p; Console.WriteLine(); Console.WriteLine("Categories After Insert"); Console.WriteLine("------------------------------");
scd.ReadData();
// use ExecuteNonQuery method for Update scd.UpdateData();
Console.WriteLine(); Console.WriteLine("Categories After Update"); Console.WriteLine("------------------------------");
scd.ReadData();
// use ExecuteNonQuery method for Delete scd.DeleteData();
Console.WriteLine(); Console.WriteLine("Categories After Delete"); Console.WriteLine("------------------------------");
scd.ReadData();
// use ExecuteScalar method int numberOfRecords = scd.GetNumberOfRecords();
Console.WriteLine(); Console.WriteLine("Number of Records: {0}", numberOfRecords); }
///<summary> /// use ExecuteReader method ///</summary> publicvoid ReadData() { SqlDataReader rdr = null; try { // Open the connection conn.Open(); // 1. Instantiate a new command with a query and connection SqlCommand cmd = new SqlCommand("select CategoryName from Categories", conn); // 2. Call Execute reader to get query results rdr = cmd.ExecuteReader();
// print the CategoryName of each record while (rdr.Read()) { Console.WriteLine(rdr[0]); } } finally { // close the reader if (rdr != null) { rdr.Close(); } // Close the connection if (conn != null) { conn.Close(); } } }
///<summary> /// use ExecuteNonQuery method for Insert ///</summary> publicvoid InsertData() { try { // Open the connection conn.Open(); &nb
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