C++/CLI : how to call a function from a user control?

Trips · Oct 29, 2010

Hello,

I am totally novice in programming with C++/CLI and not very well trained in object oriented programming.
I have started to write a C++/CLI application to control a small industrial type installation.
Some buttons of my HMI are used to close or open valves.
For that purpose, I have put buttons on which the user can click to perform the appropriate action.
Each of the buttons call a function Valve_move (int i, int j); the first parameter is used to specify the action (close or open) and the second one to specify the valve number to be moved.
Everything was working well until I decided to write special User Control .
Introducing this User Control , I get now the following message from the compiler :
"error C3861: Valve_move : identificateur introuvable" ; sorry I am French and my Visual C++ speaks French !!
It means that it cannot find my function Valve_move(i,j) anymore.
The Valve_move function is part of the Form1.h file and is working perfectly when called from a simple button put in Form1.h
Then it seems that calling the function from a User Control is not as simple as calling it from a normal button.
I saw several topics close to that but none was dedicated to C++/CLI ou clear enough for me to guide me in solving the problem.
In order to highlight the problem I wrote a very simple program my_control with Form1.h which includes my User Control as weel as the Valve_move function.
The User Control is very simple and includes two buttons "Close" and "Open" and a numericUpDown to select the valves

Here is the code of Form1.h

<div style="color:Black; background-color:White
<pre>#include <span style="color:#a31515 "my_panel.h"

#pragma once

<span style="color:Blue namespace
my_control {

<span style="color:Blue using
<span style="color:Blue namespace
System;
<span style="color:Blue using
<span style="color:Blue namespace
System::ComponentModel;
<span style="color:Blue using
<span style="color:Blue namespace
System::Collections;
<span style="color:Blue using
<span style="color:Blue namespace
System::Windows::Forms;
<span style="color:Blue using
<span style="color:Blue namespace
System:

ata;
<span style="color:Blue using
<span style="color:Blue namespace
System:

rawing;



<span style="color:Green /// Description rÃsumÃe de Form1

<span style="color:Green ///

<span style="color:Green /// AVERTISSEMENT : si vous modifiez le nom de cette classe, vous devrez modifier la

<span style="color:Green /// propriÃtÃ Nom du fichier de ressources de loutil de compilation de ressource managÃe

<span style="color:Green /// pour tous les fichiers .resx dont dÃpend cette classe. Dans le cas contraire,

<span style="color:Green /// les concepteurs ne pourront pas interagir correctement avec les ressources



<span style="color:Blue public
<span style="color:Blue ref class
Form1 : <span style="color:Blue public
System::Windows::Forms::Form
{
<span style="color:Blue public
:
Form1(<span style="color:Blue void
)
{
InitializeComponent();




~Form1()
{
<span style="color:Blue if
(components)
{
<span style="color:Blue delete
components;
}
}




System::ComponentModel::Container ^components;

#pragma region Windows Form Designer generated code


<span style="color:Green /// MÃthode requise pour la prise en charge du concepteur - ne modifiez pas



my_panel1 = (SuspendLayout();
my_panel1->Location = System:

rawing:

oint(12, 27);
my_panel1->Name = Lmy_panel1->Size = System:

rawing::Size(262, 150);
my_panel1->TabIndex = 0;
AutoScaleDimensions = System:

rawing::SizeF(6, 13);
AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
ClientSize = System:

rawing::Size(292, 266);
Controls->Add(my_panel1);
Name = LText = LResumeLayout(<span style="color:Blue false
);

}
#pragma endregion

<span style="color:Blue void
Valve_move (<span style="color:Blue int
i_function, <span style="color:Blue int
i_valve)
{
<span style="color:Blue if
(i_function == 0)
{
<span style="color:Green // put here the code to close the valve //

}
<span style="color:Blue else
<span style="color:Blue if
(i_function == 1)
{
#pragma once

<span style="color:Blue using
<span style="color:Blue namespace
System;
<span style="color:Blue using
<span style="color:Blue namespace
System::ComponentModel;
<span style="color:Blue using
<span style="color:Blue namespace
System::Collections;
<span style="color:Blue using
<span style="color:Blue namespace
System::Windows::Forms;
<span style="color:Blue using
<span style="color:Blue namespace
System:

ata;
<span style="color:Blue using
<span style="color:Blue namespace
System:

rawing;





<span style="color:Blue public
<span style="color:Blue ref class
my_panel : <span style="color:Blue public
System::Windows::Forms::UserControl
{
<span style="color:Blue public
:
my_panel(<span style="color:Blue void
)
{
InitializeComponent();




~my_panel()
{
<span style="color:Blue if
(components)
{
<span style="color:Blue delete
components;
}
}
<span style="color:Blue private
: System::Windows::Forms::GroupBox^ groupBox1;
<span style="color:Blue protected
:
<span style="color:Blue private
: System::Windows::Forms::NumericUpDown^ numericUpDown1;
<span style="color:Blue private
: System::Windows::Forms::Button^ button2;




System::ComponentModel::Container ^components;

#pragma region Windows Form Designer generated code


<span style="color:Green /// MÃthode requise pour la prise en charge du concepteur - ne modifiez pas



groupBox1 = (numericUpDown1 = (button2 = (button1 = (groupBox1->SuspendLayout();
(cli::safe_cast<System::ComponentModel::ISupportInitialize^ >(numericUpDown1))->BeginInit();
SuspendLayout();
groupBox1->BackColor = System:

rawing::SystemColors::GradientInactiveCaption;
groupBox1->Controls->Add(numericUpDown1);
groupBox1->Controls->Add(button2);
groupBox1->Controls->Add(button1);
groupBox1->Location = System:

rawing:

oint(17, 12);
groupBox1->Name = LgroupBox1->Size = System:

rawing::Size(225, 125);
groupBox1->TabIndex = 0;
groupBox1->TabStop = groupBox1->Text = LnumericUpDown1->Location = System:

rawing:

oint(29, 37);
numericUpDown1->Maximum = System:

ecimal((4) {20, 0, 0, 0});
numericUpDown1->Minimum = System:

ecimal((4) {1, 0, 0, 0});
numericUpDown1->Name = LnumericUpDown1->Size = System:

rawing::Size(50, 20);
numericUpDown1->TabIndex = 2;
numericUpDown1->Value = System:

ecimal((4) {1, 0, 0, 0});
button2->BackColor = System:

rawing::Color::Red;
button2->Location = System:

rawing:

oint(133, 70);
button2->Name = Lbutton2->Size = System:

rawing::Size(75, 23);
button2->TabIndex = 1;
button2->Text = Lbutton2->UseVisualStyleBackColor = button2->Click += <span style="color:Blue gcnew
System::EventHandler(button1->BackColor = System:

rawing::Color::FromArgb(((0)), ((192)),
((0)));
button1->Location = System:

rawing:

oint(133, 19);
button1->Name = Lbutton1->Size = System:

rawing::Size(75, 23);
button1->TabIndex = 0;
button1->Text = Lbutton1->UseVisualStyleBackColor = button1->Click += <span style="color:Blue gcnew
System::EventHandler(AutoScaleDimensions = System:

rawing::SizeF(6, 13);
AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
Controls->Add(groupBox1);
Name = LSize = System:

rawing::Size(262, 150);
groupBox1->ResumeLayout((numericUpDown1))->EndInit();
ResumeLayout(<span style="color:Blue false
);

}
#pragma endregion
 (numericUpDown1->Value);
Valve_move (1,i_valve); <span style="color:Green // 1 is for opening

}
 (numericUpDown1->Value);
Valve_move (0,i_valve); #include <span style="color:#a31515 "StdAfx.h"

#include <span style="color:#a31515 "my_panel.h"

[/code]

I hope I made my question as clear as possible and I thank in advance those who will read me and particularly those who will help me in solving this problem.
Regards

Jean-Louis

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C++/CLI : how to call a function from a user control?

Trips

Well-known member

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