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Erase Method
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OracleLob::Erase Method

Erases all data from this OracleLob.

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

public:
long long Erase()

Return Value

Type: System::Int64
The number of bytes erased.

ExceptionCondition
InvalidOperationException

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

ObjectDisposedException

The object was closed or disposed.

OracleException

An Oracle error has occurred.

Erase does not truncate data. The LOB length remains the same for a BLOB data type, and the erased data is replaced by 0x00. CLOB and NCLOB data types are replaced by spaces.

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.

NoteNote

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.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1
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