private void exchangeButton_Click(object sender, EventArgs e)
{
NbpTableRate fromRateTmp = (NbpTableRate)this.fromCurrentylComboBox.SelectedItem;
this.fromCurrentylComboBox.SelectedItem = this.toCurrentlyComboBox.SelectedItem;
this.toCurrentlyComboBox.SelectedItem = fromRateTmp;
}
public static double calculate(double amount, NbpTableRate fromCurrency, NbpTableRate toCurrency, bool round = true)
{
double convertedValue;
if (fromCurrency.Code.Equals("PLN"))
{
convertedValue = Calculator.calculatePlnToOther(amount, fromCurrency, toCurrency);
}
else if (toCurrency.Code.Equals("PLN"))
{
convertedValue = Calculator.calculateOtherToPln(amount, fromCurrency, toCurrency);
}
else
{
convertedValue = Calculator.calculateOtherToPln(amount, fromCurrency, toCurrency);
convertedValue = Calculator.calculatePlnToOther(convertedValue, fromCurrency, toCurrency);
}
if (!round)
{
return(convertedValue);
}
else
{
return(Math.Floor(convertedValue * 100) / 100);
}
}
public void addPlnToRates()
{
NbpTableRate pln = new NbpTableRate();
pln.Code = "PLN";
pln.Currency = "Polish zloty";
pln.Mid = 1;
this.nbpRates.Add(pln);
}
private NbpTableRate findCurrency(string code)
{
NbpTableRate foundRate = null;
foreach (NbpTableRate rate in nbpRates)
{
if (rate.Code.Equals(code))
{
foundRate = rate;
}
}
return(foundRate);
}
private void convertButton_Click(object sender, EventArgs e)
{
double amount;
if (double.TryParse(inputValueTextBox.Text, out amount))
{
NbpTableRate fromCurrency = this.findCurrency(((NbpTableRate)this.fromCurrentylComboBox.SelectedItem).Code);
NbpTableRate toCurrency = this.findCurrency(((NbpTableRate)this.toCurrentlyComboBox.SelectedItem).Code);
double convertedAmount = Calculator.calculate(amount, fromCurrency, toCurrency);
convertedValueLabel.Text = String.Format("{0:0.00}", convertedAmount);
}
else
{
MessageBox.Show("You input bad value", "Error input value");
}
}
public static double calculateOtherToPln(double amount, NbpTableRate fromCurrency, NbpTableRate toCurrency)
{
return(amount * fromCurrency.Mid);
}
public static double calculatePlnToOther(double amount, NbpTableRate fromCurrency, NbpTableRate toCurrency)
{
return(amount / toCurrency.Mid);
}