private void btnRegBook_Click_1(object sender, EventArgs e)
{
Book selbook =
cmbBooks.SelectedItem as Book;
Customer selCust =
cmbCustomers.SelectedItem as Customer;
BookRegistration selReg =
new BookRegistration();
selReg.CustomerID = selCust.CustomerID;
selReg.ISBN = selbook.ISBN;
selReg.RegDate = dtpDate.Value;
BookRegistrationDB.Registration(selReg);
MessageBox.Show("Registration completed!");
}
public static List <BookRegistration> GetRegistration()
{
//Step 1: Get connection to DB
SqlConnection con = GetConnection();
//Step 2: Prepare query
SqlCommand selCmd = new SqlCommand();
selCmd.Connection = con;
selCmd.CommandText = "SELECT CustomerID" +
", ISBN" +
" ,RegDate" +
" FROM Registration";
//Step 3: Open Connection
con.Open();
//Step 4: Execute query
SqlDataReader rdr = selCmd.ExecuteReader();
//Step 5: Do something with result
List <BookRegistration> registrations = new List <BookRegistration>();
while (rdr.Read())
{
BookRegistration temp = new BookRegistration
{
CustomerID = (int)rdr["CustomerID"],
ISBN = (string)rdr["ISBN"],
RegDate = (DateTime)rdr["RegDate"]
};
registrations.Add(temp);
}
//Step 6: Close connection
//con.Close();
con.Dispose(); //will also close connection
return(registrations);
}
public static bool Registration(BookRegistration Reg)
{
SqlConnection con = GetConnection();
SqlCommand insertCmd = new SqlCommand();
insertCmd.Connection = con;
insertCmd.CommandText =
"INSERT INTO Registration(CustomerID, ISBN, RegDate)" +
" VALUES(@CustomerID, @ISBN, @RegDate)";
insertCmd.Parameters.AddWithValue("@CustomerID", Reg.CustomerID);
insertCmd.Parameters.AddWithValue("@ISBN", Reg.ISBN);
insertCmd.Parameters.AddWithValue("@RegDate", Reg.RegDate);
try
{
con.Open();
int rows = insertCmd.ExecuteNonQuery();
if (rows == 1)
{
return(true);
}
else
{
return(false);
}
}
catch (SqlException)
{
//SqlExpection will be thrown if
//DB is not available or DB is too busy
return(false);
}
finally //Finally ALWAYS executes
{
//close connection
con.Dispose();
}
}
