Data.SqlExpr.TCustomSQLDataSet.CreateBlobStream
| [–] Properties | |
|---|---|
| Type: function | |
| Visibility: public | |
| Source: Data.SqlExpr.pas Data.SqlExpr.hpp
| |
| Unit: Data.SqlExpr | |
| Parent: TCustomSQLDataSet | |
Delphi
function CreateBlobStream(Field: TField; Mode: TBlobStreamMode): TStream; override;
C++
virtual System::Classes::TStream* __fastcall CreateBlobStream(Data::Db::TField* Field, Data::Db::TBlobStreamMode Mode);
Description
Creates a blob stream for a Binary large object (BLOB) field in the dataset.
Call CreateBlobStream to obtain a stream for reading and writing the value of the field specified by the Field parameter.
Field is a string containing the name of the BLOB field in the dataset. It must be an instance of TBlobField or one of its descendants.
Mode indicates whether the stream will be used for reading the field's value (bmRead), writing the field's value (bmWrite), or both (bmReadWrite).
CreateBlobStream returns the stream you can use for reading or writing data.