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OracleBFile.Seek Method

Note: This namespace, class, or member is supported only in version 1.1 of the .NET Framework.

Sets the position on the current OracleBFile stream.

[Visual Basic]
Overrides Public Function Seek( _
   ByVal offset As Long, _
   ByVal origin As SeekOrigin _
) As Long
[C#]
public override long Seek(
 long offset,
 SeekOrigin origin
);
[C++]
public: __int64 Seek(
 __int64 offset,
 SeekOrigin origin
);
[JScript]
public override function Seek(
   offset : long,
 origin : SeekOrigin
) : long;

Parameters

offset
A byte offset relative to origin. If offset is negative, the new position will precede the position specified by origin by the number of bytes specified by offset. If offset is zero, the new position will be the position specified by origin. If offset is positive, the new position will follow the position specified by origin by the number of bytes specified by offset.
origin
A value of type System.IO.SeekOrigin indicating the reference point used to obtain the new position.

Return Value

The new position within the current stream.

Exceptions

Exception Type Condition
ArgumentOutOfRangeException Attempted to set a position with a negative value or greater than the length of the stream.
ObjectDisposedException Methods were called after the stream was closed or disposed.

Remarks

If offset is negative, the new position is required to precede the position specified by origin by the number of bytes specified by offset. If offset is zero (0), the new position is required to be the position specified by origin. If offset is positive, the new position is required to follow the position specified by origin by the number of bytes specified by offset.

Seeking to any location beyond the length of the stream is not supported.

Any attempt to access a closed OracleBFile using the Read or Seek methods reopens an OracleBFile stream automatically.

The following C# example assumes this schema in an Oracle table:

(col1 number, col2 BFILE)

The example demonstrates using the Read and Seek methods to access an OracleBFile object.

byte[] buffer = new byte[100];
OracleDataReader myReader = myCommand.ExecuteReader();
using (myReader) {
    if (myReader.Read()) {
            OracleBFile myBFile = myReader.GetOracleBFile(1);
        using (myBFile) {
            myBFile.Seek(0, SeekOrigin.Begin);
            myBFile.Read(buffer, 0, 100);
        }
    }
}

Requirements

Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

.NET Framework Security: 

See Also

OracleBFile Class | OracleBFile Members | System.Data.OracleClient Namespace

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