C# Discussion Boards - CodeProject

kokain3-Jun-03 6:27

3-Jun-03 6:27

.NET Framework must be 1.1, I could connect to oracle with OleDb for other action like execute sql command, get data reader,...

but got above problem with combo box.

Re: problem with combo box !!!

James T. Johnson3-Jun-03 10:55

James T. Johnson

3-Jun-03 10:55

Can you describe the problem you are seeing?

I don't see anything wrong with the code you wrote above so long as you have a variable named DataSet with at least one DataTable added.

James

"I despise the city and much prefer being where a traffic jam means a line-up at McDonald's"
Me when telling a friend why I wouldn't want to live with him

Re: problem with combo box !!!

Anonymous6-Jun-03 4:25

Anonymous

6-Jun-03 4:25

hi, thanks for your reply.

it's now ok, and I really don't know what the reason is.

thanks again.

ApplyFont in Cristal Report

Givi78394763543-Jun-03 2:56

Givi7839476354

3-Jun-03 2:56

Can anybody help me. I really do not understand one thing!
This is an example from MSDN:
//***********************
private void SetFont(string reportObjectName)
{
TextObject text;
FontDialog fieldFont = new FontDialog();

// Get the ReportObject by name and cast it as a TextObject.
text = Report.ReportDefinition.ReportObjects[reportObjectName]
as TextObject;
if (text!= null)
{
// Show the Font dialog.
if (fieldFont.ShowDialog ()==DialogResult.OK)
{
// Apply the settings from the Font dialog.
text.ApplyFont(fieldFont.Font);
// Set the text object's color to blue.
text.Color = Color.Blue;
}
}
}
//***********************
but in reality the function ApplyFont works not properly, it can change anythign but Font.Size.
The main thing of font is its Size and I cannot change it in my reports. What's going on? Is it an error or it works as designed?

Thank you!!!

ALT Key

Valeria Bogdevich3-Jun-03 2:22

Valeria Bogdevich

3-Jun-03 2:22

How to know that ALT pressed if control doesn't have an imput focus?

Valeria

Re: ALT Key

Vasudevan Deepak Kumar3-Jun-03 5:00

Vasudevan Deepak Kumar

3-Jun-03 5:00

Hi Valeria,

In ASP.NET (Web Development)

you can use this codesnippet to detect ALT key bieng pressed:

HTML

document.onkeydown = function ()
{
     alert (event.altKey + " " +event.keyCode);
}

Deepak Kumar Vasudevan
http://deepak.portland.co.uk/

Re: ALT Key

Vasudevan Deepak Kumar3-Jun-03 18:40

Vasudevan Deepak Kumar

3-Jun-03 18:40

Hi Valeria,

Check out this URL:

http://www.syncfusion.com/FAQ/WinForms/FAQ_c46c.asp[^]

Deepak Kumar Vasudevan
http://deepak.portland.co.uk/

Re: ALT Key

3-Jun-03 22:16

;o) thank you

Windows to *nix with Mono

Kannan Kalyanaraman3-Jun-03 0:31

Kannan Kalyanaraman

3-Jun-03 0:31

Is it possible to take a .net binary compiled under Windows and take the binary, and run it under Mono(under any *nix platform) without recompilation. I understand that Mono has WineLib related bindings and patches for porting applications written in windows to *nix, but I'm not sure if it would need a recompilation.

thanks
Kannan

Re: Windows to *nix with Mono

Daniel Turini3-Jun-03 0:41

Daniel Turini

3-Jun-03 0:41

Kannan Kalyanaraman wrote:
Is it possible to take a .net binary compiled under Windows and take the binary, and run it under Mono(under any *nix platform) without recompilation. I understand that Mono has WineLib related bindings and patches for porting applications written in windows to *nix, but I'm not sure if it would need a recompilation.
In theory you could do it, I never tried it, though.
I intend to do it as soon as our project hit the next deadline, so I'll have some time to play with new technologies.

Kant wrote:
Actually she replied back to me "You shouldn't fix the bug. You should kill it"

Re: Windows to *nix with Mono

Giles3-Jun-03 2:12

Giles

3-Jun-03 2:12

Good question. I know that hey use NUnit as the Unit testing tool on Mono, and it seems to work fine with Mono assemplies and Windows assemblies.

"Je pense, donc je mange." - Rene Descartes 1689 - Just before his mother put his tea on the table.

Shameless Plug - Distributed Database Transactions in .NET using COM+

Re: Windows to *nix with Mono

Philip Fitzsimons3-Jun-03 2:46

Philip Fitzsimons

3-Jun-03 2:46

I would GUESS that it works for libs but not for .exe

i.e. libs are a defined .net format, whilst .exe are windows - they have win32 code to load up .net and complile the .net machine code.

but only a guess..

"When the only tool you have is a hammer, a sore thumb you will have."

Re: Windows to *nix with Mono

James T. Johnson3-Jun-03 23:13

James T. Johnson

3-Jun-03 23:13

Philip Fitzsimons wrote:
whilst .exe are windows - they have win32 code to load up .net and complile the .net machine code.

Sorta...assuming 100% managed code there are two entry points in an executable.

The first is the one that lets Win2K, Win98, and WinME work; it is the standard one used by all programs, it merely makes a call to the .NET runtimes _CorExeMain function.

The second entry point is the one you define with the Main method and is managed code: WinXP and Win2K3 use this directly, bypassing the first/normal entry point because they are .NET aware.

I tried to find a document I had which described the loading process in detail, in particular the loading mechanism used by WinXP+. Unfortunately I could't find it so I had to go from my stale memory.

The first entry point is described in Tom Archer's Inside C# first edition, but my second edition is out on loan to a friend so I can't check that one.

James

"I despise the city and much prefer being where a traffic jam means a line-up at McDonald's"
Me when telling a friend why I wouldn't want to live with him

Re: Windows to *nix with Mono

apferreira3-Jun-03 3:03

apferreira

3-Jun-03 3:03

Up until now there is no sure way to port Windows Forms since they make extensive calls to the Win32 API.

Re: Windows to *nix with Mono

Kannan Kalyanaraman3-Jun-03 4:59

Kannan Kalyanaraman

3-Jun-03 4:59

But in the mono, they are having two options for implementing winforms
One through the GTK route and the other through wine emulation, they have a patched versino of winelib for this purpose, in this route winforms would work without any code modifications (hopefully without recompilation Unsure | :~

)

Cheers,
Kannan

Re: Windows to *nix with Mono

apferreira4-Jun-03 2:11

apferreira

4-Jun-03 2:11

If they really make that work in a consistent way it would be a good thing, although I seriously doubt that that these emulations will work without recompilation Unsure | :~

.

Lets wait and see. Sleepy | :zzz:

Managed DirectX on the Desktop

Jacques Buitendag3-Jun-03 0:25

Jacques Buitendag

3-Jun-03 0:25

Hi all,

I would like to know if it is posible to use DirectX to draw to the windows desktop using c#.

If this is posible how would I go about it.

Kind Regards
Jacques Buitendag

Re: Managed DirectX on the Desktop

Philip Fitzsimons3-Jun-03 2:49

Philip Fitzsimons

3-Jun-03 2:49

you need to use FindWindow() GetWindowDC() to do this.
Beware that different versions of windows have 'different' desktops - i.e. under xp/98 there is a ListView control which is what you place icons on - you want to draw to this. (this listview effectivly hides the desktop window)
Whilst under other versions you need to get GetDesktopWindow()

"When the only tool you have is a hammer, a sore thumb you will have."

Re: Managed DirectX on the Desktop

Jacques Buitendag3-Jun-03 3:38

Jacques Buitendag

3-Jun-03 3:38

Thanks Philip,

I remember that these functions return a hwnd handle.

So how can I go from the hwnd handle to and usable DirectX device in C#

Kind Regards
Jacques Buitendag

Multilanguage application

aeros2-Jun-03 21:53

aeros

2-Jun-03 21:53

Hi all!

I'm working on an real estates software and it will be available in multiple language (english, french, italian, and many more).
We choose C#/.Net with VS2003 for devolopping the software.
My question is what is the best way to do a multi-language application ? I mean that I don't want to change a single ligne of code if tomorrow we add a new language.
For example, a solution available in a standard MFC/C++ application is to make a DLL with all string tables as resources but we can't do this in C#/.Net (i think).
Any suggestion ?

Many thanks,
--
F.Julian

Re: Multilanguage application

apferreira3-Jun-03 1:36

apferreira

3-Jun-03 1:36

In C# NET you create embedded resource files (*.resx)that will be transformed in satellite assemblies (resource only dlls) if you specify that your application is localizable.

In Form properties, got to the localizable property and set it to true. Then change the language property to the language you want and edit your form's title, menus etc in design view. For message boxes, error messages and other things, add a resource file (through V.S. add new item option) to your project with the specified localized strings or typed resource. These added files must use the convention name.culture.resx (i.e. for French you could have Strings.fr-FR.resx has the name). Do not forget to include a fallback neutral resource file also (no need to do this for the form's specific resources since all forms have a fallback resoruce file by default).

Use Resource Manager in your code to get the specified string or typed resource from the localized resource file.

And remember, before doing all of this, code your application so that the executable code can be clearly separated from localized resources.

auto add to toolbox

Roger Alsing2-Jun-03 21:52

Roger Alsing

2-Jun-03 21:52

does anyone have any idea how i can add my (own) components to the toolbox at installtime (via my installer)?

do i need to register them in the GAC or is it possible anyway?

and how do i actually add them via code? , is there some file that i can alter , or is it in the registry?

any ideas?

//Roger

How to pass null instead of ref Rectangle

J. Dunlap2-Jun-03 10:19

J. Dunlap

2-Jun-03 10:19

I'm writing a DllImport declare for the ScrollWindowEx() function. I'm wanting to be able to pass null for some of the Rectangle arguments.

How should I marshall the rectangles?
Rose | [Rose]

[MarshallAs(UnmanagedType.LPStruct)] IntPtr lpRCScroll
Rose | [Rose]

ref Rectangle lpRCScroll
Rose | [Rose]

other

(This is what I have right now)

[DllImport("user32.dll", EntryPoint = "ScrollWindowEx")]
private extern static int ScrollWindowEx(IntPtr hwnd, 
	int dx, int dy, 
	ref Rectangle lpRCScroll, ref Rectangle lpRCClip,
	IntPtr hrgnUpdate, ref Rectangle lpRCUpdate, 
	int fuScroll);

"Blessed are the peacemakers, for they shall be called sons of God." - Jesus

"You must be the change you wish to see in the world." - Mahatma Gandhi

Re: How to pass null instead of ref Rectangle

James T. Johnson2-Jun-03 11:02

James T. Johnson

2-Jun-03 11:02

jdunlap wrote:
ref Rectangle lpRCScroll

IIRC the Rectangle struct doesn't marshal to a Win32 RECT so you'll either have to do the marshalling yourself Dead | X|

or create a new class which does marshal as a RECT (really easy).

Creating a new class also lets you specify null as a value.

James

"I despise the city and much prefer being where a traffic jam means a line-up at McDonald's"
Me when telling a friend why I wouldn't want to live with him

Re: How to pass null instead of ref Rectangle

J. Dunlap2-Jun-03 11:55

J. Dunlap

2-Jun-03 11:55

James T. Johnson wrote:
or create a new class which does marshal as a RECT (really easy).

I had that suspicious feeling when I was looking at the UnsafeNativeMethods namespace. Half the things there are classes.

"Blessed are the peacemakers, for they shall be called sons of God." - Jesus

"You must be the change you wish to see in the world." - Mahatma Gandhi

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