C# Discussion Boards - CodeProject

altafmohd14-Mar-12 8:42

14-Mar-12 8:42

sir i want to provide path through " open file dialog box "
...how can i get the path where i want to save my backup file using this dialog box ...plz help thanx in advance .

Re: backup mysql database using c#

Wayne Gaylard14-Mar-12 20:07

Wayne Gaylard

14-Mar-12 20:07

Use a FolderBrowserDialog[^].

When I was a coder, we worked on algorithms. Today, we memorize APIs for countless libraries — those libraries have the algorithms - Eric Allman

modified 15-Mar-12 2:25am.

Re: backup mysql database using c#

altafmohd14-Mar-12 21:01

altafmohd

14-Mar-12 21:01

thank you

Re: backup mysql database using c#

Abhinav S13-Mar-12 20:00

Abhinav S

13-Mar-12 20:00

Try after adding mysqldump to environment variables (along with the path to it).

Re: backup mysql database using c#

altafmohd13-Mar-12 21:43

altafmohd

13-Mar-12 21:43

thank u sir ho gya Smile | :)

Re: backup mysql database using c#

Abhinav S13-Mar-12 23:47

Abhinav S

13-Mar-12 23:47

altafmohd wrote:
ho gya

Just for the benefit of the English community, this means "Its done".

You might want to post in the GIT[^] if you want to use Hindi as your means to ask questions.
Also, always vote if it helps.

Re: backup mysql database using c#

altafmohd14-Mar-12 0:00

altafmohd

14-Mar-12 0:00

ok sir ....and thank you Smile | :)

Re: backup mysql database using c#

altafmohd14-Mar-12 19:04

altafmohd

14-Mar-12 19:04

SQL

sir i want to provide path through " open file dialog box "
...how can i get the path where i want to save my backup file using this dialog box ...plz help thanx in advance

Re: backup mysql database using c#

PIEBALDconsult14-Mar-12 5:26

PIEBALDconsult

14-Mar-12 5:26

No idea, but this:

DateTime Time = DateTime.Now;
int year = Time.Year;
int month = Time.Month;
int day = Time.Day;
int hour = Time.Hour;
int minute = Time.Minute;
int second = Time.Second;
int millisecond = Time.Millisecond;
 
//Save file to C:\ with the current date as a filename
string path;
path = "C:\\MySqlBackup" + year + "-" + month + "-" + day +
"-" + hour + "-" + minute + "-" + second + "-" + millisecond + ".sql";

can be reduced to:

string path = System.String.Format ( @"C:\MySqlBackup{0:yyyy-MM-dd-HH-mm-ss-fff}.sql" , System.DateTime.Now ) ;

Delphi to C#

firepile13-Mar-12 11:02

firepile

13-Mar-12 11:02

I need to implement the simple encryption function below in C#. Anyone that knows Delphi and C# able to help?

function EncryptStr(const S: String; Key: Word): String;
var
  I: Integer;
const
  C1 = 53761;
  C2 = 32618;
begin
  Result := S;
  for I := 1 to Length(S) do begin
    Result[I] := char(byte(S[I]) xor (Key shr 8));
    Key := (byte(Result[I]) + Key) * C1 + C2;
  end;
end;

Re: Delphi to C#

Philippe Mori13-Mar-12 16:17

Philippe Mori

13-Mar-12 16:17

In C# characters are 2 bytes wide so probably want to first convert the string into an array of bytes. At that step, you have to choose which encoding you want to use. Once you have such an array, you can then apply the above algorithm on it. But be aware that the resulting array of bytes might not be valid for the selected encoding and thus it might be somewhat problematic to return a string. Also because of encoding, the final length might also be different. So you have to know exactly what you want to do and if you want to properly support any valid string or only those that are limited to the ANSI character set.

Philippe Mori

Re: Delphi to C#

BobJanova13-Mar-12 23:42

BobJanova

13-Mar-12 23:42

Not true. Characters are only two bytes wide if you use UTF16 encoding (and I've never seen anyone do so). In UTF8, some characters are 1, some are 2 and some are more. You can also force it to read bytes as ANSI characters using Encoding.Default.

I agree though that in .Net it's better to do algorithms like this on byte arrays not character ones, if possible.

Re: Delphi to C#

lmoelleb14-Mar-12 0:13

lmoelleb

14-Mar-12 0:13

Sorry, but Philippe is right.

.NET always use UTF-16 encodings for strings. And as he correctly mentions you can select the encoding to use when converting to/from a byte array. You can not select encoding to use in a string.

Re: Delphi to C#

BobJanova14-Mar-12 2:11

BobJanova

14-Mar-12 2:11

I'm not sure that's actually true either (you can put Unicode code page 2, i.e. UTF32, characters in a .Net string, right?). But since you can never get at the internal representation of a string anyway, it's irrelevant ... the only time byte count matters is when you convert a string to bytes (or vice versa), and the default for that is definitely UTF8. How the string is actually stored internally is implementation dependent and probably depends on what's actually in the string.

Re: Delphi to C#

lmoelleb14-Mar-12 3:16

lmoelleb

14-Mar-12 3:16

UTF-32 is just again another encoding of the Unicode characterset. It does not contain any character that can't be represented by UTF7, UTF-8, or UTF-16. But unlike these encodings UTF-32 has a fixed length of all characters (4 bytes) where for example UTF-16 use two or four bytes per character.

I seriously doubt the encoding of the string used for the in memory representation of the string depends on what is in it. If an implementation stored anything else than UTF-16, it would have to reencode every time you indexed a character in the string (including doing substrings, regex, etc). Sure it is possible, but it would be a lot of complexity added for no reasonable gain.

Re: Delphi to C#

Philippe Mori14-Mar-12 2:37

Philippe Mori

14-Mar-12 2:37

In C#, all characters are in Unicode.

Philippe Mori

Re: Delphi to C#

Pete O'Hanlon14-Mar-12 2:49

Pete O'Hanlon

14-Mar-12 2:49

You know, that was what Ridley Scott was going to run with before he went with "In space no one can hear you scream"?

*pre-emptive celebratory nipple tassle jiggle* - Sean Ewington

"Mind bleach! Send me mind bleach!" - Nagy Vilmos

My blog | My articles | MoXAML PowerToys | Mole 2010 - debugging made easier - my favourite utility

Re: Delphi to C#

BobJanova13-Mar-12 23:45

BobJanova

13-Mar-12 23:45

Honestly, this is pretty trivial. If you don't know Delphi, how do you know this function does what you want? And if you don't know C# well enough to translate it, why are you writing a C# app?

The only subtlety is that the algorithm is working on bytes, so you should use a byte[] not a string, and the resulting byte stream might well not be translatable to a UTF8 string at all.

C# string need to search for a lack of < & >

glennPattonWork313-Mar-12 5:04

glennPattonWork3

13-Mar-12 5:04

Hi All,
Question I have a string of Data that I am going to split with the method :

string[] Values = FileData.Split(delimeterCharFurther);

delimeterCharFurther are

char[] delimeterCharFurther = { '<', '>' };

I need to check the string before I split it that all the valid data is surrounded by < and >. I was thinking of a variable

for (int a = 0; a <= FileData.Length; a++)
 {
     Location = FileData.IndexOf("><");
     MessageBox.Show(Location.ToString());
     
 }

but if I'm right that will only find the first, one way to do it I'm guessing is to search for a > without a following

Re: C# string need to search for a lack of

Luc Pattyn13-Mar-12 5:42

Luc Pattyn

13-Mar-12 5:42

IndexOf is overloaded, therefore location=string.IndexOf(subString, location+1); if often used in a loop for such purposes.

Smile | :)

Luc Pattyn [My Articles] Nil Volentibus Arduum

Re: C# string need to search for a lack of

DonDiegoDeLaVega13-Mar-12 5:43

DonDiegoDeLaVega

13-Mar-12 5:43

Hi Glenn,

Not sure what 'valid' means : what about "<a<b>>" ?? you should get "a","b"

If so 'split' is probably not the path to the solution.

But if not (i.e. <a<b>> is invalid )
why not

string[] Values = FileData.Split('<');

first

then check values that are ending with a '>'

Regards

Re: C# string need to search for a lack of

glennPattonWork313-Mar-12 6:04

glennPattonWork3

13-Mar-12 6:04

Thanks for that, I think 'valid' was my typing as thinking the data is (should be) enclosed in < & > but in transmission some times it shows up as Data not (or even D!"" random ASCII) if it does throw 'em away and carry on. My think was along the lines of declare an int pointer increment over the string, then I remembered it was Windows and C#, not DOS & Turbo C!!
Glenn

Re: C# string need to search for a lack of

PIEBALDconsult13-Mar-12 7:06

PIEBALDconsult

13-Mar-12 7:06

Or use a Regular Expression:

@"<(?'Data'[^>]*?>"

Send Email

om_metab13-Mar-12 4:06

om_metab

13-Mar-12 4:06

Hellow every body I can't send mesg by asp.net coz this exception accore the operation time out Cry | :((

Re: Send Email

Pete O'Hanlon13-Mar-12 4:57

Pete O'Hanlon

13-Mar-12 4:57

A couple of points.

1. Without showing us any code whatsoever, we couldn't even begin to guess where it's going wrong.
2. What do you mean by accore? I appreciate English isn't your first language, but I'm not sure what word that's meant to be.

*pre-emptive celebratory nipple tassle jiggle* - Sean Ewington

"Mind bleach! Send me mind bleach!" - Nagy Vilmos

My blog | My articles | MoXAML PowerToys | Mole 2010 - debugging made easier - my favourite utility

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