Reads a forward-only stream of rows from Oracle.
The following example creates a
OracleConnection, a
OracleCommand, and a
OracleDataReader. The example reads through the data, writing it out to the console. Finally, the example closes the
OracleDataReader, then the
OracleConnection.
public void ReadMyData(string myConnString) {
OracleConnection myConnection = new OracleConnection(myConnString);
OracleCommand myCommand = (OracleCommand)myConnection.CreateCommand();
myCommand.CommandText = "SELECT DeptNo, DName, Loc FROM Test.Dept";
myConnection.Open();
OracleDataReader 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 OracleConnection(myConnString)
Dim myCommand As OracleCommand = myConnection.CreateCommand()
myCommand.CommandText = "SELECT DeptNo, DName, Loc FROM Test.Dept"
myConnection.Open()
Dim myReader As OracleDataReader = 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