[Overview][Constants][Types][Classes][Procedures and functions][Variables][Index] Reference for unit 'DB' (#fcl)

TDataSet.CreateBlobStream

Create blob stream

Declaration

Source position: db.pas line 1677

public function TDataSet.CreateBlobStream(

  Field: TField;

  Mode: TBlobStreamMode

):TStream; virtual;

Arguments

Field

  

BLOB Field for which data should be fetched/written

Mode

  

Mode: read or write

Function result

Stream with (for) blob data

Description

CreateBlobStream is not intended for use by application programmers. It creates a stream object which can be used to read or write data from a blob field. Instead, application programmers should use the TBlobField.LoadFromStream and TBlobField.SaveToStream methods when reading and writing data from/to BLOB fields. Which operation must be performed on the stream is indicated in the Mode parameter, and the Field parameter contains the field whose data should be read. The caller is responsible for freeing the stream created by this function.

See also

TBlobField.LoadFromStream

  

Load the field's contents from stream

TBlobField.SaveToStream

  

Save the field's contents to stream


Documentation generated on: Jun 22 2020