Managed C++/CLI

System::Drawing namespace is not found

19-Jun-09 4:41

Richard Andrew x64 wrote:
Why does it do this, and what can I do about it?

The why is most like dependent on what is in the source buffer. The most obvious guess is that it contains a null byte at 257

Richard Andrew x6418-Jun-09 12:24

Richard Andrew x64

18-Jun-09 12:24

When I put using namespace System::Drawing; into my ref class header file, it says that "'Drawing' is not a member of 'System'" Confused | :confused:

I have manually added a reference to the System.Drawing.dll, but it still can't find the Drawing namespace.

What could be wrong?

Re: System::Drawing namespace is not found

Richard Andrew x6418-Jun-09 13:08

Richard Andrew x64

18-Jun-09 13:08

Nevermind, I rebuilt the project, and now it works.

Seems the problem had to do with the pre-compiled header not being rebuilt.

Assign EventHandler of one button to another

TheBerk18-Jun-09 12:04

18-Jun-09 12:04

Hi, sorry if this has already been answered somewhere, I wasn't able to locate it. I'm trying to dynamically assign one buttons "ButtonClick" event handler to another.
ex: Button2->Click = Button1->Click;

Except I get this error:
error C3918: usage requires 'System::Windows::Forms::Button::Click' to be a data member

I know this means I need to do something like "gcnew EventHandler(this, &Button1_Click);", which is how button 1 is setup, but is there anyway to assign that event dynamically to Button2? Thanks!

Luc Pattyn18-Jun-09 13:20

18-Jun-09 13:20

Hi,

My C++/CLI is not fluent, so I'll give you principles only.

All code is dynamic, it runs at run-time. Even the stuff you "design" using Visual Designer gets turned into real code, which sits hidden in some project files (look in your solution pane, there will be files you did not create yourself).

Then, whatever does it for button1 would also do it for button2, just create similar statements; do put them in one of your own files, possibly in your form's constructor, right after the call to InitializeComponents.

Smile | :)

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TheBerk19-Jun-09 3:09

19-Jun-09 3:09

Ok, but to setup Button2 like Button1 I would have to hard code the function name which I want to use as the event handler function (eg: Button2->Click += gcnew EventHandler(this, &BUTTON1_EVENT_FUNCTION);) I cannot do this, as I'm trying to set Button2 to whatever the last button used was, so I would like to avoid having to hard code EVERY possible function in some sort of switch statement for Button2. I just want to be able to set its EventHandler in run time.

N a v a n e e t h19-Jun-09 3:24

N a v a n e e t h

19-Jun-09 3:24

TheBerk wrote:
I cannot do this, as I'm trying to set Button2 to whatever the last button used was, so I would like to avoid having to hard code EVERY possible function in some sort of switch statement for Button2. I just want to be able to set its EventHandler in run time.

How button 2 is created? Is that created at run time? If you want to attach a event handler at run time, reflection is the way to go. Is that what you are talking about?

Smile | :)

Navaneeth

How to use google | Ask smart questions

TheBerk19-Jun-09 3:34

19-Jun-09 3:34

I create the Button2 in the designer just like normal button, and assign its event handler to a default function, but later on in runtime I want to change its even handler based on user interaction (So set Button2->Click to the same thing as Button1-Click). I'm not really sure what reflection is, do you have a link to some thing I can take a look at? Thanks!

Luc Pattyn19-Jun-09 3:46

19-Jun-09 3:46

Hi,

IMO you cannot easily copy an event handler reference, however if they are all buttons, you can just remember the last button clicked and then simulate a click for that button again. Here is an example using C#:

Button lastButton=null;

void buton1_Click(object sender, EventArgs e) {
    lastButton=sender as Button;
    // normal handler code
    ...
}

void buttonRepeat_Click(object sender, EventArgs e) {
    if (lastButton!=null) lastButton.PerformClick();
}

Luc Pattyn [Forum Guidelines] [My Articles]

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TheBerk19-Jun-09 4:19

How to delete a specific Registry Value

19-Jun-09 4:19

Yeah, that's something I've thought about, but this is something along the development process I'm going to be doing a lot, and I don't want to have to create a whole bunch of hold member variables for each button like this I make. I've made this utility function to take care of assign different buttons, but that event handler is leaving me at a loss.

System::Void vtkview::AssignPrevButton(System::Windows::Forms::Button^ pMainButton, 			System::Windows::Forms::Button^ pSelectedMenuItem)
	{
		if(pMainButton->;Text != pSelectedMenuItem->;Text)
		{
			pMainButton->Text = pSelectedMenuItem->Text;
			pMainButton->Image = pSelectedMenuItem->Image;
			//pMainButton->Click = pSelectedMenuItem->Click;
                        //I need something like this above line, but I'm stumped.
		}
	}

Thanks for the help!

J_E_D_I18-Jun-09 6:06

J_E_D_I

18-Jun-09 6:06

Hi guys, could someone please shed some light on how to delete a single Registry Value but leaving the Key that contains it untouched.

Thanks

Re: How to delete a specific Registry Value

led mike18-Jun-09 6:22

18-Jun-09 6:22

"The following code example shows how to create a subkey under HKEY_CURRENT_USER, manipulate its contents, and then delete the subkey. "

link[^]

ListView C++

wael_r17-Jun-09 21:43

wael_r

17-Jun-09 21:43

just i want to know how to modify item ans subitem in listview

Re: ListView C++

led mike18-Jun-09 4:28

Need to Know about <ncurses.h></ncurses.h>

18-Jun-09 4:28

wael_r wrote:
just i want to know how to modify item ans subitem in listview

We can't make you know anything, you have to learn. So, given the abundance of documentation and sample code freely available on the internet for your subject, what is keeping you from learning this?

LustraSacN17-Jun-09 20:36

LustraSacN

17-Jun-09 20:36

I'm currently doing small programmes in linux enviornment by using g++ compiler.

killabyte18-Jun-09 3:35

killabyte

18-Jun-09 3:35

have you tried reading? i know i know how ever thought reading would come in handy... but honestly it comes in handy sometimes.

Luc Pattyn18-Jun-09 4:43

18-Jun-09 4:43

I don't understand. can you give example?
codez would be appreciated very much.

Smile | :)

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led mike18-Jun-09 5:10

18-Jun-09 5:10

Luc Pattyn wrote:
codez would be appreciated very much.

You don't need codez to read anymore, you just need one of these[^] Laugh | :laugh:

Luc Pattyn18-Jun-09 5:18

18-Jun-09 5:18

Hmm. I don't think I like that very much, reminds me of doctor Black, who got murdered in the library with the kindlestack.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

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led mike18-Jun-09 5:22

18-Jun-09 5:22

Thanks, now I have to clean coffee off my monitor.

Laugh | :laugh:

Luc Pattyn18-Jun-09 5:25

18-Jun-09 5:25

What? you can't take a little joke without a joke icon warning you beforehand?
You'd better read some MSDN stuff then.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

DISCLAIMER: this message may have been modified by others; it may no longer reflect what I intended, and may contain bad advice; use at your own risk and with extreme care.

led mike18-Jun-09 5:28

18-Jun-09 5:28

We don't get the joke icon in the email! And they call you an MVP! Poke tongue | ;-P

Luc Pattyn18-Jun-09 5:35

18-Jun-09 5:35

Sorry, let me help[^].
If need be, ask Google for help.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

DISCLAIMER: this message may have been modified by others; it may no longer reflect what I intended, and may contain bad advice; use at your own risk and with extreme care.