C# Discussion Boards - CodeProject

Matt Gerrans21-Oct-05 16:22

21-Oct-05 16:22

By the way, if you are just starting out, you should know that using goto is a very bad habit -- not one you want to develop.

Matt Gerrans

Re: Beginner Question: Data type issue

ivelander21-Oct-05 16:28

ivelander

21-Oct-05 16:28

I only used it 6 times in less that 100 lines of code... not bad. Haha. Thanks for all the advice, the good news is that things can only get better from here. I'm sure I will be back for more help.

Re: Beginner Question: Data type issue

Matt Gerrans22-Oct-05 7:19

Matt Gerrans

22-Oct-05 7:19

If you are interested to see how it would be done without any gotos post back. Even better, try doing it yourself without any gotos and if you have in trouble in the process, post your questions here again. After you have it in the goto-free state, you can decide for yourself whether the code seems better.

(Actually, with a small example like this, it will not be clearly better, but I've seen very large pieces of production code that use gotos and that becomes hideously incomprehensible and hard to maintain).

Matt Gerrans

Please help...

KORCARI21-Oct-05 12:39

KORCARI

21-Oct-05 12:39

Need to build a two dimensional math graph.Anybody can give me any ideas about how to do it?

Moving a graphic on a form

har04mich21-Oct-05 11:41

har04mich

21-Oct-05 11:41

I have this graphic, that I want to move up and down the form by the user clicking on one button to go up and one button to go down, it sounds like a game, but it really isn't. I have no idea on how to make or even start on this project, can it be done with C#.Net? and do I use DirectX? or the Drawing Class? Confused | :confused:

Re: Moving a graphic on a form

Ali Beirami21-Oct-05 12:08

Ali Beirami

21-Oct-05 12:08

<code
private void="" btnmove_click(object="" sender,="" system.eventargs="" e)
="" {
="" this.location="new" point(this.location.x="" ,="" this.location.y="" -50);
="" which="" moves="" current="" form="" 50="" pix="" up="" and="" so="" on="" ..=""
="" }
="">
I hope this works.

Re: Moving a graphic on a form

S. Senthil Kumar21-Oct-05 20:42

S. Senthil Kumar

21-Oct-05 20:42

How are you planning to display the graphic? Through a standard PictureBox control? Or are you going to draw it yourself?

Either case, you need to track the current position of the graphic using a variable and update the position in the button click.

Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro

Re: Moving a graphic on a form

Anonymous22-Oct-05 1:04

Anonymous

22-Oct-05 1:04

It is actually am Image, so I guess a picture box control.

Re: Moving a graphic on a form

S. Senthil Kumar22-Oct-05 1:15

S. Senthil Kumar

22-Oct-05 1:15

Then it becomes fairly simple. Just change the Top/Left properties of the PictureBoxControl and you're done.

Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro

First Tablet PC Application using C#

celllllllll21-Oct-05 11:25

celllllllll

21-Oct-05 11:25

Hi,

I want to make Tablet PC application using C#.
I was serching on google and found that I need to "add reference" (in Solution Explorer) . And then Need to add the reference of "Microsoft Tablet PC API" as a component name but I am not able to find that. What should I do?

Thanks
I would appreciate if you could check this on the platform.

Thanks in advance

Preeti9

Combobox problem

Boggy21-Oct-05 11:02

Boggy

21-Oct-05 11:02

Hi,

My C# / Winform program talks to a COM (OLe Aotomation) server. I need
to pass the handlw of a combobox to the COM server and the server will
populate the combobox by sending CB_ADDSTRING message. The result is: the
combobox got populated but when I dropdowm (the combobox is DROOPDOWNLIST
style) I got very narrow dropdown part with a tiny scroll bar, and if I
select an item I got a System.ArgumentOutOfRangeException. In code just
after the server populated the combobox I can see that MyCombobox.Items.Count is 0. We know in C# .NET code we add string to combobox this way: MyCombobox.Items.Add("abc"). It seems if we use the
CB_ADDSTRING to add strings to a .NET combobox the Items is empty.

Any one got the similar problem?
Thanks in advance for any help.

Bogang Tian

Re: Combobox problem

Ali Beirami21-Oct-05 12:28

Ali Beirami

21-Oct-05 12:28

Windows Controls are not thread safe.Any
attemp to play with them in external code may result to undesirable results such as yours.

If you can return that string (for example via an event in that activex) to your code this
whould do the job.

<br />
private delegate void AddTextDelegate(String strText); <br />
private void AddText(String strText) <br />
{ <br />
     MyComboBox.Items.Add(strText); <br />
} <br />

and in your event handler:

<br />
Invoke(new AddTextDelegate(AddText), <br />
     new Object[] { strText});<br />

I hope this works.

Re: Combobox problem

Boggy21-Oct-05 15:35

Boggy

21-Oct-05 15:35

Thanks for your help.

That "COM server" is only an OLE Automation server. It does not fire any
event. Only thing it offers is a member function that takes an int as
the handle of the combobox, and populate the combobox by sending CB_***
messages.

I am curious: after calling the COM server member function I can see
the combobox is populated with data. Where are these data stored? Any
way to get them and put them them into the Items collection?

Thanks again.

Bogang Tian

StreamWriter.WriteLine() doesn't complete on last line!

Lord Kixdemp21-Oct-05 10:34

Lord Kixdemp

21-Oct-05 10:34

Hello everyone! Big Grin | :-D

OK, I have a program that has to find files inside of some specific directories and then add the filenames to a string array. There's like 18,000 files... My problem: The last line on the file comes cut out. I thought this was some file limit problem, so I broke it down into 2 files. Still the problem persisted. Then I went for 4. Still. Then I went to 6. STILL! Anyone know what's wrong here? The files are on a network drive, but I don't think that's it, since I've seen this problem a long time ago on regular drives. Anyone know how to fix it? Thanks! Wink | ;-)

Sulfurik K. Nosferathus (Darth_Sulfur)
www.SulfurMidis.com
www.SulfurSoft.tk
http://www.BeepXtreme.tk
[ftp://][http://][hotline://]tsfc.ath.cx

Re: StreamWriter.WriteLine() doesn't complete on last line!

Robert Rohde21-Oct-05 10:49

Robert Rohde

21-Oct-05 10:49

Are you calling Flush and/or Close on the stream when you are finished?

Re: StreamWriter.WriteLine() doesn't complete on last line!

Lord Kixdemp21-Oct-05 13:13

Lord Kixdemp

21-Oct-05 13:13

I didn't think that was important at all... WTF | :WTF:

But thanks! It worked! Cool | :cool:

Sulfurik K. Nosferathus (Darth_Sulfur)
www.SulfurMidis.com
www.SulfurSoft.tk
http://www.BeepXtreme.tk
[ftp://][http://][hotline://]tsfc.ath.cx

Re: StreamWriter.WriteLine() doesn't complete on last line!

Matt Gerrans21-Oct-05 16:02

Matt Gerrans

21-Oct-05 16:02

"It worked!" WTF | :WTF:

?

This seems funny to me, because it implies that closing a file after writing to it is some kind of clever trick or technique as opposed to what you should always do.

BTW, this sounds like something you might want to do with a script (Python or Ruby, or (if you must) Perl, etc.).

Matt Gerrans

-- modified at 22:03 Friday 21st October, 2005

Re: StreamWriter.WriteLine() doesn't complete on last line!

Lord Kixdemp21-Oct-05 17:59

Lord Kixdemp

21-Oct-05 17:59

Well... I remember writing to files and seeing them empty afterwards... that fixed by setting AutoFlush to true, but I hardly ever close my files... :P

Sulfurik K. Nosferathus (Darth_Sulfur)
www.SulfurMidis.com
www.SulfurSoft.tk
http://www.BeepXtreme.tk
[ftp://][http://][hotline://]tsfc.ath.cx

Help me...

KORCARI21-Oct-05 9:56

KORCARI

21-Oct-05 9:56

I have a .bmp file and I need to do it SplashScreen for my form.Anybody can tell me how to do it?

Re: Help me...

enjoycrack21-Oct-05 10:26

enjoycrack

21-Oct-05 10:26

hi there,

I'm pretty sure that there are a lot of articles about this on CP site.
below is just one of them
Splash Screen

Hope this helps
<< >>

Re: Help me...

André Ziegler21-Oct-05 10:26

André Ziegler

21-Oct-05 10:26

Take a look at these articles:

http://www.codeproject.com/csharp/PrettyGoodSplashScreen.asp

http://www.codersource.net/csharp_splash_screen.aspx

André

cryptostream.Close() exception

Anonymous21-Oct-05 9:35

Anonymous

21-Oct-05 9:35

i make a correct cryptostream object and make the while loop that is in msn example but when i call .close() method it write correctly (i guess) the file crypted infact i can see it on my HD and it is crypted (it is a kb bigger the origina) but i get the following exception:
The lenght of the crypted file is not correct.
What does it mean? where could i wrong? D'Oh! | :doh:

flat files in .net

dvsr21-Oct-05 7:57

dvsr

21-Oct-05 7:57

Hi,

Can Any one can tell How to read data from the flat files(txt files) to DataSet

Thanks and Regards,
Subbu

Re: flat files in .net

Samar Aarkotti21-Oct-05 8:34

Samar Aarkotti

21-Oct-05 8:34

what do you mean, dataset is simple, which take string/int values , just break the file and write to dataset in the required column's, do you need a sample code.

Re: flat files in .net

Turtle Hand21-Oct-05 9:06

Turtle Hand

21-Oct-05 9:06

use the text ole db provider.

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.