private void ClearButton_Click(object sender, EventArgs e)
{
// code which clears the selected value and changes visisbility of form.
QuantityValuesTextBox.Focus();
QuantityValuesTextBox.SelectAll();
ButtonPanelOne.Visible = true;
CancelButton.Visible = true;
DataGridViewPanel.Visible = false;
DataGridCart.ClearSelection();
DataGridCart.Rows.Clear();
TotalCostValueTextBox.Text = "0";
FinalValue = 0;
QuantityValuesTextBox.Clear();
ExitButton.Focus();
BeerNamesListBox.SelectedItems.Clear();
BeerSubTypeListBox.SelectedItems.Clear();
PriceForBeerListBox.SelectedItems.Clear();
DataGridCart.Visible = false;
TotalCostValueTextBox.Visible = false;
TotalcostLabel.Visible = false;
DataGridCart.ClearSelection();
DataGridCart.Rows.Clear();
}
// Confirm button which send transaction details to text file.
private void button2_Click(object sender, EventArgs e)
{
ClearButton.Visible = true;
CancelButton.Visible = false;
// Code to shift the focus to ClearButton.
ClearButton.Focus();
// Code to create string builder and formatted into Text File.
StringBuilder sb = new StringBuilder();
//Local variable declaration section.
int DataGridCartLength = DataGridCart.RowCount;
for (int i = 0; i < DataGridCartLength; i++)
{
// code to format the string and appended from datagrid view.
sb.AppendLine(DataGridCart[0, i].Value?.ToString() + " 0f " + DataGridCart[2, i].Value?.ToString() + " " + DataGridCart[1, i].Value?.ToString() + " " + DataGridCart[3, i].Value?.ToString());
}
//decision construct to write the transaction text file.
if (MessageBox.Show(string.Format(sb.ToString() + "Total Transaction Cost is" + CURRENCY + FinalValue.ToString()), "Confirmation Message", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
{
//code which instanciates streamwriter class.
StreamWriter OutputFile;
//code to append the string to file.
OutputFile = File.AppendText("TransactionsFile.txt");
OutputFile.Close();
// Local Variable declaration restriceted to this decision construct.
string Temp;
int RandomNumber = 0;
int BeerConfirmIndex = BeerNamesListBox.SelectedIndex;
int BeerSizeConfirmed = BeerSubTypeListBox.SelectedIndex;
//Code which copy the contents of original array to destination array.
Array.Copy(TempStockArray, StockArray, TempStockArray.Length);
//StockArray[BeerConfirmIndex, BeerSizeConfirmed] = TempStockArray[BeerConfirmIndex, BeerSizeConfirmed];
// calling random number generation method.
RandomNumberGenerator(ref RandomNumber);
StreamReader InputFile;
InputFile = File.OpenText("TransactionsFile.txt");
while (!InputFile.EndOfStream)
{
Temp = InputFile.ReadLine();
// To check and generate unique random number.
if (Temp == RandomNumber.ToString())
{
RandomNumberGenerator(ref RandomNumber);
}
}
InputFile.Close();
//Code which appends transaction details from gridview to text file.
StreamWriter FileOpen;
FileOpen = File.AppendText("TransactionsFile.txt");
FileOpen.WriteLine(RandomNumber);
FileOpen.WriteLine(GetDateTime.ToShortDateString());
for (int i = 0; i < DataGridCart.Rows.Count; i++)
{
for (int j = 0; j < 4; j++)
{
FileOpen.WriteLine(DataGridCart[j, i].Value?.ToString());
}
}
FileOpen.WriteLine("123");
FileOpen.Close();
}
// Decision construct if selected cart items will not be purchased.
else
{
// code to clear the gridview cells.
DataGridCart.ClearSelection();
DataGridCart.Rows.Clear();
TotalCostValueTextBox.Clear();
QuantityValuesTextBox.Clear();
ClearButton.Focus();
}
}