C# Discussion Boards - CodeProject

Re: finding a record in a table

25-Sep-04 9:19

Good - someone remembers what I say 50 times a day, it seems. Smile | :)

Of course you visit here often. I know many don't and maybe post a couple messages to CodeProject and never return (I feel so used Unsure | :~

). I'm thinking about writing an article with all the stuff I always say and just start directing people toward it each time I have to say it once again.

What do you think? I know Nick Parker told me I should long ago (and we're actually friends in the real workd), so I think I may.

This posting is provided "AS IS" with no warranties, and confers no rights.

Software Design Engineer
Developer Division Sustained Engineering
Microsoft

[My Articles]

Re: I remembered!

eggie525-Sep-04 11:08

eggie5

25-Sep-04 11:08

Yeah, I remember you mentioned that Nick and you were working on one a while ago... I was pretty intersted in it. I imagine it would be quite large though.... Are you thinking of sorta a "FAQ Article"?

/\ |_ E X E GG

Brian Delahunty25-Sep-04 0:04

Brian Delahunty

25-Sep-04 0:04

Yeah.. I know. I personally hate animated/moving stuff on pages.... But NEVER would have been a good candidate for a blink there Smile | :)

The problem I see with people using concatenation for SQL is that most books on SQL don't deal with issues like SQL Injection. I haven't looked at many (we have 2 or 3 T-SQL and PL/SQL references books on shelves in work) but those that I did rarely if ever mentioned the danger of SQL Injection... It's as though they see it as somthing that needs to be addressed by programming books and data access references only. It drives me insane to thnk that students throughout universities and colleges around the world are not being instructed on the simple dangers.

Regards,
Brian Dela Smile | :)

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Re: finding a record in a table

Heath Stewart25-Sep-04 9:24

Re: IE Hosted UserControl

25-Sep-04 9:24

Brian Delahunty wrote:
It drives me insane to thnk that students throughout universities and colleges around the world are not being instructed on the simple dangers.

What should really drive you insane - and the reason, most often, for students not being taught what they should - is that the professors don't know! Granted, there's exceptions, especially at places like MIT, Berkely, CMU, and others, but many professors themselves don't know.

Besides, I'm a big fan of self-discovery and research. I learned far more before and during - but not in - college than I ever did at college. It takes a real interest in computer science and engineering (depending on whether your into the softer- or harder-side of computers...maybe even both) to be good and that, I believe, is what separates the good from the, well, bad.

IE Hosted UserControl

OBRon24-Sep-04 3:24

OBRon

24-Sep-04 3:24

I have a couple of questions regarding a System.Windows.Forms.UserControl derived control that is to be hosted in IE. Basic functionality seems to work, but I'm unable to figure out how to EnableVisualStyles...since IE is the parent application. All buttons on the control appear flat and square. Attempting to invoke the Application.EnableVisualStyles() call within my control's Load event causes IE to GPF. Attempting to host a Form within my control that contains a button with the flat style set to System still results in flat buttons.

Also, I'm not able to get keyboard hot keys to work for any buttons on the user control. The tab key works for moving focus between buttons, and the mouse key works, but if I hit alt-char to invoke the hot key...nothing.

Am I limited to creating owner draw buttons and handling keyboard events at the control level? Anyone have any experience in this area?

Thank you in advance.

Ron Ward

Heath Stewart24-Sep-04 6:02

invisible items in combobox and listbox

24-Sep-04 6:02

I've done quite a bit of work in this area dating way back to the .NET 1.0 beta days.

As far as hot keys, understand that only dialogs process characters and may or may not pass those messages to child controls, such as your UserControl. In the case of IE, it most likely won't because a site could hijack your settings (the web is a very dangerous place to visit, probably even more hostile than Iraq right now!). That would be my educated guess.

As far as visual styles, calling Application.EnableVisualStyles() must be done in an application - not your control. What this does is load a general manifest from the .NET Framework directory (ex: %WINDIR%\Microsoft.NET\Framework\v1.1.4322) BEFORE controls are created, which encapsulate the Windows Common Controls. Once those are loaded into an address space for a process and used by a particular module, that module cannot use two different versions (but the process can, IIRC).

You need to instead embed a manifest in your PE/COFF executable (not the assembly itself, rather, the manifest of resources) using a particular ID.

For starters, read my article Windows XP Visual Styles for Windows Forms[^], which describes the "old" way (still supported) of embedding manifests as Win32 resources. You'll also want to read Visual Styles[^] on MSDN.

Another article you may find interesting about making your embedded UserControl scriptable (as well as exposing events), take a look at a very old article of mine on a different site, User Controls for Winodws and the Web[^].

This posting is provided "AS IS" with no warranties, and confers no rights.

Software Design Engineer
Developer Division Sustained Engineering
Microsoft

[My Articles]

alvin@datell24-Sep-04 2:34

alvin@datell

24-Sep-04 2:34

Hello,

I Hope someone can help me with my problem.

I Do the following:
- Create application
- Put combobox on main-form
- Add values in combo-box collections

When I run the application the items in de combobox are not visible. When I click on an invisible item, the value appears in the combobox, so the items are present.

When I copy the application to any other pc and run it, it all works fine, there is no problem.

When I build the application on the other pc and run it on mine, it all works fine too.

My colors are correct (background and textcolor are definitly not the same color).

Help!!!

sreejith ss nair24-Sep-04 3:47

sreejith ss nair

24-Sep-04 3:47

hi,

Check the forcolor of your combobox and make sure that the color is not Transparent. Smile | :)

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S r e e j i t h N a i r
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alvin@datell24-Sep-04 3:50

alvin@datell

24-Sep-04 3:50

Thanks for your answer.

I checked de forecolor. Its value is WindowText (In my case black)

sreejith ss nair24-Sep-04 3:57

sreejith ss nair

24-Sep-04 3:57

hi,
Did you installed any theams on your machine. Smile | :)

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S r e e j i t h N a i r
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alvin@datell24-Sep-04 4:05

alvin@datell

24-Sep-04 4:05

sreejith ss nair24-Sep-04 4:07

sreejith ss nair

24-Sep-04 4:07

hi,
I am really sorry. Cry | :((

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S r e e j i t h N a i r
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Filipe Peixinho11-Nov-04 10:19

Filipe Peixinho

11-Nov-04 10:19

I had the same problem and was caused by McAfee VirusScan Enterprise 8.0i's Buffer overflow protection.

I tried to disable it and my comboboxes start working well again.

If someone has the same problem read the document in
this location

Word_Counter

sardonicus24-Sep-04 2:06

sardonicus

24-Sep-04 2:06

simply, i want to make a c# program that counts words in a sentence entered by the user. i know a method to count no. of characters in a certain sentence, but what about words, what's the idea ?! i'd appreciate it if anyone could help here.

Moon Boy24-Sep-04 2:17

Moon Boy

24-Sep-04 2:17

<br />
string[] words = sentence.Split(' ');<br />
int count = words.Length;<br />

sardonicus24-Sep-04 2:49

sardonicus

24-Sep-04 2:49

thnx a lot man. but am sorry i got another question, this two lines of code counts the number of words only in case they got only one space character between each two words, what about if i got a sentence like this
"hello world" with 5 space characters for example and not "hello world" with one space character.
the program won't count the first sentence as two words i think.

exhaulted24-Sep-04 3:29

exhaulted

24-Sep-04 3:29

Check for the length of each instance in the array If it has 1 character or more it is a word.
Try something like the following

string[] words = sentence.Split(' ');<br />
count = 0;<br />
<br />
for (int x = 0; x < words.Length; x++)<br />
{<br />
if (words[x].Length > 0)<br />
count++;<br />
}

Kev

sardonicus24-Sep-04 4:05

sardonicus

24-Sep-04 4:05

thx a lot guys

Brian Delahunty24-Sep-04 3:30

Brian Delahunty

24-Sep-04 3:30

int count = Regex.Replace("Hello          World", @"\s+", " ").Trim(' ').Split(' ').Length;

That should work fine.. You can also have spaces at the front and the end of the string and it will still work.

e.g.

string testString = "       This    is     my Dog ";
int count = Regex.Replace(testString, @"\s+", " ").Trim(' ').Split(' ').Length;

Regards,
Brian Dela Smile | :)

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Minesweeper

Moon Boy24-Sep-04 2:03

Moon Boy

24-Sep-04 2:03

Well, i made a Minesweeper.
The Cells, are a class inherit from Label.
To display the images, i set the BackgroundImage.

But on the Expert mode ( 50x50 ) the game is extremely heavy and laggy Frown | :(

What can i do? Draw with DX? oO
Using components, doesnt work, its very heavy :\

Thanks.

Re: Minesweeper

Heath Stewart24-Sep-04 5:48

24-Sep-04 5:48

I've already answered your previous question: do not use controls (as you said, they're too heavy), but manage the drawing surface yourself. See my previous reply for more details.

This posting is provided "AS IS" with no warranties, and confers no rights.

Software Design Engineer
Developer Division Sustained Engineering
Microsoft

[My Articles]

Re: Minesweeper

Robert Rohde25-Sep-04 1:59

Robert Rohde

25-Sep-04 1:59

Override the OnPaint method of your main control and use gdi to draw your playing field.

Title size

Ajmoda24-Sep-04 1:20

Ajmoda

24-Sep-04 1:20

hello everybody

please help me in a problem. i want to increase the size of the title of my application is it possible if yes then please help me how?

thanx

Re: Title size

Heath Stewart24-Sep-04 6:11