public Main()
{
InitializeComponent();
ManagerLib.DataBaseHelper db = new ManagerLib.DataBaseHelper();
db.OpenConnection();
dgvContact.DataSource = db.ShowDataInGridView("SELECT * FROM Contact");
}
private void btAdd_Click(object sender, EventArgs e)
{
ManagerLib.DataBaseHelper db = new ManagerLib.DataBaseHelper();
db.OpenConnection();
//Nice awful query - score for SQL injections : 90/100
string query = "INSERT INTO Contact VALUES ('" + tbName.Text + "', '" + tbIP.Text + "', '" + tbHostName.Text + "')";
db.ExecuteQueries(query);
db.CloseConnection();
}