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I am new to windows programming, and am using Visual Studio .Net 2003.
I have a standard managed form which contains a number of data entry fields (textboxes, radio buttons etc), and a couple of buttons.
One of the buttons (labelled Save) activates an event handler that calls two functions. The first function will perform some validation on the data entered in the form, and then displays a message on a second smaller form with an OK button. This OK button closes the form. The second function then formats some of the data, and will eventually write it to a file.
How do I stop the second function running until after the OK button on the form displayed by the first function is clicked ? Or, in other words, how do I stop the 2nd function from running until the first is complete.
The program so far is listed below, and the event handler concerned is called collegeForm::buttonSave.
Many thanks
#using <mscorlib.dll>
#using <system.dll>
#using <system.drawing.dll>
#using <system.windows.forms.dll>
using namespace System;
using namespace System::Drawing;
using namespace System::Windows::Forms;
__gc class collegeForm : public Form
{
public :
collegeForm();
private :
Label *labelSurname;
Label *labelForename;
Label *labelGender;
Label *labelDateOfBirth;
Label *labelAccomodation;
Label *labelSupportCode;
Label *labelCourseCode;
TextBox *surname;
TextBox *forename;
TextBox *courseCode;
TextBox *dateOfBirth;
ComboBox *supportCode;
GroupBox *gender;
RadioButton *male;
RadioButton *female;
GroupBox *accomodation;
RadioButton *parentalHome;
RadioButton *lodgings;
RadioButton *hallsOfResidence;
Button *save;
Button *clear;
MainMenu * mainMenu;
void buttonSave(Object *Sender, EventArgs *Args);
void buttonClear(Object *Sender, EventArgs *Args);
Int32 validateForm(void);
void formatNames(void);
};
__gc class errorMessage : public Form
{
public :
errorMessage();
errorMessage(String *);
private :
Label *message;
Button *ok;
void buttonOK(Object *Sender, EventArgs *Args);
};
errorMessage::errorMessage()
{
}
errorMessage::errorMessage(String * errorMessage)
{
this->Text = S"Error Message";
message = new Label;
message->Text = errorMessage;
message->Location = Point(25,100);
this->Controls->Add(message);
ok = new Button;
ok->Location = Point(180,120);
ok->Text = "OK";
ok->Click += new EventHandler(this,buttonOK);
this->Controls->Add(ok);
}
void errorMessage::buttonOK(Object *Sender, EventArgs *Args)
{
Close();
}
collegeForm::collegeForm()
{
this->Text = S"College Enrollment Database";
labelSurname = new Label;
labelSurname->Text = S"Surname";
labelSurname->Location = Point(25,100);
this->Controls->Add(labelSurname);
labelForename = new Label;
labelForename->Text = S"Forename";
labelForename->Location = Point(25,150);
this->Controls->Add(labelForename);
labelGender = new Label;
labelGender->Text = S"Gender";
labelGender->Location = Point(25,200);
this->Controls->Add(labelGender);
labelDateOfBirth = new Label;
labelDateOfBirth->Text = S"Date Of Birth";
labelDateOfBirth->Location = Point(25,250);
this->Controls->Add(labelDateOfBirth);
labelAccomodation = new Label;
labelAccomodation->Text = S"Accomodation";
labelAccomodation->Location = Point(25,300);
this->Controls->Add(labelAccomodation);
labelSupportCode = new Label;
labelSupportCode->Text = S"Support Code";
labelSupportCode->Location = Point(25,350);
this->Controls->Add(labelSupportCode);
labelCourseCode = new Label;
labelCourseCode->Text = S"Course Code";
labelCourseCode->Location = Point(25,400);
this->Controls->Add(labelCourseCode);
surname = new TextBox;
surname->Location = Point(125,100);
surname->Width = 200;
this->Controls->Add(surname);
forename = new TextBox;
forename->Location = Point(125,150);
forename->Width = 200;
this->Controls->Add(forename);
courseCode = new TextBox;
courseCode->Location = Point(125,400);
courseCode->Width = 100;
this->Controls->Add(courseCode);
dateOfBirth = new TextBox;
dateOfBirth->Location = Point(125,250);
dateOfBirth->Width = 200;
this->Controls->Add(dateOfBirth);
supportCode = new ComboBox;
supportCode->Location = Point(125,350);
supportCode->Width = 230;
supportCode->Items->Add(S"No Known Disability");
supportCode->Items->Add(S"Dyslexia");
supportCode->Items->Add(S"Blind or Partially Sighted");
supportCode->Items->Add(S"Deaf or Impaired Hearing");
supportCode->Items->Add(S"Mobility Difficulties or Wheelchair User");
supportCode->Items->Add(S"Personal Care Support Required");
supportCode->Items->Add(S"Mental Health Difficulties");
supportCode->Items->Add(S"Unseen Disability - Diabetes, Asthma");
supportCode->Items->Add(S"Two Or More Of The Above");
supportCode->Items->Add(S"Other Disability Not Listed");
supportCode->Text = S"No Known Disability";
this->Controls->Add(supportCode);
gender = new GroupBox;
gender->Location = Point(125,175);
gender->Size = Drawing::Size(300,55);
Controls->Add(gender);
male = new RadioButton;
male->Location = Point(25,20); // These are coords in group box
male->Text = S"Male";
gender->Controls->Add(male);
female = new RadioButton;
female->Location = Point(150,20);
female->Text = S"Female";
gender->Controls->Add(female);
accomodation = new GroupBox;
accomodation->Location = Point(125,275);
accomodation->Size = Drawing::Size(450,55);
Controls->Add(accomodation);
parentalHome = new RadioButton;
parentalHome->Location = Point(25,20);
parentalHome->Text = S"&Parental Home";
accomodation->Controls->Add(parentalHome);
lodgings = new RadioButton;
lodgings->Location = Point(150,20);
lodgings->Text = S"Lodgings";
accomodation->Controls->Add(lodgings);
hallsOfResidence = new RadioButton;
hallsOfResidence->Location = Point(275,20);
hallsOfResidence->Text = S"&Halls Of Residence";
accomodation->Controls->Add(hallsOfResidence);
save = new Button;
save->Location = Point(175,500);
save->Text = S"&Save";
save->Click += new EventHandler(this,buttonSave);
this->Controls->Add(save);
clear = new Button;
clear->Location = Point(350,500);
clear->Text = S"&Clear";
clear->Click += new EventHandler(this,buttonClear);
this->Controls->Add(clear);
mainMenu = new MainMenu();
MenuItem *menuFile = mainMenu->MenuItems->Add("&File");
menuFile->MenuItems->Add("&Validate");
menuFile->MenuItems->Add("&Save");
menuFile->MenuItems->Add("&Clear");
menuFile->MenuItems->Add("-");
menuFile->MenuItems->Add("&Exit");
MenuItem *menuHelp = mainMenu->MenuItems->Add("&Help");
menuHelp->MenuItems->Add("&About");
Menu = mainMenu;
}
void collegeForm::buttonSave(Object *Sender, EventArgs *Args)
{
validateForm();
formatNames();
}
void collegeForm::buttonClear(Object *Sender, EventArgs *Args)
{
surname->Text = S"";
forename->Text = S"";
courseCode->Text = S"";
dateOfBirth->Text = S"";
supportCode->Text = S"";
male->Checked = false;
female->Checked = false;
parentalHome->Checked = false;
lodgings->Checked = false;
hallsOfResidence->Checked = false;
}
Int32 collegeForm::validateForm(void)
{
errorMessage * em = new errorMessage("This is a test");
em->Size = System::Drawing::Size(400,200);
em->Show();
return(1);
}
void collegeForm::formatNames(void)
{
String * left;
String * right;
String * temp;
if (surname->Text->Length > 1)
{
temp = surname->Text;
left = temp->Substring(0,1);
right = temp->Substring(1,temp->Length-1);
left = left->ToUpper();
right = right->ToLower();
temp = String::Concat(left,right);
surname->Text = temp;
}
if (forename->Text->Length > 1)
{
temp = forename->Text;
left = temp->Substring(0,1);
right = temp->Substring(1,temp->Length-1);
left = left->ToUpper();
right = right->ToLower();
temp = String::Concat(left,right);
forename->Text = temp;
}
}
int __stdcall WinMain()
{
collegeForm *cf = new collegeForm();
cf->Size = System::Drawing::Size(600,600);
Application::Run(cf);
return 0;
}
Simon Cornish
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Why should it be on the C++/CLI forum - Its a question about a windows ("Visual") application developed using Visual Studio hence why I posted it on the "Visual C++" forum.
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Visual C++ forum doesn't treat about Managed C++ questions... (whih can be - i agree - made only with Visual Studio IDE)...
TOXCCT >>> GEII power
[toxcct][VisualCalc 2.20] | soon : [VisualCalc 3.0]
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I have been developing my first ActiveX called MyJoy , which will use the Joystick and mouse as pointers. Snips of code in the MyJoyCtrl file is shown below.
BEGIN_MESSAGE_MAP(CMyJoyCtrl, COleControl)
ON_OLEVERB(AFX_IDS_VERB_PROPERTIES, OnProperties)
ON_MESSAGE(MM_JOY1MOVE, OnJoy1Move)
ON_WM_MOUSEMOVE()
END_MESSAGE_MAP()
Now I get the MM_JOY1MOVE messages but not the ON_WM_MOUSEMOVE, have I ommited something?
I have like for the Joystick included the OnMouseMove handler.
void CMyJoyCtrl::OnMouseMove(UINT nFlags, CPoint point)
{
x_m_pos = point.x;
y_m_pos = point.y;
if(capture == VARIANT_FALSE)
{
x_pos = x_m_pos;
y_pos = y_m_pos;
z_pos = 0;
}
}
Any suggestions please.
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Hi there,
the compiling the following function:
int foo(int a){
int x;
x = 5; // error C2143
int y;
return x;
}
with the following compiler options:
/Od /D "WIN32"
/D "_MBCS" /FD /MTd
/Fp".\Debug/WINZVT.pch"
/Fo".\Debug/"
/Fd".\Debug/"
/FR".\Debug/"
/W0 /nologo /c /ZI /TC
error C2143: Syntaxfehler: Es fehlt ';' vor 'eingeben'
misssing ';'
this code is legal c in my opinion
is anybopy here who can tell me why this fails ?
thanks in advance
ciao Elias
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if you are talking about pure C (not C++), ,this not is not valid. you have to declare all the variables before using them...
here, you declare int y; after x = 5;. switch these two lines.
TOXCCT >>> GEII power
[toxcct][VisualCalc 2.20] | soon : [VisualCalc 3.0]
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Hello guys ,
I have started studying STL and
I am experiencing following problem , here is my source code :
template <class T>
void printVector(const std::vector< T > &integers2);
int _tmain(int argc, _TCHAR* argv[])
{
std::vector< int > integers;
integers.push_back(2);
printVector(integers);
return 0;
}
template < class T >
void printVector(const std::vector< T > &integers2)
{
std::vector< T >::const_iterator constIterator;
for(constIterator = integers2.begin();
constIterator != integers2.end;
constIterator++)
cout<<*constIterator<<' ' ;
}
I am getting 3 errors.
Does anybody have Idea what I am doing wrong ?
PS. I am using Visual Studio 2005
"Success is the ability to go from one failure to another with no loss of enthusiasm." - W.Churchill
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Giorgi Moniava wrote: constIterator != integers2.end;
replace end with end()
moreover, next time, don't tell how many error you got, this is worthless. give directly the error messages !!! i'm sure here the compiler might tell you with an clear enough message what was wrong...
TOXCCT >>> GEII power
[toxcct][VisualCalc 2.20] | soon : [VisualCalc 3.0]
-- modified at 10:56 Thursday 8th December, 2005
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Giorgi Moniava wrote: thanks tox
you're welcome 
TOXCCT >>> GEII power
[toxcct][VisualCalc 2.20] | soon : [VisualCalc 3.0]
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Hi,
I am having problems with file locking. It seems some kind of
lock remains on a file even after it has been closed.
I have tried both C-library routines (fopen, fclose ... )
and native windows routines (CreateFile, CloseHandle.. )
but in both cases locking remains, and you can rename the file
only after program has been closed.
Routine where this happens contains some Oracle ProC-code and
seems to start some own threads. Could they be the culprit?
Anybody else have experience with this kind of thing?
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Use the Handle utility from www.sysinternals.com[^] to see what process has the file open.
"Take only what you need and leave the land as you found it." - Native American Proverb
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I want to add the Picturebox into the Form at runtime.
I don't want use Application::Run(Form*), I am creating my own Form.
It is displayed but It doesn't include the Picturebox.
Solution or any Idea.....please send.....
Thank you
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Dear friends,
we develop one module. server is broadcasting. client receive this broadcast. Bind() happen properly. socket create properly. It return value properly. At the time of receiving data, client create some problem. problem means entire application hangs. we use while loop. Result shows,
Brodcast done properly. Bind() happen proerly. then what is the reason that entire application hang properly at the time of receiving data.
Result also shows UDP port is proper. TCP/IP port is also proper. UDP port number is 3000. TCP/IP port is 1024.
Everything is properly , then also application hang.
sample code of that function
BOOL CEliteUtilities::ReceiveBroadcastUDP(CString *TargetIP,int *m_port)
{
SOCKADDR_IN addr_Srv, addr_Cli;
char szMessage[256];
int listenport;
int clilen;
int val = 1;
CString csTemp;
AfxSocketInit(NULL);
listenport =3000;
if (listenport < 1)
{
AfxMessageBox("Please enter a valid UDP listen port");
}
//-- Open a UDP socket
if ((sock_Receive = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
{
AfxMessageBox("Unable to create socket");
return FALSE;
}
//-- Fill in structure fields for binding to local host
//memset((char *) &addr_Srv, 0, sizeof(addr_Srv));
addr_Srv.sin_family = AF_INET;
addr_Srv.sin_addr.s_addr = htonl(INADDR_ANY);
addr_Srv.sin_port = htons(listenport);
int retval=bind(sock_Receive,(SOCKADDR* )&addr_Srv, sizeof(addr_Srv));
if(retval==0)
{
AfxMessageBox("Successfully done");
}
else
{
AfxMessageBox("Failed");
}
memset((char *)&addr_Cli, 0, sizeof(addr_Cli));
clilen = sizeof(addr_Cli);
/*while(1)
{
if(recvfrom(sock_Receive,szMessage,256,0,(sockaddr *)&addr_Cli,&clilen)==SOCKET_ERROR)
{
AfxMessageBox("Error in Receive From");
return false;
}
else
{
char test[5];
itoa(*m_port,test,10);
if(strcmp(szMessage,test)==0)
{
//AfxMessageBox("port detected");
break;
}
}
}*/
closesocket(sock_Receive);
return TRUE;
}
our application hang when debugger comes in while loop.
please give reply of my problem.
Regards
kedar
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Hi everyone,
I want to ask you, is there a way to get the real parent of a service process.
For example an application starts a service and this service appears under "service.exe" in the processes tree like its child process.So is there a way to understand which application indeed has started this service and called "::CreateService".
Thanks in advance!
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The service control manager (SCM) owns the service processes.
An application has only communicated with the SCM to ask it to start a service. The SCM does not track the requestor for CreateService or StartService. The information for CreateService ends up in the registry, as well as for ConfigureService.
You might deduce something from a system if you enable all the auditing. then I think an event log shows up with soem detals about services starting and stopping.
No shirt, no shoes, no brains, no service.
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I use Visual C++ 6.0.
I work on a pC that the screen have 15", When a compile the program and execute it on a PC that the screen have 21",the objects on the screen have not a good position like on 15" screen. All goes to the left corner.
What to do so that, I can have the good presentation independently of screen. In any screen dimension i must have a good design.
I learn my self
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I think you want to display controls at the right locations; well it depends on the screen resolution, which you can get using GetSystemMetrics(SM_CXSCREEN) for width and GetSystemMetrics(SM_CYSCREEN); for height. Then you can position your dialogs and windows using SetWindowPos(...) and MoveWindow(...).
this is this.
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Dear Sir, my problem is not that,
On my 15" screen I put some objects like Edit Control, Combox,... and on the position I prefer on my view.
And I make "SHOW" screen parameter to "MAXIMISE" on my App aplication so that when i open one view it is maximized.
My problem is the position of all object in the new screen. Why they don't occupy the some position acoording to the new dimension of screen ?
Will I use MOVEWINDOWS for all object on the view ? It is painfull i thing, is it n't?
What to do ?
I learn my self
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mikobi wrote: Will I use MOVEWINDOWS for all object on the view ?
Yes, the only option to avoid that is to use a dialog box that stays the same size (so, that you don't maximize it). Of course it will look 'smaller' on a screen with higher resolution but all controls will be at their right positions. If you search on this website, I know there is an article about a kind of rezisable dialog in which the controls are resized automatically.
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I think that is one of the ways it can be done. Alternatively you could buy one of the ActiveX controls to reposition, or even resize the controls according to the new screen dimensions.
I would suggest you handle the WM_SIZE message, and reposition or even resize some of the controls according to the new dimensions. It could be a little work, but worth it.
this is this.
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PLease help me;
That an example of one CEDIT Control, What codes to write for resize it ?
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It really is not totally about resizing. It is more about repositioning.
Like:
int x, y;<br />
CRect rect;<br />
GetClientRect(&rect);<br />
x = rect.Width();<br />
y = rect.Height();<br />
m_Edit.SetWindowPos(NULL,(x/2)-100, (y/2)-50,0,0,SWP_NOZORDER | SWP_NOSIZE);
It would position the Edit around the center of the dialog. Of course it is not perfect, but shows how it can be done; very simple.
If you need to position a control at the right-side of the dialog, then:
x = rect.Width()-100;
y = rect.Height()-100;
m_Button.SetWindowPos(NULL,x,y,0,0,SWP_NOZORDER | SWP_NOSIZE);
this is this.
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