Question

***IN C# ONLY, USING WINDOWS FORMS*** --NO JAVA--.

Create a GUI application in C# that calculates and displays the total travel expenses of a business person on a trip. Here is the information that the user must provide:

• Number of days on the trip • Amount of airfare, if any

• Amount of car rental fees, if any

• Number of miles driven, if a private vehicle was used

• Amount of parking fees, if any

• Amount of taxi charges, if any

• Conference or seminar registration fees, if any

• Lodging charges, per night

The company reimburses travel expenses according to the following policy:

• $37 per day for meals

• Parking fees, up to $10.00 per day

• Taxi charges up to $20.00 per day

• Lodging charges up to $95.00 per day

• If a private vehicle is used, $0.27 per mile driven.

The application should calculate and display the following:

• Total expenses incurred by the businessperson

• The total allowable expenses for the trip

• The excess that must be paid by the businessperson, if any

• The amount saved by the businessperson if the expenses were under the total allowed

Answer 1

In case of any query do comment. Thanks

Code:

=======ExpenseForm.cs========

using System;
using System.Windows.Forms;

namespace CalculateTravelExpense
{
    public partial class ExpenseForm : Form
    {
        const double PerDayMeal = 37.00;
        const double PerDayParking = 10.00;
        const double PerDayTaxi = 20.00;
        const double PerDayLodgingCharge = 95.00;
        const double CostPerMile = 0.27;
        int days = 0;
        double airfareAmount = 0.0;
        double carRentalAmount = 0.0;
        double parkingAmount = 0.0;
        double taxiCharge = 0.0;
        double conferenceFees = 0.0;
        double lodgingCharge = 0.0;
        double miles = 0.0;
        double totalExpense = 0.0;
        double allowableExpense = 0.0;
        double excessExpense = 0.0;

        public ExpenseForm()
        {
            InitializeComponent();
        }


        /// <summary>
        /// handles click of calculate button
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnCalculate_Click(object sender, EventArgs e)
        {
            //load values from text box to variables
            days = int.Parse(txtDayTrip.Text);
            airfareAmount = double.Parse(txtAirfareAmount.Text);
            carRentalAmount = double.Parse(txtCarRentalFees.Text);
            miles = double.Parse(txtMiles.Text);
            parkingAmount = double.Parse(txtParking.Text);
            taxiCharge = double.Parse(txtTaxiCharge.Text);
            conferenceFees = double.Parse(txtConferenceFees.Text);
            lodgingCharge = double.Parse(txtLodgingFees.Text);

            //expenses incurred by business man
            totalExpense = airfareAmount + carRentalAmount + (miles * CostPerMile) + parkingAmount + taxiCharge + conferenceFees + lodgingCharge;

            //allowable expense as given, airfare will be considered as one time and it would be allowed
            allowableExpense = airfareAmount + (PerDayMeal + PerDayParking + PerDayTaxi + PerDayLodgingCharge) * days + (miles * CostPerMile);

            txtTotalExpenses.Text = totalExpense.ToString("C");
            txtAllowedExpenses.Text = allowableExpense.ToString("C");
            excessExpense = totalExpense - allowableExpense;
            //calculate excess expense if any, if excess expense is greater than 0 then business man has to pay otherwise he saved the amount
            if (excessExpense > 0)
            {
                txtExcessAmount.Text = excessExpense.ToString("C");
                txtSavedAmount.Clear();
            }
            else
            {
                txtSavedAmount.Text = (excessExpense * -1).ToString("C");
                txtExcessAmount.Clear();
            }
        }

        private void btnExit_Click(object sender, EventArgs e)
        {
            this.Close();
        }

        private void btnReset_Click(object sender, EventArgs e)
        {
            txtDayTrip.Clear();
            txtAirfareAmount.Clear();
            txtCarRentalFees.Clear();
            txtConferenceFees.Clear();
            txtAllowedExpenses.Clear();
            txtExcessAmount.Clear();
            txtLodgingFees.Clear();
            txtMiles.Clear();
            txtParking.Clear();
            txtSavedAmount.Clear();
            txtTaxiCharge.Clear();
            txtTotalExpenses.Clear();
        }



    }
}

=========ExpenseForm.Designer.cs=============

namespace CalculateTravelExpense
{
    partial class ExpenseForm
    {
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #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>
        private void InitializeComponent()
        {
            this.lblDays = new System.Windows.Forms.Label();
            this.lblAirfare = new System.Windows.Forms.Label();
            this.lblCar = new System.Windows.Forms.Label();
            this.lblMiles = new System.Windows.Forms.Label();
            this.lblParking = new System.Windows.Forms.Label();
            this.lblTaxi = new System.Windows.Forms.Label();
            this.lblSeminar = new System.Windows.Forms.Label();
            this.lblLodging = new System.Windows.Forms.Label();
            this.txtDayTrip = new System.Windows.Forms.TextBox();
            this.txtAirfareAmount = new System.Windows.Forms.TextBox();
            this.txtCarRentalFees = new System.Windows.Forms.TextBox();
            this.txtMiles = new System.Windows.Forms.TextBox();
            this.txtParking = new System.Windows.Forms.TextBox();
            this.txtTaxiCharge = new System.Windows.Forms.TextBox();
            this.txtConferenceFees = new System.Windows.Forms.TextBox();
            this.txtLodgingFees = new System.Windows.Forms.TextBox();
            this.lblExpense = new System.Windows.Forms.Label();
            this.lblAllowedExpense = new System.Windows.Forms.Label();
            this.label11 = new System.Windows.Forms.Label();
            this.label12 = new System.Windows.Forms.Label();
            this.txtTotalExpenses = new System.Windows.Forms.TextBox();
            this.txtAllowedExpenses = new System.Windows.Forms.TextBox();
            this.txtExcessAmount = new System.Windows.Forms.TextBox();
            this.txtSavedAmount = new System.Windows.Forms.TextBox();
            this.btnCalculate = new System.Windows.Forms.Button();
            this.btnReset = new System.Windows.Forms.Button();
            this.btnExit = new System.Windows.Forms.Button();
            this.SuspendLayout();
            // 
            // lblDays
            // 
            this.lblDays.AutoSize = true;
            this.lblDays.Location = new System.Drawing.Point(130, 54);
            this.lblDays.Name = "lblDays";
            this.lblDays.Size = new System.Drawing.Size(84, 13);
            this.lblDays.TabIndex = 0;
            this.lblDays.Text = "Days on the trip:";
            // 
            // lblAirfare
            // 
            this.lblAirfare.AutoSize = true;
            this.lblAirfare.Location = new System.Drawing.Point(135, 83);
            this.lblAirfare.Name = "lblAirfare";
            this.lblAirfare.Size = new System.Drawing.Size(79, 13);
            this.lblAirfare.TabIndex = 1;
            this.lblAirfare.Text = "Airfare Amount:";
            // 
            // lblCar
            // 
            this.lblCar.AutoSize = true;
            this.lblCar.Location = new System.Drawing.Point(136, 110);
            this.lblCar.Name = "lblCar";
            this.lblCar.Size = new System.Drawing.Size(78, 13);
            this.lblCar.TabIndex = 2;
            this.lblCar.Text = "Car rental fees:";
            // 
            // lblMiles
            // 
            this.lblMiles.AutoSize = true;
            this.lblMiles.Location = new System.Drawing.Point(148, 140);
            this.lblMiles.Name = "lblMiles";
            this.lblMiles.Size = new System.Drawing.Size(66, 13);
            this.lblMiles.TabIndex = 3;
            this.lblMiles.Text = "Miles driven:";
            // 
            // lblParking
            // 
            this.lblParking.AutoSize = true;
            this.lblParking.Location = new System.Drawing.Point(145, 170);
            this.lblParking.Name = "lblParking";
            this.lblParking.Size = new System.Drawing.Size(69, 13);
            this.lblParking.TabIndex = 4;
            this.lblParking.Text = "Parking fees:";
            // 
            // lblTaxi
            // 
            this.lblTaxi.AutoSize = true;
            this.lblTaxi.Location = new System.Drawing.Point(143, 199);
            this.lblTaxi.Name = "lblTaxi";
            this.lblTaxi.Size = new System.Drawing.Size(71, 13);
            this.lblTaxi.TabIndex = 5;
            this.lblTaxi.Text = "Taxi charges:";
            // 
            // lblSeminar
            // 
            this.lblSeminar.AutoSize = true;
            this.lblSeminar.Location = new System.Drawing.Point(21, 225);
            this.lblSeminar.Name = "lblSeminar";
            this.lblSeminar.Size = new System.Drawing.Size(193, 13);
            this.lblSeminar.TabIndex = 6;
            this.lblSeminar.Text = "Conference or seminar registration fees:";
            // 
            // lblLodging
            // 
            this.lblLodging.AutoSize = true;
            this.lblLodging.Location = new System.Drawing.Point(125, 256);
            this.lblLodging.Name = "lblLodging";
            this.lblLodging.Size = new System.Drawing.Size(89, 13);
            this.lblLodging.TabIndex = 7;
            this.lblLodging.Text = "Lodging charges:";
            // 
            // txtDayTrip
            // 
            this.txtDayTrip.Location = new System.Drawing.Point(220, 47);
            this.txtDayTrip.Name = "txtDayTrip";
            this.txtDayTrip.Size = new System.Drawing.Size(116, 20);
            this.txtDayTrip.TabIndex = 8;
            // 
            // txtAirfareAmount
            // 
            this.txtAirfareAmount.Location = new System.Drawing.Point(220, 80);
            this.txtAirfareAmount.Name = "txtAirfareAmount";
            this.txtAirfareAmount.Size = new System.Drawing.Size(116, 20);
            this.txtAirfareAmount.TabIndex = 9;
            // 
            // txtCarRentalFees
            // 
            this.txtCarRentalFees.Location = new System.Drawing.Point(220, 110);
            this.txtCarRentalFees.Name = "txtCarRentalFees";
            this.txtCarRentalFees.Size = new System.Drawing.Size(116, 20);
            this.txtCarRentalFees.TabIndex = 10;
            // 
            // txtMiles
            // 
            this.txtMiles.Location = new System.Drawing.Point(220, 140);
            this.txtMiles.Name = "txtMiles";
            this.txtMiles.Size = new System.Drawing.Size(116, 20);
            this.txtMiles.TabIndex = 11;
            // 
            // txtParking
            // 
            this.txtParking.Location = new System.Drawing.Point(220, 170);
            this.txtParking.Name = "txtParking";
            this.txtParking.Size = new System.Drawing.Size(116, 20);
            this.txtParking.TabIndex = 12;
            // 
            // txtTaxiCharge
            // 
            this.txtTaxiCharge.Location = new System.Drawing.Point(220, 199);
            this.txtTaxiCharge.Name = "txtTaxiCharge";
            this.txtTaxiCharge.Size = new System.Drawing.Size(116, 20);
            this.txtTaxiCharge.TabIndex = 13;
            // 
            // txtConferenceFees
            // 
            this.txtConferenceFees.Location = new System.Drawing.Point(220, 225);
            this.txtConferenceFees.Name = "txtConferenceFees";
            this.txtConferenceFees.Size = new System.Drawing.Size(116, 20);
            this.txtConferenceFees.TabIndex = 14;
            // 
            // txtLodgingFees
            // 
            this.txtLodgingFees.Location = new System.Drawing.Point(220, 253);
            this.txtLodgingFees.Name = "txtLodgingFees";
            this.txtLodgingFees.Size = new System.Drawing.Size(116, 20);
            this.txtLodgingFees.TabIndex = 15;
            // 
            // lblExpense
            // 
            this.lblExpense.AutoSize = true;
            this.lblExpense.Location = new System.Drawing.Point(38, 301);
            this.lblExpense.Name = "lblExpense";
            this.lblExpense.Size = new System.Drawing.Size(231, 13);
            this.lblExpense.TabIndex = 16;
            this.lblExpense.Text = "Total expenses incurred by the businessperson:";
            // 
            // lblAllowedExpense
            // 
            this.lblAllowedExpense.AutoSize = true;
            this.lblAllowedExpense.Location = new System.Drawing.Point(72, 328);
            this.lblAllowedExpense.Name = "lblAllowedExpense";
            this.lblAllowedExpense.Size = new System.Drawing.Size(197, 13);
            this.lblAllowedExpense.TabIndex = 17;
            this.lblAllowedExpense.Text = "The total allowable expenses for the trip:";
            // 
            // label11
            // 
            this.label11.AutoSize = true;
            this.label11.Location = new System.Drawing.Point(12, 356);
            this.label11.Name = "label11";
            this.label11.Size = new System.Drawing.Size(257, 13);
            this.label11.TabIndex = 18;
            this.label11.Text = "The excess that must be paid by the businessperson:";
            // 
            // label12
            // 
            this.label12.AutoSize = true;
            this.label12.Location = new System.Drawing.Point(62, 383);
            this.label12.Name = "label12";
            this.label12.Size = new System.Drawing.Size(207, 13);
            this.label12.TabIndex = 19;
            this.label12.Text = "The amount saved by the businessperson:";
            // 
            // txtTotalExpenses
            // 
            this.txtTotalExpenses.Location = new System.Drawing.Point(275, 298);
            this.txtTotalExpenses.Name = "txtTotalExpenses";
            this.txtTotalExpenses.ReadOnly = true;
            this.txtTotalExpenses.Size = new System.Drawing.Size(111, 20);
            this.txtTotalExpenses.TabIndex = 20;
            // 
            // txtAllowedExpenses
            // 
            this.txtAllowedExpenses.Location = new System.Drawing.Point(275, 328);
            this.txtAllowedExpenses.Name = "txtAllowedExpenses";
            this.txtAllowedExpenses.ReadOnly = true;
            this.txtAllowedExpenses.Size = new System.Drawing.Size(111, 20);
            this.txtAllowedExpenses.TabIndex = 21;
            // 
            // txtExcessAmount
            // 
            this.txtExcessAmount.Location = new System.Drawing.Point(275, 356);
            this.txtExcessAmount.Name = "txtExcessAmount";
            this.txtExcessAmount.ReadOnly = true;
            this.txtExcessAmount.Size = new System.Drawing.Size(111, 20);
            this.txtExcessAmount.TabIndex = 22;
            // 
            // txtSavedAmount
            // 
            this.txtSavedAmount.Location = new System.Drawing.Point(275, 383);
            this.txtSavedAmount.Name = "txtSavedAmount";
            this.txtSavedAmount.ReadOnly = true;
            this.txtSavedAmount.Size = new System.Drawing.Size(111, 20);
            this.txtSavedAmount.TabIndex = 23;
            // 
            // btnCalculate
            // 
            this.btnCalculate.Location = new System.Drawing.Point(85, 440);
            this.btnCalculate.Name = "btnCalculate";
            this.btnCalculate.Size = new System.Drawing.Size(129, 33);
            this.btnCalculate.TabIndex = 24;
            this.btnCalculate.Text = "Calculate";
            this.btnCalculate.UseVisualStyleBackColor = true;
            this.btnCalculate.Click += new System.EventHandler(this.btnCalculate_Click);
            // 
            // btnReset
            // 
            this.btnReset.Location = new System.Drawing.Point(257, 440);
            this.btnReset.Name = "btnReset";
            this.btnReset.Size = new System.Drawing.Size(129, 33);
            this.btnReset.TabIndex = 25;
            this.btnReset.Text = "Reset";
            this.btnReset.UseVisualStyleBackColor = true;
            this.btnReset.Click += new System.EventHandler(this.btnReset_Click);
            // 
            // btnExit
            // 
            this.btnExit.Location = new System.Drawing.Point(421, 440);
            this.btnExit.Name = "btnExit";
            this.btnExit.Size = new System.Drawing.Size(129, 33);
            this.btnExit.TabIndex = 26;
            this.btnExit.Text = "Exit";
            this.btnExit.UseVisualStyleBackColor = true;
            this.btnExit.Click += new System.EventHandler(this.btnExit_Click);
            // 
            // ExpenseForm
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(800, 507);
            this.Controls.Add(this.btnExit);
            this.Controls.Add(this.btnReset);
            this.Controls.Add(this.btnCalculate);
            this.Controls.Add(this.txtSavedAmount);
            this.Controls.Add(this.txtExcessAmount);
            this.Controls.Add(this.txtAllowedExpenses);
            this.Controls.Add(this.txtTotalExpenses);
            this.Controls.Add(this.label12);
            this.Controls.Add(this.label11);
            this.Controls.Add(this.lblAllowedExpense);
            this.Controls.Add(this.lblExpense);
            this.Controls.Add(this.txtLodgingFees);
            this.Controls.Add(this.txtConferenceFees);
            this.Controls.Add(this.txtTaxiCharge);
            this.Controls.Add(this.txtParking);
            this.Controls.Add(this.txtMiles);
            this.Controls.Add(this.txtCarRentalFees);
            this.Controls.Add(this.txtAirfareAmount);
            this.Controls.Add(this.txtDayTrip);
            this.Controls.Add(this.lblLodging);
            this.Controls.Add(this.lblSeminar);
            this.Controls.Add(this.lblTaxi);
            this.Controls.Add(this.lblParking);
            this.Controls.Add(this.lblMiles);
            this.Controls.Add(this.lblCar);
            this.Controls.Add(this.lblAirfare);
            this.Controls.Add(this.lblDays);
            this.Name = "ExpenseForm";
            this.Text = "Travel Expense Calculator";
            this.ResumeLayout(false);
            this.PerformLayout();

        }

        #endregion

        private System.Windows.Forms.Label lblDays;
        private System.Windows.Forms.Label lblAirfare;
        private System.Windows.Forms.Label lblCar;
        private System.Windows.Forms.Label lblMiles;
        private System.Windows.Forms.Label lblParking;
        private System.Windows.Forms.Label lblTaxi;
        private System.Windows.Forms.Label lblSeminar;
        private System.Windows.Forms.Label lblLodging;
        private System.Windows.Forms.TextBox txtDayTrip;
        private System.Windows.Forms.TextBox txtAirfareAmount;
        private System.Windows.Forms.TextBox txtCarRentalFees;
        private System.Windows.Forms.TextBox txtMiles;
        private System.Windows.Forms.TextBox txtParking;
        private System.Windows.Forms.TextBox txtTaxiCharge;
        private System.Windows.Forms.TextBox txtConferenceFees;
        private System.Windows.Forms.TextBox txtLodgingFees;
        private System.Windows.Forms.Label lblExpense;
        private System.Windows.Forms.Label lblAllowedExpense;
        private System.Windows.Forms.Label label11;
        private System.Windows.Forms.Label label12;
        private System.Windows.Forms.TextBox txtTotalExpenses;
        private System.Windows.Forms.TextBox txtAllowedExpenses;
        private System.Windows.Forms.TextBox txtExcessAmount;
        private System.Windows.Forms.TextBox txtSavedAmount;
        private System.Windows.Forms.Button btnCalculate;
        private System.Windows.Forms.Button btnReset;
        private System.Windows.Forms.Button btnExit;
    }
}

output: