C# Discussion Boards - CodeProject

Rickard Andersson²⁰3-Dec-02 1:47

3-Dec-02 1:47

djkno3 wrote:
public int property
{
set {property = value;} //This throws the exeption
}

You're assigning the value to the property itself which is wrong.
You'll need a member varible of type int, so change the code to this:

public int MyPropertyName
{
   set{ myMemberInt = value; }
}

Rickard Andersson@Suza Computing
C# and C++ programmer from SWEDEN!
UIN: 50302279
E-Mail: nikado@pc.nu
Speciality: I love C#, ASP.NET and C++!

Re: Converting Texbox.Text to int 32

djkno33-Dec-02 3:09

djkno3

3-Dec-02 3:09

Thanks that was the problem. To get the value do I use the same variable eg return myMemberInt? It works like this but is it the correct way?

Re: Converting Texbox.Text to int 32

kaschimer3-Dec-02 4:01

kaschimer

3-Dec-02 4:01

To create the read/write property you want, you will want to create a get:

<br />
public int MyPropertyName<br />
{   <br />
    set{ myMemberInt = value; }<br />
    get{ return myMemberInt; }<br />
}<br />

RabidK

Re: Converting Texbox.Text to int 32

djkno33-Dec-02 4:50

djkno3

3-Dec-02 4:50

thanks that's what I have I was just wondering if it was correct Big Grin | :-D

or if I was just getting the right answer by chance and have a nice bug pop up later because of it. thanks

Re: Converting Texbox.Text to int 32

Pyt3-Dec-02 1:47

Pyt

3-Dec-02 1:47

It looks like the value entered in the TextBox is too big for an Int32.

MDSN:
The Int32 value type represents signed integers with values ranging from negative 2,147,483,648 through positive 2,147,483,647.

Pyt

Pyt.

Re: Converting Texbox.Text to int 32

djkno33-Dec-02 3:12

djkno3

3-Dec-02 3:12

I guess I should have said that the value was less then the max for an int 32 (eg It was 32) sorry Frown | :(

class diagram

Anonymous3-Dec-02 0:54

Anonymous

3-Dec-02 0:54

i have developed an application in dot net and i want to get its class diagram is there any facility available for that purpose in visual studio dot net ?

Re: class diagram

Ranjan Banerji3-Dec-02 2:09

Ranjan Banerji

3-Dec-02 2:09

I thought, but I could be wrong, that VS .Net came with some version of Visio that would let you do this.

Re: class diagram

Michael P Butler3-Dec-02 3:30

Michael P Butler

3-Dec-02 3:30

If you have the Architect version then you should find a copy of Visio on the installation media. It isn't installed by default. When installed there is an option to Reverse Engineer added to the Project menu.

Michael

Fat bottomed girls
You make the rockin' world go round -- Queen

Re: class diagram

kaschimer3-Dec-02 4:11

kaschimer

3-Dec-02 4:11

There is an add-in project here on CodeProject that might be useful to you if you don't have a copy of VSNET Ent Arch and Visio for Ent Arch.

It's called PocketUML and from what I have seen, it does a pretty fair job:

http://www.codeproject.com/macro/pocketuml.asp[^]

I've downloaded it, but don't really use it much because I have the Ent Arch editions of both.

On a side note, does anyone know if Visio for Ent. Arch. supports full round-trip engineering? Or team collaboration?

RabidK

Request for adv C# tips & tricks

ThaRudeDude2-Dec-02 20:58

ThaRudeDude

2-Dec-02 20:58

Hi all,
Since I have seen some of the greatest C# code on this site; I'd sure appreciate your contribution to a presentation I will be delivering. I'm looking for radical cool C# tips & tricks to demo. You will be mentioned in my presentation, if you do not object. So any cool stuff with unsafe code; com interop; or even general .Net cool tricks are welcome.

You (already) have my eternal gratitude.
Rudi

Re: Request for adv C# tips & tricks

SimonS2-Dec-02 21:39

SimonS

2-Dec-02 21:39

I've given this type of talk a bunch of times since .NET came out and it really depends on the type of audience.

If you use instant messenger then we can chat: simon_stewartDEFINITELYNOTFORSPAM@hotmail.com -- removing capital words. Poke tongue | ;-P

Cheers,
Simon

"From now on, if rogue states want to buy weapons of mass destruction, they're going to have to go on eBay," Mr. Bezos said.

Looping Problem.

Steve McLenithan2-Dec-02 19:59

Steve McLenithan

2-Dec-02 19:59

I have finally found a good use for looping in a small tool I am creating.

maxBits: is defined elsewhere in the code as a maximum integer that cannot be passed.
subs: is also defined elsewhere as an integer that needs to be passed by at least a value of 2.

---------------------------------------
A little more in depth:
IE- (2^x), where "x" is an integer value.
What this is really trying to find is the "x" power of 2's value, that is right after the value of "subs" but that power cannot be higher than "maxBits" and if it is, it is invalid and a message needs to be passed to the user.

Here is my code:
------------------------------------

// newSubs is the value of the "x" power of 2 right after the value of "subs" int newSubs = 0; int n = 0; for (int i = 0; i <= maxBits; i++) {
while (n < subs)
{
newSubs = 2^i;
n = tSubs;
}
}

------------------------------------

It just isn't working and I don’t know why. I have tried many different cominations of looping structures to get the effect I need. With the code given above, the program crashes when a value of 3 is assigned to "subs".

Can anyone help me with the looping structure? I am going insane just thinking about it Wink | ;)

Thanks for the help.
Regards,

********************
* SteveMcLenithan
* <a href="mailto:steve@steve-mac.com">steve@steve-mac.com</a>
* <a href="http://steve-mac.com">http://steve-mac.com</a>
********************

Re: Looping Problem.

Steve McLenithan2-Dec-02 20:01

Steve McLenithan

2-Dec-02 20:01

looks like my code didnt paste right the first time. hopefully it will work now...

// newSubs is the value of the "x" power of 2 right after the value of "subs"
int newSubs = 0;
int n = 0;
for (int i = 0; i <= maxBits; i++)
{
while (n < subs)
{
newSubs = 2^i;
n = tSubs;
}
}

********************
* SteveMcLenithan
* steve@steve-mac.com
* http://steve-mac.com
********************

Re: Looping Problem.

Daniel Turini2-Dec-02 22:14

Daniel Turini

2-Dec-02 22:14

Well, in C# the '^' operator is the XOR operator. To accomplish what you need you can:

1. Use Math.Pow method
2. If you need 2^x you can always use 1 << x, which will operate only in integral types (byte, short, int and long) and is super fast.

I see dumb people

RichTextBox Scrollbar

ragear2-Dec-02 16:30

ragear

2-Dec-02 16:30

I have a richtextbox where things will be printed in it from other textbox's. But when the richtextbox is filled with text, instead of the scrollbar automatically scrolling down as new text is appended to the richtextbox, the scrollbar stays at the top and the new text can't be seen unless the person moves the scrollbar himself. Is there a property which allows me to change the location of the scrollbar so that the scrollbar automatically moves down as new text is appended to the richtextbox?

Thanks Sleepy | :zzz:

Re: RichTextBox Scrollbar

leppie3-Dec-02 1:17

leppie

3-Dec-02 1:17

If I remember correctly I did something like this:

richtextbox.Select();
richtextbox.SelectionStart = richtextbox.TextLength - 1;
richtextbox.ScrollToCaret();

Or somehing along those lines, alternatively, you can use interop for more control.

Smile | :)

DBHelper - SQL Stored Procedure Wrapper & Typed DataSet Generator for .NET

Re: RichTextBox Scrollbar

ragear3-Dec-02 14:55

ragear

3-Dec-02 14:55

Thanks, it works fine except for now when I hit enter in the richtextbox, it will make a new line. I can't input any other letter or anything, enter is the only thing that changes richtextbox... I'm sure I'll figure out how to stop it sooner or later, but do you know why it does this?

Some Bugs While Running C# Application On Win98

yccheok2-Dec-02 14:16

yccheok

2-Dec-02 14:16

i have a c# program where i run perfectly no problem under win2000.
however, the problem occur when i try to run in win98 installed with
.NET Framework 1.0.3705.

(1)i try to hide the main form and display the system tray icon when
user click on minimize button. i put the following code in main form
constructor:
------------------------------------------------------------
this.Resize += new System.EventHandler(this.frmMain_Resize);
this.notifyIcon1.DoubleClick += new
System.EventHandler(this.notifyIcon1_Click);
------------------------------------------------------------

the function of frmMain_Resize look like:
-----------------------------------------
private void frmMain_Resize(object sender, System.EventArgs e)
{
if( this.WindowState == FormWindowState.Minimized )
this.Visible = false;
}
-----------------------------------------

the function of notifyIcon1_Click look like:
-----------------------------------------
private void notifyIcon1_Click(object sender, System.EventArgs e)
{
this.Show();
this.WindowState = FormWindowState.Normal;
this.Activate();
}
-----------------------------------------

when i click minimize button of the main form, main form hide and the
system tray icon display. i double click the system tray icon and the
main form show up again. then when i click on minimize button again,
nothing happen.

i realize the frmMain_Resize wont be execute. this problem only happen
when i run this application in win98. win2000 work perfectly.

(2) please refer http://www.geocities.com/yccheok/net/prob.html for
screen shoot.
i try to display a modeless dialog with code
--------------------------------------------
if(frmViewLive.IsDisposed)
{
frmViewLive = new FrmViewLive(this);
this.AddOwnedForm(frmViewLive);
frmViewLive.Show();
frmViewLive.Activate();
}
else
{
this.AddOwnedForm(frmViewLive);
frmViewLive.Show();
frmViewLive.Activate();
}
--------------------------------------------
although i click on the close button of the frmViewLive, the task bar
still displayed its "Live Image" title. when only i click on the "Live
Image" task bar, only will the task bar disappear. this is strange coz
win2000 has no this kind of problem.

may i noe how can i solve this problem? thank you.

regards
yccheok

Re: Some Bugs While Running C# Application On Win98

Jeff J3-Dec-02 16:20

Jeff J

3-Dec-02 16:20

1) The message you want to catch is not normally exposed by .Net. Clicking on the minimize button, or by using shortcut keys, etc., sends a WM_SYSCOMMAND message to the form's window, along with a command value of SC_MINIMIZE. There is a way to capture these messages, however, so you can really polish your app.

In your app's constructor, add:

this.SetStyle(ControlStyles.EnableNotifyMessage, true);

That will allow you to override the OnNotifyMessage() function, which catches all window messages. So add to your app's methods:

protected override void OnNotifyMessage(Message msg) {<br />
<br />
   if (msg.Msg == 0x0112  &&          //WM_SYSCOMMAND<br />
       (uint)msg.WParam == 0xF020) {  //SC_MINIMIZE<br />
<br />
      MessageBox.Show("Minimize activated");<br />
   }<br />
}

I'm fairly sure that no matter what platform you run on, the message box will fire on any minimise event. That includes minimising from the taskbar, or any other means. Of course, you'll want to replace the message box with your form-hiding code. No other event will falsely trigger minimising either.

Cheers

Re: Some Bugs While Running C# Application On Win98

yccheok3-Dec-02 16:43

yccheok

3-Dec-02 16:43

thanks n i will try it out 2night. but can u tell me why

this.Resize += new System.EventHandler(this.frmMain_Resize);

won't work in win98?

thank you.

regards
yccheok

Re: Some Bugs While Running C# Application On Win98

Nick Parker3-Dec-02 16:49

Nick Parker

3-Dec-02 16:49

yccheok wrote:
won't work in win98?

You can't run .NET applications on Windows 98.

Nick Parker

Not everything that can be counted counts, and not everything that counts can be counted. - Albert Einstein

Re: Some Bugs While Running C# Application On Win98

James T. Johnson3-Dec-02 16:59

James T. Johnson

3-Dec-02 16:59

Nick Parker wrote:
You can't run .NET applications on Windows 98.

Sure you can, its Windows 95 that isn't supported Smile | :)

James

- out of order -

Re: Some Bugs While Running C# Application On Win98

Nick Parker3-Dec-02 18:17

Nick Parker

3-Dec-02 18:17

James T. Johnson wrote:
Sure you can, its Windows 95 that isn't supported

Oooppps, I was thinking of the .NET Framework SDK requirements.[^]. Thanks James, I think it time for me to go to bed now. Sleepy | :zzz:

Nick Parker

Not everything that can be counted counts, and not everything that counts can be counted. - Albert Einstein

Re: Some Bugs While Running C# Application On Win98

Jeff J3-Dec-02 20:37

Jeff J

3-Dec-02 20:37

Honestly, I'm not sure, although I do know that there were some changes in message handling, that started with W2K. I was only thinking in terms of giving you a better solution to your problem, and had not looked into the cause of your difficulties.

A simple way to find out, would be to temporarily add logging to app (or add a textbox), and list every message received in your new handler. Then just compare the list of events triggered after clicking the minimise button in W98 and W2K. You could do the same thing with Spy++ too.

One of the frustrations I have with .Net, is that I can't see how things work like is possible with MFC/ATL/WTL. So the answers aren't always obvious.

Cheers

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