How can I use add() method from the Form2 to listBox in another form?

L

lukasmazur

Hi

I have a problem with using listBox1. I have a two forms form1 and
form2. In form1 are controls listBox1, textBox1 and button witch
creating object of class Form2. In class Form2 I create a pointer to
object of class Form1. I don't known how to use method add(), where
can I find it. From Form1 I can add value like this this->listBox1-
Items[1]->Add("aaaa"); but from Form2 when I try to get this method
Click to expand...
I cant find it. I have textBox1 on Form1 and I can change text in this
control like this fm1->Controls["textBox1"]->Text = "text in box"; .
But Text is property of class not method like add().

How can I use add() method from the Form2 to listBox in another form?

VS2005Pro, .net Framework 2.0
Below I attach the listening


#Form1##########################################################
#pragma once
#include"Form2.h"


namespace naforum {

using namespace System;
using namespace System::ComponentModel;
using namespace System::Collections;
using namespace System::Windows::Forms;
using namespace System::Data;
using namespace System::Drawing;
public ref class Form1 : public System::Windows::Forms::Form
{
public:
Form1(void)
{
InitializeComponent();
//

//TODO: Add the constructor code here
//
}

protected:
/// <summary>
/// Clean up any resources being used.
/// </summary>
~Form1()
{
if (components)
{
delete components;
}
}
private: System::Windows::Forms::Button^ button1;
public: System::Windows::Forms::ListBox^ listBox1;
private:
public: System::Windows::Forms::TextBox^ textBox1;
protected:



private:
/// <summary>
/// Required designer variable.
/// </summary>
System::ComponentModel::Container ^components;

#pragma region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
void InitializeComponent(void)
{
this->button1 = (gcnew System::Windows::Forms::Button());
this->listBox1 = (gcnew System::Windows::Forms::ListBox());
this->textBox1 = (gcnew System::Windows::Forms::TextBox());
this->SuspendLayout();
//
// button1
//
this->button1->Location = System::Drawing::point(173, 12);
this->button1->Name = L"button1";
this->button1->Size = System::Drawing::Size(75, 23);
this->button1->TabIndex = 0;
this->button1->Text = L"button1";
this->button1->UseVisualStyleBackColor = true;
this->button1->Click += gcnew System::EventHandler(this,
&Form1::button1_Click);
//
// listBox1
//
this->listBox1->FormattingEnabled = true;
this->listBox1->Location = System::Drawing::point(16, 12);
this->listBox1->Name = L"listBox1";
this->listBox1->Size = System::Drawing::Size(120, 95);
this->listBox1->TabIndex = 1;
//
// textBox1
//
this->textBox1->Location = System::Drawing::point(16, 113);
this->textBox1->Name = L"textBox1";
this->textBox1->Size = System::Drawing::Size(100, 20);
this->textBox1->TabIndex = 2;
//
// Form1
//
this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
this->ClientSize = System::Drawing::Size(292, 273);
this->Controls->Add(this->textBox1);
this->Controls->Add(this->listBox1);
this->Controls->Add(this->button1);
this->Name = L"Form1";
this->Text = L"Form1";
this->ResumeLayout(false);
this->PerformLayout();

}
#pragma endregion
private: System::Void button1_Click(System::Object^ sender,
System::EventArgs^ e) {
Form2 ^fm2 = gcnew Form2();
fm2->Show();
this->listBox1->Items[1]->Add("aaaa"); //from this class method
is available
}
};
}

#Form2#####################################################################

#pragma once

using namespace System;
using namespace System::ComponentModel;
using namespace System::Collections;
using namespace System::Windows::Forms;
using namespace System::Data;
using namespace System::Drawing;


namespace naforum {

public ref class Form2 : public System::Windows::Forms::Form
{
public:
Form2(void)
{
InitializeComponent();
//
//TODO: Add the constructor code here
//
}

protected:
/// <summary>
/// Clean up any resources being used.
/// </summary>
~Form2()
{
if (components)
{
delete components;
}
}
private: System::Windows::Forms::Button^ button1;
protected:

private:
/// <summary>
/// Required designer variable.
/// </summary>
System::ComponentModel::Container ^components;

#pragma region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
void InitializeComponent(void)
{
this->button1 = (gcnew System::Windows::Forms::Button());
this->SuspendLayout();
//
// button1
//
this->button1->Location = System::Drawing::point(12, 22);
this->button1->Name = L"button1";
this->button1->Size = System::Drawing::Size(75, 23);
this->button1->TabIndex = 0;
this->button1->Text = L"button1";
this->button1->UseVisualStyleBackColor = true;
this->button1->Click += gcnew System::EventHandler(this,
&Form2::button1_Click);
//
// Form2
//
this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
this->ClientSize = System::Drawing::Size(292, 273);
this->Controls->Add(this->button1);
this->Name = L"Form2";
this->Text = L"Form2";
this->ResumeLayout(false);

}
#pragma endregion
private: System::Void button1_Click(System::Object^ sender,
System::EventArgs^ e) {
Form ^fm1 = Application::OpenForms["Form1"];
fm1->Text = "text"; //it is work
fm1->Controls["textBox1"]->Text = "text in box"; //is ok
//fm1->Controls["listBox1"]->... what is next ?????

}
};
}
 
P

Peteroid

The controls listBox1 and textBox1 are PRIVATE to class Form1. Hence their
members are inaccessible to instances of class Form2. From inside the
definition of Form1 all its controls are accessible, private or not, so
within Form1 they are 'findable'.

The solution to making the controls you want in Form1 accessible to Form2
(and hence their public methods, such as Add), is making them PUBLIC within
the definition of class Form1 or by writing methods in class Form1 that
expose them in a second-hand way.

Hi

I have a problem with using listBox1. I have a two forms form1 and
form2. In form1 are controls listBox1, textBox1 and button witch
creating object of class Form2. In class Form2 I create a pointer to
object of class Form1. I don't known how to use method add(), where
can I find it. From Form1 I can add value like this this->listBox1-
Items[1]->Add("aaaa"); but from Form2 when I try to get this method
Click to expand...
I cant find it. I have textBox1 on Form1 and I can change text in this
control like this fm1->Controls["textBox1"]->Text = "text in box"; .
But Text is property of class not method like add().

How can I use add() method from the Form2 to listBox in another form?

VS2005Pro, .net Framework 2.0
Below I attach the listening


#Form1##########################################################
#pragma once
#include"Form2.h"


namespace naforum {

using namespace System;
using namespace System::ComponentModel;
using namespace System::Collections;
using namespace System::Windows::Forms;
using namespace System::Data;
using namespace System::Drawing;
public ref class Form1 : public System::Windows::Forms::Form
{
public:
Form1(void)
{
InitializeComponent();
//

//TODO: Add the constructor code here
//
}

protected:
/// <summary>
/// Clean up any resources being used.
/// </summary>
~Form1()
{
if (components)
{
delete components;
}
}
private: System::Windows::Forms::Button^ button1;
public: System::Windows::Forms::ListBox^ listBox1;
private:
public: System::Windows::Forms::TextBox^ textBox1;
protected:



private:
/// <summary>
/// Required designer variable.
/// </summary>
System::ComponentModel::Container ^components;

#pragma region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
void InitializeComponent(void)
{
this->button1 = (gcnew System::Windows::Forms::Button());
this->listBox1 = (gcnew System::Windows::Forms::ListBox());
this->textBox1 = (gcnew System::Windows::Forms::TextBox());
this->SuspendLayout();
//
// button1
//
this->button1->Location = System::Drawing::point(173, 12);
this->button1->Name = L"button1";
this->button1->Size = System::Drawing::Size(75, 23);
this->button1->TabIndex = 0;
this->button1->Text = L"button1";
this->button1->UseVisualStyleBackColor = true;
this->button1->Click += gcnew System::EventHandler(this,
&Form1::button1_Click);
//
// listBox1
//
this->listBox1->FormattingEnabled = true;
this->listBox1->Location = System::Drawing::point(16, 12);
this->listBox1->Name = L"listBox1";
this->listBox1->Size = System::Drawing::Size(120, 95);
this->listBox1->TabIndex = 1;
//
// textBox1
//
this->textBox1->Location = System::Drawing::point(16, 113);
this->textBox1->Name = L"textBox1";
this->textBox1->Size = System::Drawing::Size(100, 20);
this->textBox1->TabIndex = 2;
//
// Form1
//
this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
this->ClientSize = System::Drawing::Size(292, 273);
this->Controls->Add(this->textBox1);
this->Controls->Add(this->listBox1);
this->Controls->Add(this->button1);
this->Name = L"Form1";
this->Text = L"Form1";
this->ResumeLayout(false);
this->PerformLayout();

}
#pragma endregion
private: System::Void button1_Click(System::Object^ sender,
System::EventArgs^ e) {
Form2 ^fm2 = gcnew Form2();
fm2->Show();
this->listBox1->Items[1]->Add("aaaa"); //from this class method
is available
}
};
}

#Form2#####################################################################

#pragma once

using namespace System;
using namespace System::ComponentModel;
using namespace System::Collections;
using namespace System::Windows::Forms;
using namespace System::Data;
using namespace System::Drawing;


namespace naforum {

public ref class Form2 : public System::Windows::Forms::Form
{
public:
Form2(void)
{
InitializeComponent();
//
//TODO: Add the constructor code here
//
}

protected:
/// <summary>
/// Clean up any resources being used.
/// </summary>
~Form2()
{
if (components)
{
delete components;
}
}
private: System::Windows::Forms::Button^ button1;
protected:

private:
/// <summary>
/// Required designer variable.
/// </summary>
System::ComponentModel::Container ^components;

#pragma region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
void InitializeComponent(void)
{
this->button1 = (gcnew System::Windows::Forms::Button());
this->SuspendLayout();
//
// button1
//
this->button1->Location = System::Drawing::point(12, 22);
this->button1->Name = L"button1";
this->button1->Size = System::Drawing::Size(75, 23);
this->button1->TabIndex = 0;
this->button1->Text = L"button1";
this->button1->UseVisualStyleBackColor = true;
this->button1->Click += gcnew System::EventHandler(this,
&Form2::button1_Click);
//
// Form2
//
this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
this->ClientSize = System::Drawing::Size(292, 273);
this->Controls->Add(this->button1);
this->Name = L"Form2";
this->Text = L"Form2";
this->ResumeLayout(false);

}
#pragma endregion
private: System::Void button1_Click(System::Object^ sender,
System::EventArgs^ e) {
Form ^fm1 = Application::OpenForms["Form1"];
fm1->Text = "text"; //it is work
fm1->Controls["textBox1"]->Text = "text in box"; //is ok
//fm1->Controls["listBox1"]->... what is next ?????

}
};
}
Click to expand...
 
P

Peteroid

Woops, my bad. Just noticed you also attached a listing, and indeed the
controls in question are defined as public in Form1.

Peteroid said:
The controls listBox1 and textBox1 are PRIVATE to class Form1. Hence their
members are inaccessible to instances of class Form2. From inside the
definition of Form1 all its controls are accessible, private or not, so
within Form1 they are 'findable'.

The solution to making the controls you want in Form1 accessible to Form2
(and hence their public methods, such as Add), is making them PUBLIC
within the definition of class Form1 or by writing methods in class Form1
that expose them in a second-hand way.

Hi

I have a problem with using listBox1. I have a two forms form1 and
form2. In form1 are controls listBox1, textBox1 and button witch
creating object of class Form2. In class Form2 I create a pointer to
object of class Form1. I don't known how to use method add(), where
can I find it. From Form1 I can add value like this this->listBox1-
Items[1]->Add("aaaa"); but from Form2 when I try to get this method
Click to expand...
I cant find it. I have textBox1 on Form1 and I can change text in this
control like this fm1->Controls["textBox1"]->Text = "text in box"; .
But Text is property of class not method like add().

How can I use add() method from the Form2 to listBox in another form?

VS2005Pro, .net Framework 2.0
Below I attach the listening


#Form1##########################################################
#pragma once
#include"Form2.h"


namespace naforum {

using namespace System;
using namespace System::ComponentModel;
using namespace System::Collections;
using namespace System::Windows::Forms;
using namespace System::Data;
using namespace System::Drawing;
public ref class Form1 : public System::Windows::Forms::Form
{
public:
Form1(void)
{
InitializeComponent();
//

//TODO: Add the constructor code here
//
}

protected:
/// <summary>
/// Clean up any resources being used.
/// </summary>
~Form1()
{
if (components)
{
delete components;
}
}
private: System::Windows::Forms::Button^ button1;
public: System::Windows::Forms::ListBox^ listBox1;
private:
public: System::Windows::Forms::TextBox^ textBox1;
protected:



private:
/// <summary>
/// Required designer variable.
/// </summary>
System::ComponentModel::Container ^components;

#pragma region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
void InitializeComponent(void)
{
this->button1 = (gcnew System::Windows::Forms::Button());
this->listBox1 = (gcnew System::Windows::Forms::ListBox());
this->textBox1 = (gcnew System::Windows::Forms::TextBox());
this->SuspendLayout();
//
// button1
//
this->button1->Location = System::Drawing::point(173, 12);
this->button1->Name = L"button1";
this->button1->Size = System::Drawing::Size(75, 23);
this->button1->TabIndex = 0;
this->button1->Text = L"button1";
this->button1->UseVisualStyleBackColor = true;
this->button1->Click += gcnew System::EventHandler(this,
&Form1::button1_Click);
//
// listBox1
//
this->listBox1->FormattingEnabled = true;
this->listBox1->Location = System::Drawing::point(16, 12);
this->listBox1->Name = L"listBox1";
this->listBox1->Size = System::Drawing::Size(120, 95);
this->listBox1->TabIndex = 1;
//
// textBox1
//
this->textBox1->Location = System::Drawing::point(16, 113);
this->textBox1->Name = L"textBox1";
this->textBox1->Size = System::Drawing::Size(100, 20);
this->textBox1->TabIndex = 2;
//
// Form1
//
this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
this->ClientSize = System::Drawing::Size(292, 273);
this->Controls->Add(this->textBox1);
this->Controls->Add(this->listBox1);
this->Controls->Add(this->button1);
this->Name = L"Form1";
this->Text = L"Form1";
this->ResumeLayout(false);
this->PerformLayout();

}
#pragma endregion
private: System::Void button1_Click(System::Object^ sender,
System::EventArgs^ e) {
Form2 ^fm2 = gcnew Form2();
fm2->Show();
this->listBox1->Items[1]->Add("aaaa"); //from this class method
is available
}
};
}

#Form2#####################################################################

#pragma once

using namespace System;
using namespace System::ComponentModel;
using namespace System::Collections;
using namespace System::Windows::Forms;
using namespace System::Data;
using namespace System::Drawing;


namespace naforum {

public ref class Form2 : public System::Windows::Forms::Form
{
public:
Form2(void)
{
InitializeComponent();
//
//TODO: Add the constructor code here
//
}

protected:
/// <summary>
/// Clean up any resources being used.
/// </summary>
~Form2()
{
if (components)
{
delete components;
}
}
private: System::Windows::Forms::Button^ button1;
protected:

private:
/// <summary>
/// Required designer variable.
/// </summary>
System::ComponentModel::Container ^components;

#pragma region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
void InitializeComponent(void)
{
this->button1 = (gcnew System::Windows::Forms::Button());
this->SuspendLayout();
//
// button1
//
this->button1->Location = System::Drawing::point(12, 22);
this->button1->Name = L"button1";
this->button1->Size = System::Drawing::Size(75, 23);
this->button1->TabIndex = 0;
this->button1->Text = L"button1";
this->button1->UseVisualStyleBackColor = true;
this->button1->Click += gcnew System::EventHandler(this,
&Form2::button1_Click);
//
// Form2
//
this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
this->ClientSize = System::Drawing::Size(292, 273);
this->Controls->Add(this->button1);
this->Name = L"Form2";
this->Text = L"Form2";
this->ResumeLayout(false);

}
#pragma endregion
private: System::Void button1_Click(System::Object^ sender,
System::EventArgs^ e) {
Form ^fm1 = Application::OpenForms["Form1"];
fm1->Text = "text"; //it is work
fm1->Controls["textBox1"]->Text = "text in box"; //is ok
//fm1->Controls["listBox1"]->... what is next ?????

}
};
}
Click to expand...
Click to expand...
 
L

lukasmazur

I have access to form because I can change value of textBox: fm1-
Controls["textBox1"]->Text;
Click to expand...
But I don't know how I can use method add() from another form fm1-
Controls["listBox1"]->... what is next ?????
Click to expand...
I tray do this similar like this->listBox1->Items->Add("aaaa"); But
when I try do this using pointer I cant find it : fm1-
Controls["listBox1"]-> (what I mast do next??), there is not option
Click to expand...
"Items".



Woops, my bad. Just noticed you also attached a listing, and indeed the
controls in question are defined as public in Form1.


The controls listBox1 and textBox1 are PRIVATE to class Form1. Hence their
members are inaccessible to instances of class Form2. From inside the
definition of Form1 all its controls are accessible, private or not, so
within Form1 they are 'findable'.
Click to expand...
The solution to making the controls you want in Form1 accessible to Form2
(and hence their public methods, such as Add), is making them PUBLIC
within the definition of class Form1 or by writing methods in class Form1
that expose them in a second-hand way.
Click to expand...
Hi
I have a problem with using listBox1. I have a two forms form1 and
form2. In form1 are controls listBox1, textBox1 and button witch
creating object of class Form2. In class Form2 I create a pointer to
object of class Form1. I don't known how to use method add(), where
can I find it. From Form1 I can add value like this this->listBox1-
Items[1]->Add("aaaa"); but from Form2 when I try to get this method
I cant find it. I have textBox1 on Form1 and I can change text in this
control like this fm1->Controls["textBox1"]->Text = "text in box"; .
But Text is property of class not method like add().
How can I use add() method from the Form2 to listBox in another form?
VS2005Pro, .net Framework 2.0
Below I attach the listening
#Form1##########################################################
#pragma once
#include"Form2.h"
namespace naforum {
using namespace System;
using namespace System::ComponentModel;
using namespace System::Collections;
using namespace System::Windows::Forms;
using namespace System::Data;
using namespace System::Drawing;
public ref class Form1 : public System::Windows::Forms::Form
{
public:
Form1(void)
{
InitializeComponent();
//
//TODO: Add the constructor code here
//
}
protected:
/// <summary>
/// Clean up any resources being used.
/// </summary>
~Form1()
{
if (components)
{
delete components;
}
}
private: System::Windows::Forms::Button^ button1;
public: System::Windows::Forms::ListBox^ listBox1;
private:
public: System::Windows::Forms::TextBox^ textBox1;
protected:
private:
/// <summary>
/// Required designer variable.
/// </summary>
System::ComponentModel::Container ^components;
#pragma region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
void InitializeComponent(void)
{
this->button1 = (gcnew System::Windows::Forms::Button());
this->listBox1 = (gcnew System::Windows::Forms::ListBox());
this->textBox1 = (gcnew System::Windows::Forms::TextBox());
this->SuspendLayout();
//
// button1
//
this->button1->Location = System::Drawing::point(173, 12);
this->button1->Name = L"button1";
this->button1->Size = System::Drawing::Size(75, 23);
this->button1->TabIndex = 0;
this->button1->Text = L"button1";
this->button1->UseVisualStyleBackColor = true;
this->button1->Click += gcnew System::EventHandler(this,
&Form1::button1_Click);
//
// listBox1
//
this->listBox1->FormattingEnabled = true;
this->listBox1->Location = System::Drawing::point(16, 12);
this->listBox1->Name = L"listBox1";
this->listBox1->Size = System::Drawing::Size(120, 95);
this->listBox1->TabIndex = 1;
//
// textBox1
//
this->textBox1->Location = System::Drawing::point(16, 113);
this->textBox1->Name = L"textBox1";
this->textBox1->Size = System::Drawing::Size(100, 20);
this->textBox1->TabIndex = 2;
//
// Form1
//
this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
this->ClientSize = System::Drawing::Size(292, 273);
this->Controls->Add(this->textBox1);
this->Controls->Add(this->listBox1);
this->Controls->Add(this->button1);
this->Name = L"Form1";
this->Text = L"Form1";
this->ResumeLayout(false);
this->PerformLayout();
}
#pragma endregion
private: System::Void button1_Click(System::Object^ sender,
System::EventArgs^ e) {
Form2 ^fm2 = gcnew Form2();
fm2->Show();
this->listBox1->Items[1]->Add("aaaa"); //from this class method
is available
}
};
}
#Form2#####################################################################
#pragma once
using namespace System;
using namespace System::ComponentModel;
using namespace System::Collections;
using namespace System::Windows::Forms;
using namespace System::Data;
using namespace System::Drawing;
namespace naforum {
public ref class Form2 : public System::Windows::Forms::Form
{
public:
Form2(void)
{
InitializeComponent();
//
//TODO: Add the constructor code here
//
}
protected:
/// <summary>
/// Clean up any resources being used.
/// </summary>
~Form2()
{
if (components)
{
delete components;
}
}
private: System::Windows::Forms::Button^ button1;
protected:
private:
/// <summary>
/// Required designer variable.
/// </summary>
System::ComponentModel::Container ^components;
#pragma region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
void InitializeComponent(void)
{
this->button1 = (gcnew System::Windows::Forms::Button());
this->SuspendLayout();
//
// button1
//
this->button1->Location = System::Drawing::point(12, 22);
this->button1->Name = L"button1";
this->button1->Size = System::Drawing::Size(75, 23);
this->button1->TabIndex = 0;
this->button1->Text = L"button1";
this->button1->UseVisualStyleBackColor = true;
this->button1->Click += gcnew System::EventHandler(this,
&Form2::button1_Click);
//
// Form2
//
this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
this->ClientSize = System::Drawing::Size(292, 273);
this->Controls->Add(this->button1);
this->Name = L"Form2";
this->Text = L"Form2";
this->ResumeLayout(false);
}
#pragma endregion
private: System::Void button1_Click(System::Object^ sender,
System::EventArgs^ e) {
Form ^fm1 = Application::OpenForms["Form1"];
fm1->Text = "text"; //it is work
fm1->Controls["textBox1"]->Text = "text in box"; //is ok
//fm1->Controls["listBox1"]->... what is next ?????
}
};
}
Click to expand...
Click to expand...
Click to expand...
 
L

lukasmazur

I have access to form because I can change value of textBox: fm1-
Controls["textBox1"]->Text;
Click to expand...
But I don't know how I can use method add() from another form fm1-
Controls["listBox1"]->... what is next ?????
Click to expand...
I tray do this similar like this->listBox1->Items->Add("aaaa"); But
when I try do this using pointer I cant find it : fm1-
Controls["listBox1"]-> (what I mast do next??), there is not option
Click to expand...
"Items".



Woops, my bad. Just noticed you also attached a listing, and indeed the
controls in question are defined as public in Form1.


The controls listBox1 and textBox1 are PRIVATE to class Form1. Hence their
members are inaccessible to instances of class Form2. From inside the
definition of Form1 all its controls are accessible, private or not, so
within Form1 they are 'findable'.
Click to expand...
The solution to making the controls you want in Form1 accessible to Form2
(and hence their public methods, such as Add), is making them PUBLIC
within the definition of class Form1 or by writing methods in class Form1
that expose them in a second-hand way.
Click to expand...
Hi
I have a problem with using listBox1. I have a two forms form1 and
form2. In form1 are controls listBox1, textBox1 and button witch
creating object of class Form2. In class Form2 I create a pointer to
object of class Form1. I don't known how to use method add(), where
can I find it. From Form1 I can add value like this this->listBox1-
Items[1]->Add("aaaa"); but from Form2 when I try to get this method
I cant find it. I have textBox1 on Form1 and I can change text in this
control like this fm1->Controls["textBox1"]->Text = "text in box"; .
But Text is property of class not method like add().
How can I use add() method from the Form2 to listBox in another form?
VS2005Pro, .net Framework 2.0
Below I attach the listening
#Form1##########################################################
#pragma once
#include"Form2.h"
namespace naforum {
using namespace System;
using namespace System::ComponentModel;
using namespace System::Collections;
using namespace System::Windows::Forms;
using namespace System::Data;
using namespace System::Drawing;
public ref class Form1 : public System::Windows::Forms::Form
{
public:
Form1(void)
{
InitializeComponent();
//
//TODO: Add the constructor code here
//
}
protected:
/// <summary>
/// Clean up any resources being used.
/// </summary>
~Form1()
{
if (components)
{
delete components;
}
}
private: System::Windows::Forms::Button^ button1;
public: System::Windows::Forms::ListBox^ listBox1;
private:
public: System::Windows::Forms::TextBox^ textBox1;
protected:
private:
/// <summary>
/// Required designer variable.
/// </summary>
System::ComponentModel::Container ^components;
#pragma region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
void InitializeComponent(void)
{
this->button1 = (gcnew System::Windows::Forms::Button());
this->listBox1 = (gcnew System::Windows::Forms::ListBox());
this->textBox1 = (gcnew System::Windows::Forms::TextBox());
this->SuspendLayout();
//
// button1
//
this->button1->Location = System::Drawing::point(173, 12);
this->button1->Name = L"button1";
this->button1->Size = System::Drawing::Size(75, 23);
this->button1->TabIndex = 0;
this->button1->Text = L"button1";
this->button1->UseVisualStyleBackColor = true;
this->button1->Click += gcnew System::EventHandler(this,
&Form1::button1_Click);
//
// listBox1
//
this->listBox1->FormattingEnabled = true;
this->listBox1->Location = System::Drawing::point(16, 12);
this->listBox1->Name = L"listBox1";
this->listBox1->Size = System::Drawing::Size(120, 95);
this->listBox1->TabIndex = 1;
//
// textBox1
//
this->textBox1->Location = System::Drawing::point(16, 113);
this->textBox1->Name = L"textBox1";
this->textBox1->Size = System::Drawing::Size(100, 20);
this->textBox1->TabIndex = 2;
//
// Form1
//
this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
this->ClientSize = System::Drawing::Size(292, 273);
this->Controls->Add(this->textBox1);
this->Controls->Add(this->listBox1);
this->Controls->Add(this->button1);
this->Name = L"Form1";
this->Text = L"Form1";
this->ResumeLayout(false);
this->PerformLayout();
}
#pragma endregion
private: System::Void button1_Click(System::Object^ sender,
System::EventArgs^ e) {
Form2 ^fm2 = gcnew Form2();
fm2->Show();
this->listBox1->Items[1]->Add("aaaa"); //from this class method
is available
}
};
}
#Form2#####################################################################
#pragma once
using namespace System;
using namespace System::ComponentModel;
using namespace System::Collections;
using namespace System::Windows::Forms;
using namespace System::Data;
using namespace System::Drawing;
namespace naforum {
public ref class Form2 : public System::Windows::Forms::Form
{
public:
Form2(void)
{
InitializeComponent();
//
//TODO: Add the constructor code here
//
}
protected:
/// <summary>
/// Clean up any resources being used.
/// </summary>
~Form2()
{
if (components)
{
delete components;
}
}
private: System::Windows::Forms::Button^ button1;
protected:
private:
/// <summary>
/// Required designer variable.
/// </summary>
System::ComponentModel::Container ^components;
#pragma region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
void InitializeComponent(void)
{
this->button1 = (gcnew System::Windows::Forms::Button());
this->SuspendLayout();
//
// button1
//
this->button1->Location = System::Drawing::point(12, 22);
this->button1->Name = L"button1";
this->button1->Size = System::Drawing::Size(75, 23);
this->button1->TabIndex = 0;
this->button1->Text = L"button1";
this->button1->UseVisualStyleBackColor = true;
this->button1->Click += gcnew System::EventHandler(this,
&Form2::button1_Click);
//
// Form2
//
this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
this->ClientSize = System::Drawing::Size(292, 273);
this->Controls->Add(this->button1);
this->Name = L"Form2";
this->Text = L"Form2";
this->ResumeLayout(false);
}
#pragma endregion
private: System::Void button1_Click(System::Object^ sender,
System::EventArgs^ e) {
Form ^fm1 = Application::OpenForms["Form1"];
fm1->Text = "text"; //it is work
fm1->Controls["textBox1"]->Text = "text in box"; //is ok
//fm1->Controls["listBox1"]->... what is next ?????
}
};
}
Click to expand...
Click to expand...
Click to expand...
 
L

lukasmazur

I have access to form because I can change value of textBox: fm1->Controls["textBox1"]->Text;

But I don't know how I can use method add() from another form fm1->Controls["listBox1"]->... what is next ?????

I tray do this similar like this->listBox1->Items->Add("aaaa"); But
when I try do this using pointer I cant find it : fm1->Controls["listBox1"]-> (what I mast do next??), there is not option

"Items".

Woops, my bad. Just noticed you also attached a listing, and indeed the
controls in question are defined as public in Form1.
Click to expand...
news:[email protected]...
Click to expand...
The controls listBox1 and textBox1 are PRIVATE to class Form1. Hence their
members are inaccessible to instances of class Form2. From inside the
definition of Form1 all its controls are accessible, private or not, so
within Form1 they are 'findable'.
The solution to making the controls you want in Form1 accessible to Form2
(and hence their public methods, such as Add), is making them PUBLIC
within the definition of class Form1 or by writing methods in class Form1
that expose them in a second-hand way.
Hi
I have a problem with using listBox1. I have a two forms form1 and
form2. In form1 are controls listBox1, textBox1 and button witch
creating object of class Form2. In class Form2 I create a pointer to
object of class Form1. I don't known how to use method add(), where
can I find it. From Form1 I can add value like this this->listBox1-
Items[1]->Add("aaaa"); but from Form2 when I try to get this method
I cant find it. I have textBox1 on Form1 and I can change text in this
control like this fm1->Controls["textBox1"]->Text = "text in box"; .
But Text is property of class not method like add().
How can I use add() method from the Form2 to listBox in another form?
VS2005Pro, .net Framework 2.0
Below I attach the listening
#Form1##########################################################
#pragma once
#include"Form2.h"
namespace naforum {
using namespace System;
using namespace System::ComponentModel;
using namespace System::Collections;
using namespace System::Windows::Forms;
using namespace System::Data;
using namespace System::Drawing;
public ref class Form1 : public System::Windows::Forms::Form
{
public:
Form1(void)
{
InitializeComponent();
//
//TODO: Add the constructor code here
//
}
protected:
/// <summary>
/// Clean up any resources being used.
/// </summary>
~Form1()
{
if (components)
{
delete components;
}
}
private: System::Windows::Forms::Button^ button1;
public: System::Windows::Forms::ListBox^ listBox1;
private:
public: System::Windows::Forms::TextBox^ textBox1;
protected:
private:
/// <summary>
/// Required designer variable.
/// </summary>
System::ComponentModel::Container ^components;
#pragma region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
void InitializeComponent(void)
{
this->button1 = (gcnew System::Windows::Forms::Button());
this->listBox1 = (gcnew System::Windows::Forms::ListBox());
this->textBox1 = (gcnew System::Windows::Forms::TextBox());
this->SuspendLayout();
//
// button1
//
this->button1->Location = System::Drawing::point(173, 12);
this->button1->Name = L"button1";
this->button1->Size = System::Drawing::Size(75, 23);
this->button1->TabIndex = 0;
this->button1->Text = L"button1";
this->button1->UseVisualStyleBackColor = true;
this->button1->Click += gcnew System::EventHandler(this,
&Form1::button1_Click);
//
// listBox1
//
this->listBox1->FormattingEnabled = true;
this->listBox1->Location = System::Drawing::point(16, 12);
this->listBox1->Name = L"listBox1";
this->listBox1->Size = System::Drawing::Size(120, 95);
this->listBox1->TabIndex = 1;
//
// textBox1
//
this->textBox1->Location = System::Drawing::point(16, 113);
this->textBox1->Name = L"textBox1";
this->textBox1->Size = System::Drawing::Size(100, 20);
this->textBox1->TabIndex = 2;
//
// Form1
//
this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
this->ClientSize = System::Drawing::Size(292, 273);
this->Controls->Add(this->textBox1);
this->Controls->Add(this->listBox1);
this->Controls->Add(this->button1);
this->Name = L"Form1";
this->Text = L"Form1";
this->ResumeLayout(false);
this->PerformLayout();
}
#pragma endregion
private: System::Void button1_Click(System::Object^ sender,
System::EventArgs^ e) {
Form2 ^fm2 = gcnew Form2();
fm2->Show();
this->listBox1->Items[1]->Add("aaaa"); //from this class method
is available
}
};
}
#Form2#####################################################################
#pragma once
using namespace System;
using namespace System::ComponentModel;
using namespace System::Collections;
using namespace System::Windows::Forms;
using namespace System::Data;
using namespace System::Drawing;
namespace naforum {
public ref class Form2 : public System::Windows::Forms::Form
{
public:
Form2(void)
{
InitializeComponent();
//
//TODO: Add the constructor code here
//
}
protected:
/// <summary>
/// Clean up any resources being used.
/// </summary>
~Form2()
{
if (components)
{
delete components;
}
}
private: System::Windows::Forms::Button^ button1;
protected:
private:
/// <summary>
/// Required designer variable.
/// </summary>
System::ComponentModel::Container ^components;
#pragma region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
void InitializeComponent(void)
{
this->button1 = (gcnew System::Windows::Forms::Button());
this->SuspendLayout();
//
// button1
//
this->button1->Location = System::Drawing::point(12, 22);
this->button1->Name = L"button1";
this->button1->Size = System::Drawing::Size(75, 23);
this->button1->TabIndex = 0;
this->button1->Text = L"button1";
this->button1->UseVisualStyleBackColor = true;
this->button1->Click += gcnew System::EventHandler(this,
&Form2::button1_Click);
//
// Form2
//
this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
this->ClientSize = System::Drawing::Size(292, 273);
this->Controls->Add(this->button1);
this->Name = L"Form2";
this->Text = L"Form2";
this->ResumeLayout(false);
}
#pragma endregion
private: System::Void button1_Click(System::Object^ sender,
System::EventArgs^ e) {
Form ^fm1 = Application::OpenForms["Form1"];
fm1->Text = "text"; //it is work
fm1->Controls["textBox1"]->Text = "text in box"; //is ok
//fm1->Controls["listBox1"]->... what is next ?????
}
};
}
Click to expand...
Click to expand...
Click to expand...



When I try do this similar in c# I made this easily.

Below listening:

#Form1##############################################
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace chas
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

private void button1_Click(object sender, EventArgs e)
{
Form2 form2 = new Form2();
form2.Show();
}
}
}

#Form2############################################################

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace chas
{
public partial class Form2 : Form
{
public Form2()
{
InitializeComponent();
}

private void button1_Click(object sender, EventArgs e)
{

Form1 form1 =(Form1)Application.OpenForms["Form1"];
form1.listBox1.Items.Add("one record in listBox");
}
}
}
 

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