C# Discussion Boards - CodeProject

Sasuko30-Jul-05 3:25

30-Jul-05 3:25

i need before to show my application create some object that is i need to set
// declarations
...
// this panel is showed in the form
private System.Windows.Forms.Panel panel1;
// this is just a needed-in-memory panel
private Panel myobject = new Panel();
...

private void InitializeComponent(){
this.panel1 = new System.Windows.Forms.Panel();
}

// now i have
private Any_Inithialize_Function(){
myobject = panel1;
}

if i do it in Main, onLoad, onPaint funtion (as Any_Inithialize_Function) i get memory error becouse panel1 is not yet created.

Re: Inithialize objects and variables

S. Senthil Kumar30-Jul-05 3:41

S. Senthil Kumar

30-Jul-05 3:41

Assigning it right after InitializeComponent (in the Form's constructor) should work fine.

Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro

Re: Inithialize objects and variables

Sasuko30-Jul-05 4:50

Sasuko

30-Jul-05 4:50

if you mean write that line inside InitializeComponent it is deleted when i run the debug.
So it doesn't work.

Re: Inithialize objects and variables

Robert Rohde30-Jul-05 8:10

Robert Rohde

30-Jul-05 8:10

I think he meant you should put your call right after the call to InitializeComponent inside the constructor.

Toolbar Image

Kamrul Hasan30-Jul-05 3:12

Kamrul Hasan

30-Jul-05 3:12

I tried using the toolbar of VS.NET. And found that, it does not show the alpha region of the icons perfectly. I have tried using maximum color depth in the imagelist that was associated with the toolbar, and also tried using PNG images.
Nither of my approaches succeded Frown | :(

Is there any way to show the icons perfectly ??

thanks in advance.

Re: Toolbar Image

Sasuko30-Jul-05 3:31

Sasuko

30-Jul-05 3:31

are your png real 32bit files?
Sometime (it is a visual studio bug) it doesn't work, you have to delete all these image from the imagelist and reload them all in the same time.
Other bug become if you use not good png images. That is you have to make much attention at antialising your image when you draw it in your graphic program, i advice you to don't use much antialising.
Make me to know.

Re: Toolbar Image

Kamrul Hasan30-Jul-05 4:11

Kamrul Hasan

30-Jul-05 4:11

I am using 32bit PNGs. and also tried reloading the images but that did not work Frown | :(

Re: Toolbar Image

Sasuko30-Jul-05 4:51

Sasuko

30-Jul-05 4:51

so try to redraw these images using not strong antialising

Re: Toolbar Image

Luis Alonso Ramos30-Jul-05 7:55

Luis Alonso Ramos

30-Jul-05 7:55

See this article:

http://www.codeproject.com/cs/miscctrl/AlphaImageImagelist.asp[^]

-- LuisR

Luis Alonso Ramos
Intelectix - Chihuahua, Mexico

Not much here: My CP Blog!

Class question

nc3b30-Jul-05 0:02

nc3b

30-Jul-05 0:02

I have a dum guestion... how do i declare an array of clases, an array in wich every element is a class i tried
class SomeClass
{
public int x;
public int y;
};

SomeClass[] a=new SomeClass[5];
everything goes ok.
when i run the prorgam and i try smth like :
a[3]=4; the program throws an exception.. pls help me..

Re: Class question

User 665830-Jul-05 0:11

User 6658

30-Jul-05 0:11

For each class in SomeClass[] you need to do a SomeClass[i] = new SomeClass(constructor)

Then you can access the values like: SomeClass[3].x = value;

modified 12-Sep-18 21:01pm.

Re: Class question

nc3b30-Jul-05 0:14

nc3b

30-Jul-05 0:14

Ok.. pls show me how to make such a constructor.. thx Smile | :)

Re: Class question

User 665830-Jul-05 0:26

User 6658

30-Jul-05 0:26

If you don't need one, then just don't declare it.

A simple SomeClass[i] = new SomeClass(); will be enough then.

modified 12-Sep-18 21:01pm.

Re: Class question

nc3b30-Jul-05 1:06

nc3b

30-Jul-05 1:06

Hey, thx

KeycodeV2.dll ?- Error

Virendrak29-Jul-05 23:13

Virendrak

29-Jul-05 23:13

when i build a window application using crystal report
the application run well on the perticular system where it is build but
if i use to run this application on another system in which there is only Dot Net Framework 1.1
its gives an error " KeycodeV2.dll "
plz give me solution

help me its urgent

Viren
D'Oh! | :doh:

Never Think That You Have Failed Instead Always Think That u hav Better Chance Next Time...

Re: KeycodeV2.dll ?- Error

Michael P Butler30-Jul-05 1:52

Michael P Butler

30-Jul-05 1:52

Is Crystal Reports installed on the other machine?

The KeyCode dll is used for the Crystal Reports licencing check. I usually create an MSI that uses the Crystal Reports merge modules and set the key-code property to the licence key. I then install this onto the destination machine along with my app.

How you install the runtime depends on if you are using the version of CR that comes with Visual Studio or a full version.

See here[^] or this pdf[^] or visit the Crystal website[^]

Michael

CP Blog [^] Development Blog [^]

Using API RegQueryValueEx with DllImport to read data from Registry

rahul_iacsd29-Jul-05 19:41

rahul_iacsd

29-Jul-05 19:41

Hello,

I'm trying to read registry value using the API functions RegOpenKeyEx and RegQueryValueEx along with DllImport in C#(I'm aware of C# inbuilt registry access but I need to do it in this way). The results show that code runs fine but I'm not getting the desired data. Its returns 0 instead of the data. I'm including the code that I'm using

//*** declarations in the class *****

public static readonly UIntPtr HkeyLocalMachine = (UIntPtr)0x80000002;<br />
<br />
public const string lpSubKey = "HARDWARE\\DESCRIPTION\\System\\CentralProcessor\\0";<br />
<br />
public const int KEY_QUERY_VALUE = 0x1;<br />
public const int REZ_SZ =0x00000002;<br />
<br />
[DllImport("advapi32.dll",EntryPoint="RegOpenKeyEx")]<br />
public static extern int RegOpenKeyEx_DllImport(UIntPtr hKey,string lpSubKey,uint ulOptions,int samDesired,out IntPtr phkResult);<br />
<br />
[DllImport("advapi32.dll",EntryPoint="RegQueryValueEx")]<br />
public static extern int RegQueryValueEx_DllImport(IntPtr hKey,string lpValueName,int lpReserved,out uint lpType, IntPtr lpData,out uint lpcbData);<br />
<br />
//****** declared on load or click event ****<br />
<br />
IntPtr hKeyVal;<br />
uint lpType;<br />
uint lpcbData;<br />
IntPtr q=new IntPtr();<br />
<br />
int valueRet=RegOpenKeyEx_DllImport(HkeyLocalMachine,lpSubKey,0,KEY_QUERY_VALUE,out hKeyVal);<br />
<br />
valueRet=RegQueryValueEx_DllImport(hKeyVal,"ProcessorNameString",0,out lpType, q,out lpcbData);

Output when viewd using different variables :

lpType= returns 1 which signify a string value
q returns 0 *** this should return data but does not
lpcbData returns 48 signifying size of the data being returned.
The return values of the functions show 0 which means success

Any help or insight on "Why I'm unable to get the data" would be highly appreciated.

Thanks
Rahul Sharma

Re: Using API RegQueryValueEx with DllImport to read data from Registry

rahul_iacsd31-Jul-05 19:14

rahul_iacsd

31-Jul-05 19:14

Is there no one who can help me out with this code!!!!!!

Re: Using API RegQueryValueEx with DllImport to read data from Registry

najmu24-Sep-09 7:53

najmu

24-Sep-09 7:53

use instead..

RegQueryValueEx( _
ByVal hKey As IntPtr, _
ByVal lpValueName As String, _
ByVal lpReserved As Integer, _
ByRef lpType As Integer, _
ByVal lpData As System.Text.StringBuilder, _
ByRef lpcbData As Integer) As Integer

in DLLImport change it to StringBuilder and then retrive value out of it...

code sample:
[DllImport("advapi32.dll", EntryPoint = "RegQueryValueEx")]
public static extern int RegQueryValueExA(int hKey, string lpValueName, int lpReserved, ref uint lpType, System.Text.StringBuilder lpData, ref uint lpcbData);

uint lpType= 0;
uint lpcbData = 1024;
string keyValue = null;
StringBuilder keyBuffer = new StringBuilder(1024);
RegQueryValueExA (hSubkey, "Description", 0, ref lpType, keyBuffer, ref lpcbData);

keyValue = keyBuffer.ToString();

thread pool

ppp00129-Jul-05 19:19

ppp001

29-Jul-05 19:19

Hi,

Is ThreadPool in .NET have work for window 2000 or above machine ?

And why there are no maximum threads setting in the ThreadPool class ?

Thanks

Re: thread pool

S. Senthil Kumar29-Jul-05 21:02

S. Senthil Kumar

29-Jul-05 21:02

ThreadPool will work on any platform supported by .NET and that includes Win 2K. As to why there is no max setting in ThreadPool class, I don't know, but IIRC, it's set to 25 by default.

Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro

Re: thread pool

ppp00131-Jul-05 15:45

ppp001

31-Jul-05 15:45

Thanks for your reply.

But Win98 also support .NET if install the .NET runtime on it.
So will win98 support threadPool also ?

And what will happen for the machine if the maximum threads no setting
is reached or beyond ?

Thanks

Re: thread pool

S. Senthil Kumar31-Jul-05 19:31

S. Senthil Kumar

31-Jul-05 19:31

Yes, it should run fine on Win98 also.

The threadpool limit is per process, not per machine. If your process reaches the max number of threads, further requests to the threadpool will block until atleast one thread is released from the pool.

Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro

Installtion Problem

ksanju100029-Jul-05 18:14

ksanju1000

29-Jul-05 18:14

Hi I have made setup installation using Set and Delpyment I am using Visual Studio 2003.
Suppose i have opened the my Product and word and internet explorer when i press ALT + TAB , there shows the windows Picture in my product. I want to change that picture
How can i change my product picture when i press ALT + TAB .
Is there any properties when i make the installation .
This is my desktop application . I have made set up of desktop application.
When i press ALT + TAB I can see windows picture of my product I want to change that picture
is there any option to change the picture when i press ALT +TAB
Some has given some help---
If you press ALT+TAB the icon showing is your installation exe 's icon. So you should change setupiconfile while creating setup program. This facility is available in all major setup program creation applications like innosetup, Install Sheild etc. Check this facility is available in the deployment tool in visual studio. --- I tried to set exe file ' icon still i am getting the picture of Windows when i proess the ALT + TAB
pls Help me its very urgent
Thanks

dataSet Problem

ksanju100029-Jul-05 18:09

ksanju1000

29-Jul-05 18:09

Hi,
I am connecting my Winform with MySql 3.27 i c#
I am connected through MySql Connector 1.0.
In mY database of mysql Table has Datetime column
example --
values of datetime column comes in that way

2005-04-11 17:21:33

DateTime column has some corrupted format 0000-00-00 00:00:00 or 2005-00-00 00:00:00
when i store it in dataset it can store only correct format of datetime if it gets corrupted format
it throws exception
My client wants to bypass the corrupted datetime format.
how can i store correct and corrupted datetime format in dataset
Is there any way to set default value to the datetime feild of the dataset
pls provie me code for that

any clue
thanks

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