C# Discussion Boards - CodeProject

Re: How to concatenate 2 nibbles in 1 byte?

Guffa3-Sep-05 2:10

Guffa

3-Sep-05 2:10

Multiply the most significant nibble by 16 and add them together.

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b { font-weight: normal; }

Re: How to concatenate 2 nibbles in 1 byte?

bouli3-Sep-05 2:11

bouli

3-Sep-05 2:11

hi guffa,

a code snippet maybe? thanks Smile | :)

There is no spoon.

Re: How to concatenate 2 nibbles in 1 byte?

leppie3-Sep-05 2:11

leppie

3-Sep-05 2:11

byte AddNibbles(byte a , byte b)
{
  return (a & 0xF) << 4 | (b & 0xF);
}

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Re: How to concatenate 2 nibbles in 1 byte?

bouli3-Sep-05 2:12

bouli

3-Sep-05 2:12

ah, just what I needed Smile | :)

Thanks

There is no spoon.

Re: How to concatenate 2 nibbles in 1 byte?

Anonymous3-Sep-05 2:13

Anonymous

3-Sep-05 2:13

Use the following code :

byte nib1,nib2,finalByte;

finalByte = (nib1 << 4) | (nib2 & 0x0f);

-Atul, Sky Software http://www.ssware.com
Shell MegaPack For ActiveX & .Net - Windows Explorer Like Shell UI Controls

Re: How to concatenate 2 nibbles in 1 byte?

bouli3-Sep-05 2:16

bouli

3-Sep-05 2:16

Thanks!

There is no spoon.

Need help! - accessing disposed object

Libor Tinka3-Sep-05 0:35

Libor Tinka

3-Sep-05 0:35

When I dispose Control calling Control.Dispose() method, deactivate window and then re-activate window, I get ObjectDisposedException.

Does anybody know how to avoid Windows.Forms creating handle of a disposed control?

Re: Need help! - accessing disposed object

if_mel_yes_else_no3-Sep-05 8:47

if_mel_yes_else_no

3-Sep-05 8:47

If I'm reading this right. You have a form with a control, and then in your code you dispose of the control? So when you try to activate the window it throws the exception about the disposed object? That's because your form thinks it still exists when you go to re-activate the window. Before you dispose the object, you should remove it from the form with form.controls.remove(yourControl). Then you can dispose of the object all you want.

Re: Need help! - accessing disposed object

Libor Tinka3-Sep-05 9:06

Libor Tinka

3-Sep-05 9:06

When I use Controls.Remove(Control), the form start to working weird. It seems to be inactive (light blue) and blinking when clicked, but still keeping inactive.

I also tried to use SuspendLayout() and ResumeLayout() methods. Nothing changed.

And when all things worked (I had to remove more controls), Windows.Forms already tried to access correctly REMOVED and DISPOSED object calling its CreateHandle() method.

The last thing I've done was to change design of my app. I have no more time to solve these bugs, maybe later.

Thanks for answer!

How Can I Use Visual Studio Code Editor?

2-Sep-05 22:45

Hi Every Body

I want to use Visual Studio.Net Code Editor in my Winform Application to make a script editor. Is it possible to use Visual Studio.Net Code editor.

I need text highlighting and auto expression completion in my script editor.

Thank you for your help.

Re: How Can I Use Visual Studio Code Editor?

leppie3-Sep-05 2:13

leppie

3-Sep-05 2:13

No, I very much doubt that, maybe you could host the whole VS.NET process in a form, but thats about it.

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How to Develope Independent Clock

Suseel kumar P2-Sep-05 21:42

Suseel kumar P

2-Sep-05 21:42

I would like to develop a Clock Application. It should not depend upon the System clock. That is when the System time changes the clock tmie should not change. The clock should run independantly. Please give me the code or Logic. Thanking You
Suseel Kumar P

-- modified at 3:44 Saturday 3rd September, 2005

Re: How to Develope Independent Clock

Libor Tinka3-Sep-05 0:14

Libor Tinka

3-Sep-05 0:14

You can use System time as well. Only difference between system and your time could be a shift.

Look at the DateTime structure at MSDN or somewhere else. Your can set your clock to any time you want, then compute a shift between your time and system time. Everywhen you want to update your time, just compute: system time + difference. It's not extremely accurate (in the mean of milliseconds), but it may be enough for your application.

System.Type --> Instance

peterchen2-Sep-05 21:42

peterchen

2-Sep-05 21:42

having the typeof(something), can I create a new (default constructed) instance from that?

Pandoras Gift #44: Hope. The one that keeps you on suffering.
aber.. "Wie gesagt, der Scheiss is' Therapie"
boost your code || Fold With Us! || sighist | doxygen

Re: System.Type --> Instance

Anonymous3-Sep-05 2:15

Anonymous

3-Sep-05 2:15

Yes, see the Activator.CreateInstance method.

-Atul, Sky Software http://www.ssware.com
Shell MegaPack For ActiveX & .Net - Windows Explorer Like Shell UI Controls

Re: System.Type --> Instance

Anonymous3-Sep-05 2:15

Anonymous

3-Sep-05 2:15

Yes, use the Activator.CreateInstance method.

-Atul, Sky Software http://www.ssware.com
Shell MegaPack For ActiveX & .Net - Windows Explorer Like Shell UI Controls

Re: System.Type --> Instance

leppie3-Sep-05 2:16

leppie

3-Sep-05 2:16

Activator.CreateInstance()

And then start looking at reflection Big Grin | :-D

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can anyone convert this to C#

Mridang Agarwalla2-Sep-05 21:41

Mridang Agarwalla

2-Sep-05 21:41

00001 /*  $Revision: 1.2 $<br />
00002 **<br />
00003 **  Do shell-style pattern matching for ?, \, [], and * characters.<br />
00004 **  Might not be robust in face of malformed patterns; e.g., "foo[a-"<br />
00005 **  could cause a segmentation violation.  It is 8bit clean.<br />
00006 **<br />
00007 **  Written by Rich $alz, mirror!rs, Wed Nov 26 19:03:17 EST 1986.<br />
00008 **  Rich $alz is now <rsalz@osf.org>.<br />
00009 **  April, 1991:  Replaced mutually-recursive calls with in-line code<br />
00010 **  for the star character.<br />
00011 **<br />
00012 **  Special thanks to Lars Mathiesen <thorinn@diku.dk> for the ABORT code.<br />
00013 **  This can greatly speed up failing wildcard patterns.  For example:<br />
00014 **      pattern: -*-*-*-*-*-*-12-*-*-*-m-*-*-*<br />
00015 **      text 1:  -adobe-courier-bold-o-normal--12-120-75-75-m-70-iso8859-1<br />
00016 **      text 2:  -adobe-courier-bold-o-normal--12-120-75-75-X-70-iso8859-1<br />
00017 **  Text 1 matches with 51 calls, while text 2 fails with 54 calls.  Without<br />
00018 **  the ABORT code, it takes 22310 calls to fail.  Ugh.  The following<br />
00019 **  explanation is from Lars:<br />
00020 **  The precondition that must be fulfilled is that DoMatch will consume<br />
00021 **  at least one character in text.  This is true if *p is neither '*' nor<br />
00022 **  '\0'.)  The last return has ABORT instead of FALSE to avoid quadratic<br />
00023 **  behaviour in cases like pattern "*a*b*c*d" with text "abcxxxxx".  With<br />
00024 **  FALSE, each star-loop has to run to the end of the text; with ABORT<br />
00025 **  only the last one does.<br />
00026 **<br />
00027 **  Once the control of one instance of DoMatch enters the star-loop, that<br />
00028 **  instance will return either TRUE or ABORT, and any calling instance<br />
00029 **  will therefore return immediately after (without calling recursively<br />
00030 **  again).  In effect, only one star-loop is ever active.  It would be<br />
00031 **  possible to modify the code to maintain this context explicitly,<br />
00032 **  eliminating all recursive calls at the cost of some complication and<br />
00033 **  loss of clarity (and the ABORT stuff seems to be unclear enough by<br />
00034 **  itself).  I think it would be unwise to try to get this into a<br />
00035 **  released version unless you have a good test data base to try it out<br />
00036 **  on.<br />
00037 */<br />
00038 #include <stdio.h><br />
00039 #include <sys/types.h><br />
00040 //#include "configdata.h"<br />
00041 //#include "clibrary.h"<br />
00042 #include "wildmat.h"<br />
00043 <br />
00044 <br />
00045 #define TRUE                    1<br />
00046 #define FALSE                   0<br />
00047 #define ABORT                   -1<br />
00048 <br />
00049 <br />
00050     /* What character marks an inverted character class? */<br />
00051 #define NEGATE_CLASS            '^'<br />
00052     /* Is "*" a common pattern? */<br />
00053 #define OPTIMIZE_JUST_STAR<br />
00054     /* Do tar(1) matching rules, which ignore a trailing slash? */<br />
00055 #undef MATCH_TAR_PATTERN<br />
00056 <br />
00057 <br />
00058 /*<br />
00059 **  Match text and p, return TRUE, FALSE, or ABORT.<br />
00060 */<br />
00061 static int DoMatch(text, p)<br />
00062 register char *text;<br />
00063 register char *p;<br />
00064 {<br />
00065         register int last;<br />
00066         register int matched;<br />
00067         register int reverse;<br />
00068 <br />
00069         for (; *p; text++, p++) {<br />
00070                 if (*text == '\0' && *p != '*')<br />
00071                         return ABORT;<br />
00072                 switch (*p) {<br />
00073                 case '\\':<br />
00074                         /* Literal match with following character. */<br />
00075                         p++;<br />
00076                         /* FALLTHROUGH */<br />
00077                 default:<br />
00078                         if (*text != *p)<br />
00079                                 return FALSE;<br />
00080                         continue;<br />
00081                 case '?':<br />
00082                         /* Match anything. */<br />
00083                         continue;<br />
00084                 case '*':<br />
00085                         while (*++p == '*')<br />
00086                                 /* Consecutive stars act just like one. */<br />
00087                                 continue;<br />
00088                         if (*p == '\0')<br />
00089                                 /* Trailing star matches everything. */<br />
00090                                 return TRUE;<br />
00091                         while (*text)<br />
00092                                 if ((matched =<br />
00093                                      DoMatch(text++, p)) != FALSE)<br />
00094                                         return matched;<br />
00095                         return ABORT;<br />
00096                 case '[':<br />
00097                         reverse = p[1] == NEGATE_CLASS ? TRUE : FALSE;<br />
00098                         if (reverse)<br />
00099                                 /* Inverted character class. */<br />
00100                                 p++;<br />
00101                         matched = FALSE;<br />
00102                         if (p[1] == ']' || p[1] == '-')<br />
00103                                 if (*++p == *text)<br />
00104                                         matched = TRUE;<br />
00105                         for (last = *p; *++p && *p != ']'; last = *p)<br />
00106                                 /* This next line requires a good C compiler. */<br />
00107                                 if (*p == '-' && p[1] != ']'<br />
00108                                     ? *text <= *++p<br />
00109                                     && *text >= last : *text == *p)<br />
00110                                         matched = TRUE;<br />
00111                         if (matched == reverse)<br />
00112                                 return FALSE;<br />
00113                         continue;<br />
00114                 }<br />
00115         }<br />
00116 <br />
00117 #ifdef  MATCH_TAR_PATTERN<br />
00118         if (*text == '/')<br />
00119                 return TRUE;<br />
00120 #endif                          /* MATCH_TAR_ATTERN */<br />
00121         return *text == '\0';<br />
00122 }<br />
00123 <br />
00124 <br />
00125 /*<br />
00126 **  User-level routine.  Returns TRUE or FALSE.<br />
00127 */<br />
00128 int wildmat(const char *text, const char *p)<br />
00129 {<br />
00130 #ifdef  OPTIMIZE_JUST_STAR<br />
00131         if (p[0] == '*' && p[1] == '\0')<br />
00132                 return TRUE;<br />
00133 #endif                          /* OPTIMIZE_JUST_STAR */<br />
00134         return DoMatch(text, p) == TRUE;<br />
00135 }<br />
00136 <br />
00137 <br />
00138 <br />
00139 #if     defined(TEST)<br />
00140 <br />
00141 /* Yes, we use gets not fgets.  Sue me. */<br />
00142 extern char *gets();<br />
00143 <br />
00144 <br />
00145 int main()<br />
00146 {<br />
00147         char p[80];<br />
00148         char text[80];<br />
00149 <br />
00150         printf("Wildmat tester.  Enter pattern, then strings to test.\n");<br />
00151         printf<br />
00152             ("A blank line gets prompts for a new pattern; a blank pattern\n");<br />
00153         printf("exits the program.\n");<br />
00154 <br />
00155         for (;;) {<br />
00156                 printf("\nEnter pattern:  ");<br />
00157                 (void) fflush(stdout);<br />
00158                 if (gets(p) == NULL || p[0] == '\0')<br />
00159                         break;<br />
00160                 for (;;) {<br />
00161                         printf("Enter text:  ");<br />
00162                         (void) fflush(stdout);<br />
00163                         if (gets(text) == NULL)<br />
00164                                 exit(0);<br />
00165                         if (text[0] == '\0')<br />
00166                                 /* Blank line; go back and get a new pattern. */<br />
00167                                 break;<br />
00168                         printf("      %s\n",<br />
00169                                wildmat(text, p) ? "YES" : "NO");<br />
00170                 }<br />
00171         }<br />
00172 <br />
00173         exit(0);<br />
00174         /* NOTREACHED */<br />
00175 }<br />
00176 #endif                          /* defined(TEST) */<br />
<br />

Re: can anyone convert this to C#

leppie3-Sep-05 2:23

leppie

3-Sep-05 2:23

Mridang Agarwal wrote:
#include "wildmat.h"

AFAIK wildmat is a regular expression library. Look at Regex in .NET to do something similar.

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how to control datetimepicker control manuaaly

ravimohan162-Sep-05 18:41

ravimohan16

2-Sep-05 18:41

hi this is ravi, i need code for setting our own timimgs in datetimepicker control rather than automatic.
regard ravi

exporting dataset to excel

Member 22115382-Sep-05 18:28

Member 2211538

2-Sep-05 18:28

hi!
I have to convert sqlserver database(table) to an excel file.I tried some code samples available.In some code samples,excel is used as namespace i.e. using excel is mentioned.but I am not able to compile it.please help me if you have any code to convert sql server tables to excel.

Thanking you ,
with regards,
srikanth.

mvssrikanth

exporting dataset to excel

Member 22115382-Sep-05 18:25

Member 2211538

2-Sep-05 18:25

How to create Graphics g? Event Fires

...---...2-Sep-05 14:31

...---...

2-Sep-05 14:31

How do I declare a "Graphics g" inside this event handler?
Graphics g = new Graphics(); //DOESN'T WORK...

private void complexA_OK_Click(object sender, System.EventArgs e)
{
//Want to instantiate a Graphics object here....
}

thanks -- sorry, I know it's a stupid question....if you just want to tell me how dumb I am don't bother responding...

Re: How to create Graphics g? Event Fires

Mohamad Al Husseiny2-Sep-05 14:41

Mohamad Al Husseiny

2-Sep-05 14:41

Write somthing like Graphics g=this.CreateGraphics(); this will get graphics object from the form the event handler belong
if you for example you want to draw in Picture box write
Graphics g=pictureBox1.CreateGraphics();
if you want to Draw on the image to get graphic write

Bitmap bm=new Bitmap(x,y);
Graphics g= Graphics.FromImage(bm);

MCAD

-- modified at 20:42 Friday 2nd September, 2005

Re: How to create Graphics g? Event Fires

...---...2-Sep-05 15:01

...---...

2-Sep-05 15:01

thanks Mohammed, I will try it...

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