Using Radio Buttons
 

This exercise combines labels, panels, radio buttons, and text boxes to create an application. It illustrates how to use radio buttons as regular buttons

Prerequisites:
Panel
Button
Scroll Bars
Using Radio Buttons
  1. Start Microsoft Visual Studio .NET
  2. On the Start Page, click New Project (alternatively, on the main menu, you can click File -> New -> Project...)
  3. On the New Project dialog box, in the Project Types tree list, click Visual C++ Projects
  4. In the Templates list, click Managed C++ Empty Project
  5. In the Name edit box, replace the <Enter name> content with Calculate
  6. In the Location combo box, accept the suggestion or type your own. If you don't have any, type C:\Programs\MSVC.NET
  7. Click OK
  8. On the main menu, click Project -> Add New Item...
  9. In the Add New Item dialog box, in the Templates list, click C++ File
  10. In the Name box, replace <Enter name> with Main and click OK
  11. Replace the contents of the empty file with the following:
      
    #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 SimpleForm : public Form
{
public:
	SimpleForm();
private:
	PictureBox  *pctNumbers;
	PictureBox  *pctOperators;
	Label		*lblNumber1;
	TextBox		*txtNumber1;
	Label		*lblNumber2;
	TextBox		*txtNumber2;
	Label		*lblResult;
	TextBox		*txtResult;

	RadioButton	*rdoAddition;
	RadioButton	*rdoSubtraction;
	RadioButton *rdoMultiplication;
	RadioButton *rdoDivision;

	void AdditionClick(Object *Sender, EventArgs *Args);
	void SubtractionClick(Object *Sender, EventArgs *Args);
	void MultiplicationClick(Object *Sender, EventArgs *Args);
	void DivisionClick(Object *Sender, EventArgs *Args);

	void CreateTheControls();
};

SimpleForm::SimpleForm()
{
	this->Text = "Using Radio Buttons";
	this->Size = Drawing::Size(385, 190);
	this->MinimizeBox = false;
	this->MaximizeBox = false;
	this->FormBorderStyle = FormBorderStyle::FixedDialog;

	CreateTheControls();
}

void SimpleForm::CreateTheControls()
{
	pctNumbers = new PictureBox;
	pctNumbers->BorderStyle = BorderStyle::Fixed3D;
	pctNumbers->Location = Point(16, 16);
	pctNumbers->Size = Drawing::Size(200, 125);
	Controls->Add(pctNumbers);

	lblNumber1 = new Label;
	lblNumber1->AutoSize = true;
	lblNumber1->Location = Point(16, 30);
	lblNumber1->Text = S"Number &1:";
	this->pctNumbers->Controls->Add(lblNumber1);

	txtNumber1 = new TextBox;
	txtNumber1->Location = Point(100, 24);
	txtNumber1->Size = Drawing::Size(84, 16);
	txtNumber1->Text = "0.00";
	txtNumber1->TextAlign =  System::Windows::Forms::HorizontalAlignment::Right;
	this->pctNumbers->Controls->Add(txtNumber1);

	lblNumber2 = new Label;
	lblNumber2->AutoSize = true;
	lblNumber2->Location = Point(16, 54);
	lblNumber2->Text = S"Number &2:";
	this->pctNumbers->Controls->Add(lblNumber2);

	txtNumber2 = new TextBox;
	txtNumber2->Location = Point(100, 48);
	txtNumber2->Size = Drawing::Size(84, 16);
	txtNumber2->Text = "1.00";
	txtNumber2->TextAlign =  System::Windows::Forms::HorizontalAlignment::Right;
	this->pctNumbers->Controls->Add(txtNumber2);

	lblResult = new Label;
	lblResult->AutoSize = true;
	lblResult->Location = Point(16, 76);
	lblResult->Text = S"Result:";
	this->pctNumbers->Controls->Add(lblResult);

	txtResult = new TextBox;
	txtResult->Location = Point(100, 72);
	txtResult->Size = Drawing::Size(84, 16);
	this->pctNumbers->Controls->Add(txtResult);

	pctOperators = new PictureBox;
	pctOperators->BorderStyle = BorderStyle::Fixed3D;
	pctOperators->Location = Point(220, 16);
	pctOperators->Size = Drawing::Size(140, 125);

	rdoAddition = new RadioButton;
	rdoAddition->Location = Point(16, 16);
	rdoAddition->CheckAlign = Drawing::ContentAlignment::MiddleRight;
	rdoAddition->Text = S"&Addition";
	rdoAddition->add_Click(new EventHandler(this, AdditionClick));
	pctOperators->Controls->Add(rdoAddition);

	rdoSubtraction = new RadioButton;
	rdoSubtraction->Location = Point(16, 40);
	rdoSubtraction->CheckAlign = Drawing::ContentAlignment::MiddleRight;
	rdoSubtraction->Text = S"&Subtraction";
	rdoSubtraction->add_Click(new EventHandler(this, SubtractionClick));
	pctOperators->Controls->Add(rdoSubtraction);

	rdoMultiplication = new RadioButton;
	rdoMultiplication->Location = Point(16, 64);
	rdoMultiplication->CheckAlign = Drawing::ContentAlignment::MiddleRight;
	rdoMultiplication->Text = S"&Multiplication";
	rdoMultiplication->add_Click(new EventHandler(this, MultiplicationClick));
	pctOperators->Controls->Add(rdoMultiplication);

	rdoDivision = new RadioButton;
	rdoDivision->Location = Point(16, 88);
	rdoDivision->CheckAlign = Drawing::ContentAlignment::MiddleRight;
	rdoDivision->Text = S"&Division";
	rdoDivision->add_Click(new EventHandler(this, DivisionClick));
	pctOperators->Controls->Add(rdoDivision);

	Controls->Add(pctOperators);
}

void SimpleForm::AdditionClick(Object *Sender, EventArgs *Args)
{
	double Number1, Number2, Result;

	try {
		Number1 = Convert::ToDouble(txtNumber1->Text);
		Number2 = Convert::ToDouble(txtNumber2->Text);

		Result = Number1 + Number2;
		txtResult->Text = Result.ToString();
	}
	catch(System::FormatException *fmtE)
	{
		MessageBox::Show(fmtE->Message);
	}
}

void SimpleForm::SubtractionClick(Object *Sender, EventArgs *Args)
{
	double Number1, Number2, Result;

	try {
		Number1 = Convert::ToDouble(txtNumber1->Text);
		Number2 = Convert::ToDouble(txtNumber2->Text);

		Result = Number1 - Number2;
		txtResult->Text = Result.ToString();
	}
	catch(System::FormatException *fmtE)
	{
		MessageBox::Show(fmtE->Message);
	}
}

void SimpleForm::MultiplicationClick(Object *Sender, EventArgs *Args)
{
	double Number1, Number2, Result;

	try {
		Number1 = Convert::ToDouble(txtNumber1->Text);
		Number2 = Convert::ToDouble(txtNumber2->Text);

		Result = Number1 * Number2;
		txtResult->Text = Result.ToString();
	}
	catch(System::FormatException *fmtE)
	{
		MessageBox::Show(fmtE->Message);
	}
}

void SimpleForm::DivisionClick(Object *Sender, EventArgs *Args)
{
	double Number1, Number2, Result;

	try {
		Number1 = Convert::ToDouble(txtNumber1->Text);
		Number2 = Convert::ToDouble(txtNumber2->Text);

		Result = Number1 / Number2;
		txtResult->Text = Result.ToString();
	}
	catch(System::FormatException *fmtE)
	{
		MessageBox::Show(fmtE->Message);
	}
}

int __stdcall WinMain()
{
	SimpleForm * FM = new SimpleForm();
	Application::Run(FM);

	return 0;
}
  12. Test the application.

 
 
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