OracleLob.CopyTo Method (OracleLob)

 

Copies from this OracleLob to a destination OracleLob.

Namespace:   System.Data.OracleClient
Assembly:  System.Data.OracleClient (in System.Data.OracleClient.dll)

member CopyTo : 
        destination:OracleLob -> int64

Parameters

destination
Type: System.Data.OracleClient.OracleLob

The destination OracleLob.

Return Value

Type: System.Int64

The number of bytes copied. This excludes any padded bytes.

Exception Condition
ArgumentNullException

The OracleLob specified in the destination parameter is null.

InvalidOperationException

The operation is not within a transaction, the OracleLob object is null, or the connection is closed.

OracleException

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 the LOB and the 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.

System_CAPS_noteNote

In this release, a write operation to a read-only LOB might succeed, but not update the LOB on the server. In this case, however, the local copy of the LOB will be 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.

.NET Framework
Available since 1.1
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