private void AddButton_Click(object sender, EventArgs e)
{
if (ItemNameTextBox.Text != string.Empty && AmountInStkTextBox.Text != string.Empty && SupplierNameTextBox.Text != string.Empty && DateTextBox.Text != string.Empty)
{
DBC.getConnection();
using (SQLiteConnection con = new SQLiteConnection(DBC.connectionString))
{
con.Open(); // open database
// select supplierID using inputted supplier name
SQLiteCommand cmdSup = new SQLiteCommand(string.Format(@"SELECT SupplierID FROM Supplier WHERE Name='{0}'", SupplierNameTextBox.Text), con);
SQLiteDataReader reader = cmdSup.ExecuteReader();
if (reader.HasRows)
{
reader.Read();
int sID = reader.GetInt32(0); // store PK value
reader.Close(); // close data reader
// insert data into Stock table
SQLiteCommand cmd = new SQLiteCommand(@"INSERT INTO Stock(ItemName, AmountInStock, DataLastUpdated, SupplierID) VALUES (@Name, @AIS, @DLU, @S)", con);
cmd.Parameters.AddWithValue("@Name", ItemNameTextBox.Text);
cmd.Parameters.AddWithValue("@AIS", AmountInStkTextBox.Text);
cmd.Parameters.AddWithValue("@DLU", DateTextBox.Text);
cmd.Parameters.AddWithValue("@S", sID);
cmd.ExecuteNonQuery();
MessageBox.Show("Data has been added"); // exception handling
}
else // if supplier name inputted is not in Supplier table then shows following message and sends user to add upplier info
{
MessageBox.Show("Supplier doesn't exist. Please input the supplier details before adding stock data.");
Suppliers sup = new Suppliers();
this.Close(); // close form
sup.Show(); // show supplier form
}
con.Close(); // close database
}
}
else
{
foreach (Control c in this.Controls)
{
if (c is TextBox)
{
TextBox textBox = c as TextBox;
if (textBox.Text == string.Empty)
{
if (textBox == ItemNameTextBox)
{
MessageBox.Show("Enter Item Name");
}
else if (textBox == AmountInStkTextBox)
{
MessageBox.Show("Enter the Amount in Stock");
}
else if (textBox == SupplierNameTextBox)
{
MessageBox.Show("Enter the name of the Supplier");
}
else if (textBox == DateTextBox)
{
MessageBox.Show("Enter the date");
}
}
}
}
}
}
private void SupplierButton_Click(object sender, EventArgs e)
{
Suppliers S = new Suppliers();
S.Show();
}