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Devart.Data.DB2 Namespace / DB2DataReader Class / Read Method
Example

In This Topic
    Read Method (DB2DataReader)
    In This Topic
    Advances the DB2DataReader to the next record.
    Syntax
    'Declaration
     
    Public Overrides Function Read() As Boolean
    public override bool Read()

    Return Value

    true if there are more rows; otherwise, false.
    Remarks
    The default position of the DB2DataReader is prior to the first record. Therefore, you must call Read to begin accessing any data.

    While the DB2DataReader is in use, the associated DB2Connection is busy serving it until you call Close.

    Example
    The following example creates a DB2Connection, a DB2Command, and a DB2DataReader. The example reads through the data, writing it out to the console. Finally, the example closes the DB2DataReader, then the DB2Connection.
    public void ReadMyData(string myConnString)
    {
      string mySelectQuery = "SELECT DeptNo, DName FROM Dept";
      DB2Connection db2Connection = new DB2Connection(myConnString);
      DB2Command db2Command = new DB2Command(mySelectQuery,db2Connection);
      db2Connection.Open();
      DB2DataReader db2Reader;
      db2Reader = db2Command.ExecuteReader();
      // Always call Read before accessing data.
      while (db2Reader.Read()) {
        Console.WriteLine(db2Reader.GetInt32(0) + ", " + db2Reader.GetString(1));
      }
      // always call Close when done reading.
      db2Reader.Close();
      // Close the connection when done with it.
      db2Connection.Close();
    }
    Public Sub ReadMyData(myConnString As String)
      Dim mySelectQuery As String = "SELECT DeptNo, DName FROM Dept"
      Dim db2Connection As New DB2Connection(myConnString)
      Dim db2Command As New DB2Command(mySelectQuery, db2Connection)
      db2Connection.Open()
      Dim db2Reader As DB2DataReader
      db2Reader = db2Command.ExecuteReader()
      ' Always call Read before accessing data.
      While db2Reader.Read()
        Console.WriteLine(db2Reader.GetInt32(0).ToString() + ", " _
          + db2Reader.GetString(1))
      End While
      ' always call Close when done reading.
      db2Reader.Close()
      ' Close the connection when done with it.
      db2Connection.Close()
    End Sub
    Requirements

    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

    See Also