OracleLob.CopyTo Method (Int64, OracleLob, Int64, Int64)
Assembly: System.Data.OracleClient (in system.data.oracleclient.dll)
'Declaration Public Function CopyTo ( _ sourceOffset As Long, _ destination As OracleLob, _ destinationOffset As Long, _ amount As Long _ ) As Long 'Usage Dim instance As OracleLob Dim sourceOffset As Long Dim destination As OracleLob Dim destinationOffset As Long Dim amount As Long Dim returnValue As Long returnValue = instance.CopyTo(sourceOffset, destination, destinationOffset, amount)
public long CopyTo ( long sourceOffset, OracleLob destination, long destinationOffset, long amount )
public function CopyTo ( sourceOffset : long, destination : OracleLob, destinationOffset : long, amount : long ) : long
The offset from which to copy. For CLOB and NCLOB data types, this must be an even number.
The destination OracleLobSystem.Data.OracleClient.
The destination offset to which to copy. For CLOB and NCLOB data types, this must be an even number.
The quantity of data, in bytes, to copy. For CLOB and NCLOB data types, this must be an even number.
Return ValueThe number of bytes copied. This excludes any padded bytes.
The OracleLob specified in the destination parameter is full.
A value specified in the amount, sourceOffset, or destinationOffset parameter is less than zero or greater than 4 gigabytes.
A value specified in the amount, sourceOffset, or destinationOffset parameter for a CLOB or NCLOB data type is not even.
The operation is not within a transaction, the OracleLob object is null, or the connection is closed.
An Oracle error has occurred.
The underlying data types must always be the same. For example, if you are copying from an NClob, the destination OracleLob must also be an NClob.
If the destination offset is beyond the end of destination LOB, the LOB to which the data is being copied is extended. The space between the end of LOB and destination offset beyond the end is padded with zeros for BLOB data types and spaces for CLOB and NCLOB data types.
To write to the LOB, you must have retrieved the LOB using the FOR UPDATE clause in the SQL SELECT statement, and you must have a local transaction started.
In this release, a write operation to a read-only LOB might succeed, but does not update the LOB on the server. In this case, however, the local copy of the LOB is updated. Therefore, later read operations on the OracleLob object might return the results of the write operation.
The CopyTo method does not clear the contents of the destination OracleLob before performing the copy operation.
Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter EditionThe Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.