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| author | | 1970-01-01 00:00:00 +0000 |
|---|---|---|
| committer | | 2025-01-08 04:44:47 +0000 |
| commit | 1f317d3eb564e463a78cd0e47f4bcf95838c60ec (patch) | |
| tree | 2c36aebaaf84c22cc3ddaa81809f01f95e326e08 /future_value2/FutureValue/frmFutureValue.cs | |
| parent | invoice total 2 (diff) | |
| download | cs-1f317d3eb564e463a78cd0e47f4bcf95838c60ec.tar cs-1f317d3eb564e463a78cd0e47f4bcf95838c60ec.tar.gz cs-1f317d3eb564e463a78cd0e47f4bcf95838c60ec.tar.bz2 cs-1f317d3eb564e463a78cd0e47f4bcf95838c60ec.tar.xz cs-1f317d3eb564e463a78cd0e47f4bcf95838c60ec.zip | |
future value 2
Diffstat (limited to 'future_value2/FutureValue/frmFutureValue.cs')
| -rw-r--r-- | future_value2/FutureValue/frmFutureValue.cs | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/future_value2/FutureValue/frmFutureValue.cs b/future_value2/FutureValue/frmFutureValue.cs new file mode 100644 index 0000000..f301573 --- /dev/null +++ b/future_value2/FutureValue/frmFutureValue.cs @@ -0,0 +1,128 @@ +using System; +using System.Collections.Generic; +using System.ComponentModel; +using System.Data; +using System.Drawing; +using System.Linq; +using System.Text; +using System.Threading.Tasks; +using System.Windows.Forms; + +namespace FutureValue +{ + public partial class frmFutureValue : Form + { + public frmFutureValue() + { + InitializeComponent(); + } + + private bool IsDecimal(string txt, string name) + { + if (Decimal.TryParse(txt, out _)) + return true; + MessageBox.Show(name + " must be a decimal"); + return false; + } + + private bool IsInt32(string txt, string name) + { + if (Int32.TryParse(txt, out _)) + return true; + MessageBox.Show(name + " must be an integer"); + return false; + } + + private bool IsWithinRange(string txt, string name, decimal min, decimal max) + { + if (Decimal.TryParse(txt, out decimal i)) + if (i < min || i > max) { + MessageBox.Show(name + " must be in the range of " + + min + " to " + max + "\n"); + return false; + } + return true; + } + + private bool IsValidData() + { + bool valid = true; + + if(!IsDecimal(txtMonthlyInvestment.Text, + txtMonthlyInvestment.Name)) + valid = false; + if(!IsWithinRange(txtMonthlyInvestment.Text, + txtMonthlyInvestment.Name, 0, 10000)) + valid = false; + + if(!IsDecimal(txtInterestRate.Text, + txtInterestRate.Name)) + valid = false; + if(!IsWithinRange(txtInterestRate.Text, + txtInterestRate.Name, 0, 10000)) + valid = false; + + if(!IsInt32(txtYears.Text, + txtYears.Name)) + valid = false; + if(!IsWithinRange(txtYears.Text, + txtYears.Name, 0, 10000)) + valid = false; + + return valid; + } + + private void btnCalculate_Click(object sender, EventArgs e) + { + try { + if (!IsValidData()) + return; + + decimal monthlyInvestment = Convert.ToDecimal(txtMonthlyInvestment.Text); + decimal yearlyInterestRate = Convert.ToDecimal(txtInterestRate.Text); + int years = Convert.ToInt32(txtYears.Text); + + int months = years * 12; + decimal monthlyInterestRate = yearlyInterestRate / 12 / 100; + + decimal futureValue = this.CalculateFutureValue( + monthlyInvestment, monthlyInterestRate, months); + txtFutureValue.Text = futureValue.ToString("c"); + txtMonthlyInvestment.Focus(); + + /* throw new Exception("There was an unknown error"); */ + } + /* catch (FormatException) { + MessageBox.Show("Invalid format: Try entering " + + "numbers between 1 and 9999", "Entry Error"); + } + catch (OverflowException) { + MessageBox.Show("Overflow Error: Try entering" + + "smaller numbers", "Entry Error"); + } */ + catch (Exception ex){ + MessageBox.Show(ex.Message + "\n" + + ex.GetType().ToString() + "\n" + + ex.StackTrace, "Entry Error"); + } + } + + private decimal CalculateFutureValue(decimal monthlyInvestment, + decimal monthlyInterestRate, int months) + { + decimal futureValue = 0m; + for (int i = 0; i < months; i++) + { + futureValue = (futureValue + monthlyInvestment) + * (1 + monthlyInterestRate); + } + return futureValue; + } + + private void btnExit_Click(object sender, EventArgs e) + { + this.Close(); + } + + } +} |