Question

DinnerFun dinnerFun = new DinnerFun { PeepQty = (int)nudPeepQty.Value };

I am creating a new object of the DinnerFun class and trying to assign the value from the numeric up down object from the form to the int variable PeepQty.

When I go into debug mode, I can see that sure enough nudPeepQty has a numeric value, but it is never assigned to PeepQty, and my ending calculation always ends as 0.

As the problem might be something related to something I’ve done outside this line of code, I will add the rest of my project below:

DinnerParty.cs

    using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace MonuEventPlanning
{
    class DinnerFun
    {
        const int FoodCost = 25;
        public int PeepQty;
        decimal CostOfBeverage;
        decimal CostOfDecorations;
        decimal TotalCost; 

        public void CalcDrinks(bool HealthOption)
        {
            if (HealthOption)
            {
                CostOfBeverage = 5M;
            }
            else
            {
                CostOfBeverage = 20M;
            }
        }

        public void CalcDecorations(bool FancyOption)
        {
            if (FancyOption)
            {
                CostOfDecorations = (PeepQty * 15M) + 50M; 
            }
            else
            {
                CostOfDecorations = (PeepQty * 7.5M) + 30M; 
            }
        }

        public decimal CalcTotalCost(bool HealthyOption)
        {
            if (HealthyOption)
            {
                TotalCost = (CostOfDecorations + CostOfBeverage) * .95M;
                return TotalCost; 
            }
            else
            {
                TotalCost = (CostOfBeverage + CostOfDecorations) + (PeepQty*25M);
                return TotalCost; 
            }
        }
    }
}

————Form1.cs ————-

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

namespace MonuEventPlanning
{
    public partial class Form1 : Form
    {

        public Form1()
        {
            InitializeComponent();
        }

        private void btnCalc_Click(object sender, EventArgs e)
        {
            DinnerFun dinnerFun = new DinnerFun { PeepQty = (int)nudPeepQty.Value };
            dinnerFun.CalcDrinks(cbxHealthy.Checked);
            dinnerFun.CalcDrinks(cbxFancy.Checked);
            DisplayCost(); 
        }

        public void DisplayCost()
        {
            DinnerFun dinnerFun = new DinnerFun(); 
            tbxDisplayCost.Text = dinnerFun.CalcTotalCost(cbxHealthy.Checked).ToString("c"); 
        }
    }
}

Answer 1

The issue is that you are creating another DinnerFun that is not the same as the first one. Naturally the DinnerFun object in DisplayCost will have zero for the property value. Perhaps you meant this…

    private void btnCalc_Click(object sender, EventArgs e)
    {
        DinnerFun dinnerFun = new DinnerFun { PeepQty = (int)nudPeepQty.Value };
        dinnerFun.CalcDrinks(cbxHealthy.Checked);
        dinnerFun.CalcDrinks(cbxFancy.Checked);
        DisplayCost(dinnerFun); 
    }

    public void DisplayCost(DinnerFun dinnerFun)
    {
        tbxDisplayCost.Text = dinnerFun.CalcTotalCost(cbxHealthy.Checked).ToString("c"); 
    }