using CustomClasses;

.......

Binomial.RunIt();

rather than

Binomial b = new Binomial();

b.RunIt

Something similar to how Convert.ToString(...) works.

"De most compwehensive image seawch on de web."
- Google in Elmer Fudd Language
"But a fresh install - it's like having clean sheets"
- Chris Maunder Lounge 3 Mar '03

Jonathan 'nonny' Newman
Web Designer, Programmer, Lover, Visionary Leader...
Homepage [www.nonny.com] [^]

Re: Question about methods.

Daniel Turini20-Mar-03 6:59

Daniel Turini

20-Mar-03 6:59

declare it as "static".
like this:

public static string ToString(...)
{
}

You can also declare static fields on the class.
And can create a static "constructor" to initialize them:

class X
{
   static X()
   {
   }
}

Beware that your static methods may need synchronization (the "lock" statement on C#), since they may be called from several threads and probably will work on global data.

It's not the fall that kills you: it's the sudden stop - Down by Law, Jim Jamursch (1986)

Re: Question about methods.

Jon Newman20-Mar-03 7:10

Jon Newman

20-Mar-03 7:10

Daniel Turini wrote:
Beware that your static methods may need synchronization (the "lock" statement on C#), since they may be called from several threads and probably will work on global data.

I've tried a lock statement in the class...

public static void SomeStatic()
	{
              lock(this)
              {
		System.Windows.Forms.MessageBox.Show("Hello");
              }
	}

But it says you can't use 'this' from a static method. Any thoughts...

"De most compwehensive image seawch on de web."
- Google in Elmer Fudd Language
"But a fresh install - it's like having clean sheets"
- Chris Maunder Lounge 3 Mar '03

Jonathan 'nonny' Newman
Web Designer, Programmer, Lover, Visionary Leader...
Homepage [www.nonny.com] [^]

Re: Question about methods.

leppie20-Mar-03 7:21

leppie

20-Mar-03 7:21

Just remove the lock from that, that static function call should be thread save already. Smile | :)

I rated this article 2 by mistake. It deserves more. I wanted to get to the second page... - vjedlicka 3:33 25 Nov '02

Re: Question about methods.

Jon Newman20-Mar-03 7:29

Jon Newman

20-Mar-03 7:29

leppie wrote:
Just remove the lock from that, that static function call should be thread save already.

Cheers Wink | ;)

"De most compwehensive image seawch on de web."
- Google in Elmer Fudd Language
"But a fresh install - it's like having clean sheets"
- Chris Maunder Lounge 3 Mar '03

Jonathan 'nonny' Newman
Web Designer, Programmer, Lover, Visionary Leader...
Homepage [www.nonny.com] [^]

Re: Question about methods.

Michal Januszczyk21-Mar-03 12:51

Michal Januszczyk

21-Mar-03 12:51

You can not use this keyword in static context. Try this:

Class YourClass
{
public static void SomeStatic()
{
lock(typeof(YourClass))
{
//some code operating on shared/global data
}
}
...
}

Exception Management Application Block

Le centriste20-Mar-03 4:23

Le centriste

20-Mar-03 4:23

Exception Management Application Block[^]

Has anyone ever used it? If yes, what do you think of it?

Re: Exception Management Application Block

David Stone20-Mar-03 5:56

David Stone

20-Mar-03 5:56

I've played around with it a bit. All it really is, is a way to plugin different exception handlers into a standard framework. That being said, it would be really cool to just plugin different managers that send the exception data to an e-mail address or a SQL Server or an MSMQ stack or something else...

any idiot
can write haiku you just stop
at seventeenth syl
-ThinkGeek Fortunes

Need a URL Combo like Combo box

M Hanif20-Mar-03 1:18

M Hanif

20-Mar-03 1:18

I need a Url Combo like ComboBox that contains a collection of strings and while tyaping that should resize automatically and display the matching entries. Frown | :(

Its hard to improve perfection!!!

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