Parameters
- i
- The zero-based column ordinal.
Return Value
The value of the specified column as a OracleLob object.
Refer to "Working with BLOB and CLOB Data" article for detailed information.
public void DownloadLob(OracleConnection myConnection) { OracleCommand myCommand = new OracleCommand("SELECT * FROM Test.Pictures", myConnection); myConnection.Open(); OracleDataReader myReader = myCommand.ExecuteReader(System.Data.CommandBehavior.Default); try { while (myReader.Read()) { OracleLob myLob = myReader.GetOracleLob(myReader.GetOrdinal("Picture")); if(!myLob.IsNull) { string FN = myReader.GetString(myReader.GetOrdinal("PicName")); FileStream fs = new FileStream("D:\\Tmp\\"+FN+".bmp", FileMode.Create); BinaryWriter w = new BinaryWriter(fs); w.Write(myLob.Value); w.Close(); fs.Close(); Console.WriteLine(FN+" downloaded."); } } } finally { myReader.Close(); myConnection.Close(); } }
Public Sub DownloadLob(ByVal myConnection As OracleConnection) Dim myCommand As New OracleCommand("SELECT * FROM Test.Pictures", myConnection) myConnection.Open() Dim myReader As OracleDataReader = myCommand.ExecuteReader(System.Data.CommandBehavior.Default) Try While myReader.Read() Dim myLob As OracleLob = myReader.GetOracleLob(myReader.GetOrdinal("Picture")) If Not myLob.IsNull Then Dim FN As String = myReader.GetString(myReader.GetOrdinal("PicName")) Dim fs As FileStream = New FileStream("D:\Tmp\" + FN + ".bmp", FileMode.Create) Dim w As BinaryWriter = New BinaryWriter(fs) w.Write(myLob.Value) w.Close() fs.Close() Console.WriteLine(String.Concat(FN, " downloaded.")) End If End While Finally myReader.Close() myConnection.Close() End Try End Sub