Managed C++/CLI

lavy288328-May-07 1:36

28-May-07 1:36

it's not working.... Frown | :(

Giorgi Dalakishvili28-May-07 2:29

Giorgi Dalakishvili

28-May-07 2:29

lavy2883 wrote:
it's not working

What it? If you are getting exception it means that the string is not number

my articles

lavy288328-May-07 2:39

Re: error to the input string..please help [modified]

28-May-07 2:39

If I make the code like this
private: System::Void ContainerWidthtextBox_TextChanged(System::Object^ sender, System::EventArgs^ e) {
W = Convert::ToInt32(ContainerWidthtextBox->Text);//, CultureInfo::CurrentCulture);
if(W <= 0)
{
MessageBox::Show("You must specify a Container Width greater than 0" , "Error", MessageBoxButtons::OK, MessageBoxIcon::Error, MessageBoxDefaultButton::Button1);
return

}
}

it's not working either..it put me the same error...but if I have in may interface another textbox let's say ContainerHeighttextBox and if I put the code like this.....

private: System::Void ContainerWidthtextBox_TextChanged(System::Object^ sender, System::EventArgs^ e) {
//the code was first here
}
}

private: System::Void ContainerHeighttextBox_TextChanged(System::Object^ sender, System::EventArgs^ e) {
//now I put it here
W = Convert::ToInt32(ContainerWidthtextBox->Text);//, CultureInfo::CurrentCulture);
if(W <= 0)
{
MessageBox::Show("You must specify a Container Width greater than 0" , "Error", MessageBoxButtons::OK, MessageBoxIcon::Error, MessageBoxDefaultButton::Button1);
return;
}

it's works but it's show me the messageBox after I introduce the value in the first textbox(it show me the messagebox at the seccond textbox not at the first where I need it )

lavi

teejayem28-May-07 6:07

teejayem

28-May-07 6:07

You could also be having problems because you are using the TextChanged event. that means anytime you add/remove a character from the textbox it will fire this event which i don't think is what you want. I would rather use the Leave or Validating event. also i would do a bit more validating like checking for text length and use the Int32::TryParse like christian suggested.

if (ContainerWidthtextBox->TextLength > 0){
    int w = 0;

    if (Int32::TryParse(ContainerWidthtextBox->Text, w)){
        if (w <= 0){
            MessageBox::Show("You must specify a Container Width greater than 0" , "Error", MessageBoxButtons::OK, MessageBoxIcon::Error, MessageBoxDefaultButton::Button1);
            return;
        }
    }
    else
        MessageBox::Show("you did not enter a valid number.");
}

-- modified at 12:28 Monday 28th May, 2007

Don't be overcome by evil, but overcome evil with good

lavy288328-May-07 7:20

28-May-07 7:20

thanks..,that was not realy my problem ...for example if for the "ContainerWidthtextBox" I have the value 230 from the interface and I want to put a condition for the "ContainerHeighttextBox" to not be less than 2*ConatinerWidthtextBox.... I managed to do this(to put the condition)...but it not let me to introduce all the numbers for the ContainerHeighttextBox because it give me ..... after the first number... let's say "2" MessageBox that the number introduced is not....whatever...please help me.
Y can solve this problem only if I put the condition in the textBox that it's after the ContainerHeighttextBox..let's say...depttextBox

lavy

Christian Graus28-May-07 11:10

28-May-07 11:10

You said 'it's not working', but you didn't do what I said.... Confused | :confused:

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

lavy288328-May-07 22:30

Re: classes a few questions

28-May-07 22:30

thanks...It help me a lot...sorry ...

classes a few questions

Xeef26-May-07 11:41

Xeef

26-May-07 11:41

hi all

if some one whit knowledege coud sacrify 2-3 minutes it woud save me a day time Wink | ;)

a have a class X now i wana make a class Y wich woud derive all methodes, variables of X and has new ones
i wana ensure in X that certain methode are implemented in Y wich arent in X but declared
i wana overwrite methodes of X in Y
how do i write functions for operators that this works :

Myclass a=Myclass();
a++;
a=a*a;
...
..

i was try to use System::String inside a struct and was geting erros that i cant use a managed type in a struct blabla
i have solved this by using a class instead but woud by nice to know if there is a way around
similair problems seams to ocure if i try to use them as static
i woud like to have a static array in my class whit a pointer to all instances of this class this is important else way i have trubel

if some one coud give me a 10-20 line example it woud by great
just code no need for description

Xeef26-May-07 22:03

Xeef

26-May-07 22:03

working half way

how can i get this out of class.h in to the class.cpp file :

virtual int Show(void){return 1;};

virtual int Show(void)override{....

something like :
virtual int Memory::Show(void)override{

wich isnt woking Cry | :((

Re: classes a few questions

Christian Graus27-May-07 0:09

Re: RETURN VALUE TO WHERE [modified]

27-May-07 0:09

You need to define operator* and operator+.

RETURN VALUE TO WHERE

KARFER25-May-07 6:19

KARFER

25-May-07 6:19

Hi all

i want to know that when i return value from the function the value return to where

thank's for all

To Be Or Not To Be
(KARFER)

Mark Salsbery25-May-07 6:19

Mark Salsbery

25-May-07 6:19

OSAMA SALLAM wrote:
when i return value from the function the value return to where

the caller Smile | :)

(really!)

-- modified at 13:42 Friday 25th May, 2007

I thought this question was familiar - see here[^]

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

Re: RETURN VALUE TO WHERE

Christian Graus25-May-07 9:57

Re: RETURN VALUE TO WHERE

25-May-07 9:57

This is the C++/CLI forum, I assume this question is about C++ in general. I recommend buying a very base level beginner book and working through it.

Hamid_RT28-May-07 7:29

Hamid_RT

28-May-07 7:29

Does this question for this forum or Sql ?

WhiteSky

how do i remove a MouseEventHandler [modified]

Xeef25-May-07 3:14

Xeef

25-May-07 3:14

hi all
stuckt agein
hope i not highjack this hole topic WTF | :WTF:

void Disp::Lock_Down(System::Object ^o, System::Windows::Forms::MouseEventArgs ^e){<br />
	Lock->MouseMove += gcnew System::Windows::Forms::MouseEventHandler( this, &Disp::Lock_Drag );<br />
	MousePosition=MainF->MousePosition;<br />
}<br />
void Disp::Lock_Up(System::Object ^o, System::Windows::Forms::MouseEventArgs ^e){<br />
>>>>>>>>>>>>>> not like this but how ???  :confused:	<br />
	Lock->MouseMove->Remove(this, &Disp::Lock_Drag);<br />
<<<<<<<<<<<<<<<br />
}

-- modified at 9:48 Friday 25th May, 2007

this works

void Disp::Lock_Down(System::Object ^o, System::Windows::Forms::MouseEventArgs ^e){<br />
	t = gcnew System::Windows::Forms::MouseEventHandler( this, &Disp::Lock_Drag );<br />
	Lock->MouseMove += t;<br />
	MousePosition=MainF->MousePosition;<br />
}<br />
void Disp::Lock_Up(System::Object ^o, System::Windows::Forms::MouseEventArgs ^e){<br />
	Lock->MouseMove -= t;<br />
}

BUT i realy not like "t"
is there a way to get it somehow else mayby out of Object ^o or MouseEventArgs ^e
or how ever whit out the need to store it by my self

c++ coding

farrakh25-May-07 0:17

farrakh

25-May-07 0:17

i want a code of piano play with mouse in c++ coding

Try reading this forum Guide[^]

led mike25-May-07 5:09

led mike

25-May-07 5:09

Wow

Mark Salsbery25-May-07 6:19

Mark Salsbery

25-May-07 6:19

led mike wrote:
Wow

World of Warcraft? Poke tongue | ;-P

See Here[^]

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

Mark Salsbery25-May-07 10:48

Mark Salsbery

25-May-07 10:48

The above link is for the OP, BTW Smile | :)

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

Christian Graus25-May-07 9:58

25-May-07 9:58

1 - this is the C++/CLI forum. It's different to C++
2 - this is a place to ask for help with your code, not to request people give you code. I know of no place that allows you to ask for people to just write code for you, without offering to pay them for it.

Hamid_RT28-May-07 7:25

Hamid_RT

28-May-07 7:25

Christian Graus wrote:
this is a place to ask for help with your code, not to request people give you code

Well said. Big Grin | :-D

WhiteSky

question

faradgi24-May-07 13:20

faradgi

24-May-07 13:20

hi friend
i start programming in c++ but i can't write a program with my knowledge i know the rules in programs but i don't know how to write a program please guide me to be a real programmer

Sincerely yours Rose | [Rose]

Re: question

Christian Graus24-May-07 20:29