How to use a List Box as a selector for data to show in another txtbox

[Sophia Olivas]

I am relatively new to the C++ world - I am working on a form control that is supposed to use a List box to pull a value out of an array of values and display it in a text box.

This is way above my head, but I want to figure it out.

Here is my task:

1-Write a program for Eddies Equipment Rental
2-Build a windows form that looks like this:

3-Eddie Charges one amount for full day rentals and another amout for half days.
4-Use 3 parallel arrays to store the data
Data is as follows:

5-Load the list box during the form load (optional)
6-The user should click on the item in the list box to select the equipment GOT THIS
7-the user must enter an f or h for full or half day GOT THIS

8-the Display Charge button will display the approrpiate amount in the rental charge text box I really need help with this.

the Clear button will clear the 2 text boxes GOT THIS

I have the form built - and the clear button working.

I have the listbox issueing values based on selection - but don't know how to put that data in to an array that is also getting data from the Duration Text box. I actually am not sure how to get the data outside the function itself. To use it with the click function of the Dsiplay Button.

I got the txtDuration to validate input - and it uses a message box to alert the user if they input the wrong thing. Though the built in error handler is a bit annoyoing - if you hit the backspace the program throws another error message box - that I didn't program, would like to turn that off. it tells you that you must have exactly one character - which is not necresary.


Alot of the problem I am having is that I don't know where to put stuff - when there is already a ton of code generated that I don't understand.

Any help would be greatly appreciated.

code for form that I have already is below:

#pragma once
 
namespace Final {
 
    using namespace System;
    using namespace System::ComponentModel;
    using namespace System::Collections;
    using namespace System::Windows::Forms;
    using namespace System::Data;
    using namespace System::Drawing;
 
    /// <summary>
    /// Summary for Form1
    /// </summary>
    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::ListBox^  lstEquipment;
    protected: 
    private: System::Windows::Forms::Label^  lblDuration;
    private: System::Windows::Forms::TextBox^  txtDuration;
    private: System::Windows::Forms::Label^  lblCharge;
    private: System::Windows::Forms::TextBox^  txtCharge;
    private: System::Windows::Forms::Button^  btnDisplay;
    private: System::Windows::Forms::Button^  btnClear;
    private: System::Windows::Forms::Label^  lblInstruction;
 
    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->lstEquipment = (gcnew System::Windows::Forms::ListBox());
            this->lblDuration = (gcnew System::Windows::Forms::Label());
            this->txtDuration = (gcnew System::Windows::Forms::TextBox());
            this->lblCharge = (gcnew System::Windows::Forms::Label());
            this->txtCharge = (gcnew System::Windows::Forms::TextBox());
            this->btnDisplay = (gcnew System::Windows::Forms::Button());
            this->btnClear = (gcnew System::Windows::Forms::Button());
            this->lblInstruction = (gcnew System::Windows::Forms::Label());
            this->SuspendLayout();
            // 
            // lstEquipment
            // 
            this->lstEquipment->FormattingEnabled = true;
            this->lstEquipment->Items->AddRange(gcnew cli::array< System::Object^  >(3) {L"1- Rug Cleaner", L"2- Lawn Mower", L"3- Paint Sprayer"});
            this->lstEquipment->Location = System::Drawing::Point(95, 46);
            this->lstEquipment->Name = L"lstEquipment";
            this->lstEquipment->Size = System::Drawing::Size(158, 56);
            this->lstEquipment->TabIndex = 1;
            this->lstEquipment->SelectedIndexChanged += gcnew System::EventHandler(this, &Form1::Item_Selected);
            // 
            // lblDuration
            // 
            this->lblDuration->AutoSize = true;
            this->lblDuration->Location = System::Drawing::Point(92, 154);
            this->lblDuration->Name = L"lblDuration";
            this->lblDuration->Size = System::Drawing::Size(130, 13);
            this->lblDuration->TabIndex = 2;
            this->lblDuration->Text = L"Select a Duration (F or H):";
            // 
            // txtDuration
            // 
            this->txtDuration->Location = System::Drawing::Point(228, 150);
            this->txtDuration->Name = L"txtDuration";
            this->txtDuration->Size = System::Drawing::Size(34, 20);
            this->txtDuration->TabIndex = 3;
            this->txtDuration->TextChanged += gcnew System::EventHandler(this, &Form1::Input_Duration);
            // 
            // lblCharge
            // 
            this->lblCharge->AutoSize = true;
            this->lblCharge->Location = System::Drawing::Point(92, 179);
            this->lblCharge->Name = L"lblCharge";
            this->lblCharge->Size = System::Drawing::Size(78, 13);
            this->lblCharge->TabIndex = 4;
            this->lblCharge->Text = L"Rental Charge:";
            // 
            // txtCharge
            // 
            this->txtCharge->Location = System::Drawing::Point(176, 176);
            this->txtCharge->Name = L"txtCharge";
            this->txtCharge->Size = System::Drawing::Size(86, 20);
            this->txtCharge->TabIndex = 5;
            // 
            // btnDisplay
            // 
            this->btnDisplay->Location = System::Drawing::Point(74, 217);
            this->btnDisplay->Name = L"btnDisplay";
            this->btnDisplay->Size = System::Drawing::Size(75, 23);
            this->btnDisplay->TabIndex = 6;
            this->btnDisplay->Text = L"Display Charge";
            this->btnDisplay->UseVisualStyleBackColor = true;
            this->btnDisplay->Click += gcnew System::EventHandler(this, &Form1::Display_Charge);
            // 
            // btnClear
            // 
            this->btnClear->Location = System::Drawing::Point(221, 217);
            this->btnClear->Name = L"btnClear";
            this->btnClear->Size = System::Drawing::Size(75, 23);
            this->btnClear->TabIndex = 7;
            this->btnClear->Text = L"Clear";
            this->btnClear->UseVisualStyleBackColor = true;
            this->btnClear->Click += gcnew System::EventHandler(this, &Form1::ClearInput);
            // 
            // lblInstruction
            // 
            this->lblInstruction->AutoSize = true;
            this->lblInstruction->Location = System::Drawing::Point(105, 30);
            this->lblInstruction->Name = L"lblInstruction";
            this->lblInstruction->Size = System::Drawing::Size(124, 13);
            this->lblInstruction->TabIndex = 8;
            this->lblInstruction->Text = L"Click on the Item to Rent";
            // 
            // Form1
            // 
            this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
            this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
            this->ClientSize = System::Drawing::Size(359, 264);
            this->Controls->Add(this->lblInstruction);
            this->Controls->Add(this->btnClear);
            this->Controls->Add(this->btnDisplay);
            this->Controls->Add(this->txtCharge);
            this->Controls->Add(this->lblCharge);
            this->Controls->Add(this->txtDuration);
            this->Controls->Add(this->lblDuration);
            this->Controls->Add(this->lstEquipment);
            this->Name = L"Form1";
            this->Text = L"Eddies Equipment Rental";
            this->ResumeLayout(false);
            this->PerformLayout();
 
        }
#pragma endregion
    private: System::Void ClearInput(System::Object^  sender, System::EventArgs^  e) 
             {
                 txtDuration->Clear();
                 txtCharge->Clear();
 
             }
private: System::Void Item_Selected(System::Object^  sender, System::EventArgs^  e) 
         {
             int Item;
             if(lstEquipment->SelectedIndex==0)
                 Item=1;
             else if(lstEquipment->SelectedIndex==1)
                Item=2;
             else
                Item=3;
         }
private: System::Void Input_Duration(System::Object^  sender, System::EventArgs^  e) 
         {
             int Duration;
             wchar_t convertDuration;
             convertDuration = System::Convert::ToChar(txtDuration->Text);
             if(txtDuration->Text=="F" || txtDuration->Text=="f")
                 Duration=1;
             else if(txtDuration->Text=="H" || txtDuration->Text=="h")
                 Duration=2;
             else
                 MessageBox::Show("Your Entry Must be 'F' for Full Day or 'H' for Half Day","Input Error", MessageBoxButtons::OKCancel,MessageBoxIcon::Asterisk);
 
 
         }
private: System::Void Display_Charge(System::Object^  sender, System::EventArgs^  e) 
         {
 
         }
};
}