C# Discussion Boards - CodeProject

Re: Changing size of Array at Runtime

nagendrathecoder7-Mar-09 1:34

nagendrathecoder

7-Mar-09 1:34

ok thanks, i'll try this. Smile | :)

Re: Changing size of Array at Runtime

Luc Pattyn7-Mar-09 1:42

Luc Pattyn

7-Mar-09 1:42

Hi,

In all .NET languages one-dimensional arrays can be resized, see the Array.Resize() method in the documentation. "This method allocates a new array with the specified size, copies elements from the old array to the new one, and then replaces the old array with the new one."

When you need to resize an array several times, or if you just don't know what size to choose at the start, you are probably better off choosing another kind of collection. The old ArrayList still exists, but it is better to use a generic list (that's List<T> ) which provides type checking and better performance. These collections grow and shrink dynamically without copying their content [ADDED] all the time (in the current implementation they grow by rounding up their capacity to the next power of 2 and copying only then).[/ADDED]

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

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modified on Sunday, June 12, 2011 9:13 AM

Re: Changing size of Array at Runtime

harold aptroot7-Mar-09 3:21

harold aptroot

7-Mar-09 3:21

Actually List<t> does copy all its elements when it needs to grow.
Go to System.Collections.Generic.List<t>.set_Capacity(int value) in for example Red Gate's .NET Reflector..

Re: Changing size of Array at Runtime

Luc Pattyn7-Mar-09 3:38

Luc Pattyn

7-Mar-09 3:38

Right. I keep forgetting that. Back to the home-made linked lists then. Laugh | :laugh:

Luc Pattyn [Forum Guidelines] [My Articles]

modified on Sunday, June 12, 2011 9:13 AM

How to save application settings in .net C# CF?

Aghosh Babu7-Mar-09 1:01

Aghosh Babu

7-Mar-09 1:01

i am developing a windows mobile C# application, how to save application settings? The user should be able to update these settings, but the settings want to be retrieved next time application starts. Do i need to use registry key? or xml config? any other good way to achevie this??

Re: How to save application settings in .net C# CF?

Natza Mitzi8-Mar-09 10:14

Natza Mitzi

8-Mar-09 10:14

Try and save the data to a path such as:
Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);

You can serialize your data in xml/binary format.
I prefer not to write to the registry, that is dirty.

Natza Mitzi

Re: How to save application settings in .net C# CF?

Aghosh Babu8-Mar-09 18:26

Aghosh Babu

8-Mar-09 18:26

i will be gratefull, if u can giv me some sample codes to refer to...

Re: How to save application settings in .net C# CF?

Natza Mitzi8-Mar-09 22:48

Natza Mitzi

8-Mar-09 22:48

I just tried to write the code discussed and is seems like there is no serialization mechanism. You need to write a mechanism and you can find one here:
http://www.codeproject.com/KB/mobile/SaveSettings.aspx[^]

Natza Mitzi

change date format using c#

Abdul Rahman Hamidy7-Mar-09 0:58

Abdul Rahman Hamidy

7-Mar-09 0:58

Dear All, I am looking to change the date format of my computer same as changing it from control panel using c#.
any info please?

Abdul Rahaman Hamidy
Database Developer
Kabul, Afghanistan

Re: change date format using c#

Xmen Real 7-Mar-09 4:18

Xmen Real

7-Mar-09 4:18

http://msdn.microsoft.com/en-us/library/zdtaw1bw.aspx[^]

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Rs0~53%eYrd8mt^7Z6]iTF+(EWfJ9zaK-iTV.C\y<pjxsg-b$f4ia>
--------------------------------------------------------
128 bit encrypted signature, crack if you can

Re: change date format using c#

Abdul Rahman Hamidy7-Mar-09 18:28

Abdul Rahman Hamidy

7-Mar-09 18:28

the article does not change the date setting as control panel.the article only changes date format to string in run time. what i want is to change the date format as i am changing from control panel.
this means i want to change computer date format from c# application and it should affect control panel too.

Abdul Rahaman Hamidy
Database Developer
Kabul, Afghanistan

Re: change date format using c# [modified]

Bishoy Rasmy17-Nov-09 23:25

Bishoy Rasmy

17-Nov-09 23:25

There is 2 ways to change your system date time in .Net
1st by changing the culture of the running thread

CultureInfo culture = (CultureInfo)CultureInfo.CurrentCulture.Clone(); 
            culture.DateTimeFormat.ShortDatePattern = "dd-MMM-yyyy"; 
            culture.DateTimeFormat.LongTimePattern = ""; 
            Thread.CurrentThread.CurrentCulture = culture;

2nd change the computer format

Structure SYSTEMTIME
Public wYear As Short 
Public wMonth As Short 
Public wDayOfWeek As Short 
Public wDay As Short 
Public wHour As Short 
Public wMinute As Short 
Public wSecond As Short 
Public wMilliseconds As Short
End Structure 
‘’’import the user32.dll (import the System.Runtime.InteropServices namespace):
'&lt;DllImport("kernel32.dll", setLastError:=True)&gt;
public shared function SetSystemTime(byref theDateTime as SYSTEMTIME) as Boolean 
End Function 
Dim newDateTime as SystemTime()newDateTime.wDay = valueHereif SetSystemTime(newDateTme) then   'cool, we set it successfullyend if

modified on Wednesday, November 18, 2009 5:32 AM

How to create a wrapper class in c#.net?

sreenivasaraok7-Mar-09 0:35

sreenivasaraok

7-Mar-09 0:35

HI,
I have customer class. i want to create the wrapper class fot this?

how to create wrapmper class for the customer?

What is wrapper class?

Re: How to create a wrapper class in c#.net?

Calin Tatar7-Mar-09 0:43

Calin Tatar

7-Mar-09 0:43

See Wrapper patern[^]

Also take a look at the following link for a sample[^]

Calin

Re: How to create a wrapper class in c#.net?

Christian Graus2-Jun-10 20:30

Christian Graus

2-Jun-10 20:30

Why would you want to add something, if you don't even know what the thing you want to add, actually is ?

Christian Graus

Driven to the arms of OSX by Vista.

Read my blog to find out how I've worked around bugs in Microsoft tools and frameworks.

How can I install a db schema while installing a program?

dejmjin6-Mar-09 22:59

dejmjin

6-Mar-09 22:59

Hi guys,

I am trying to make my setup project which is installing my program, install also the db schema I am using. I am using these technologies; vs2008 (c#) and sql server 2005.

I have already built a setup project and is installing the project, but without the db schema. Anyone can help me how to accomplish this please?

Thanks

dejmjin

Re: How can I install a db schema while installing a program?

Calin Tatar6-Mar-09 23:55

Calin Tatar

6-Mar-09 23:55

You have to add a custom action to your installer.

Have a look here[^].

Calin

Re: How can I install a db schema while installing a program?

dejmjin7-Mar-09 0:04

dejmjin

7-Mar-09 0:04

Thanks Calin...I will try this solutions. Seems good for my problem

Thanks again!

Convert a pdf file to picture format with hight quality

abbd6-Mar-09 22:57

abbd

6-Mar-09 22:57

Hello,

I convert a pdf file to picture using Imagemagick and ghostscript,but the quality was blur, please help me to resolve this grat problem, thank you verry mutch.

Re: Convert a pdf file to picture format with hight quality

Xmen Real 7-Mar-09 0:05

Xmen Real

7-Mar-09 0:05

well, better ask this in their forum... Smile | :)

collect data about visitors from BHO

Maverickcool6-Mar-09 22:24

Maverickcool

6-Mar-09 22:24

hi all
I have a BHO program which tracks visitors on websites
what is the best way to collect the data and send it to my database ? (cookies, AJAX, XML, other )

Re: collect data about visitors from BHO

ABitSmart6-Mar-09 23:57

ABitSmart

6-Mar-09 23:57

The question you have asked is a never ending argument of which is the best analytics solutions. Cookies, server logs, your own custom mechanism etc. etc. You need to do the research on what exactly best suites your need among the techniques. I use Google analytics. Someone could counter argue about its approach, but the fact is, it suits my needs. Hope I made sense.

(I have replied to your post because you seem to be posting this question every now and then)

Add folder with classes into solution

_c2h5oh_6-Mar-09 21:57

_c2h5oh_

6-Mar-09 21:57

Hello!
Do you know if it's possible to add to our solution ('solution explorer') whole directory with subdirectories that include necessary classes?

Re: Add folder with classes into solution

ABitSmart6-Mar-09 23:41

ABitSmart

6-Mar-09 23:41

You can add folders(and subfolders) to the Solution and also to the Project node. You should group your classes in the Project folder(sub folders)instead of the Solutions folder. Adding classes to the solution node won't make sense, as it would not be part of any assembly. I use the solutions folders to seperate out my code and test projects.

To add a folder, just right click on the node (Solution or Project) and in the "Add" menu there should be a New folder option.

Doubt, which to use

Sajjad Leo6-Mar-09 20:57

Sajjad Leo

6-Mar-09 20:57

Dear All,

i am using these three controls.
1- List Box
2- List View
3- Checked List

i want to show two columns like name column and id column which control is best and which property i must change to get result.

and when i do bind these three controls then their is errors. Please tell me which control is best for my task and how these will bind with dataset.

Thanks

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