Reads a forward-only stream of rows from MySQL.
The following example creates a
MySqlConnection, a
MySqlCommand, and a
MySqlDataReader. The example reads through the data, writing it out to the console. Finally, the example closes the
MySqlDataReader, then the
MySqlConnection.
public void ReadMyData(string myConnString) {
MySqlConnection myConnection = new MySqlConnection(myConnString);
MySqlCommand myCommand = (MySqlCommand)myConnection.CreateCommand();
myCommand.CommandText = "SELECT DeptNo, DName, Loc FROM Test.Dept";
myConnection.Open();
MySqlDataReader myReader = myCommand.ExecuteReader();
try {
// Always call Read before accessing data.
while (myReader.Read()) {
Console.WriteLine(myReader.GetInt32(0).ToString() + " " +
myReader.GetString(1) + " " + myReader.GetString(2));
}
}
finally {
// always call Close when done reading.
myReader.Close();
// Close the connection when done with it.
myConnection.Close();
}
}
Public Sub ReadMyData(ByVal myConnString As String)
Dim myConnection As New MySqlConnection(myConnString)
Dim myCommand As MySqlCommand = myConnection.CreateCommand()
myCommand.CommandText = "SELECT DeptNo, DName, Loc FROM Test.Dept"
myConnection.Open()
Dim myReader As MySqlDataReader = myCommand.ExecuteReader()
Try
' Always call Read before accessing data.
While myReader.Read()
Console.WriteLine(String.Concat(myReader.GetInt32(0).ToString(), " ", _
myReader.GetString(1), " ", myReader.GetString(2)))
End While
Finally
' always call Close when done reading.
myReader.Close()
' Close the connection when done with it.
myConnection.Close()
End Try
End Sub
Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2