GetOracleLob(String) Method
Gets the value of the specified column as a
OracleLob object.
'Declaration
Public Overloads Function GetOracleLob( _
ByVal As String _
) As OracleLob
Parameters
- name
Return Value
The value of the specified column as a
OracleLob object.
This example shows how to download a LOB field from a table using
GetOracleLob method.
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
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