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[SOLVED] Read Picture from Postgresql Database Unknown Picture Format [blob]
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Topic: [SOLVED] Read Picture from Postgresql Database Unknown Picture Format [blob] (Read 1687 times)
heejit
Full Member
Posts: 245
[SOLVED] Read Picture from Postgresql Database Unknown Picture Format [blob]
«
on:
March 19, 2019, 05:48:21 pm »
Code: Pascal
[Select]
[+]
[-]
Working
:
astream
:
TStream
astream
:
=
m_qry
.
CreateBlobStream
(
m_qry
.
FieldByName
(
'file_data'
)
,
bmRead
)
;
self
.
imgWidget
.
Picture
.
LoadFromStream
(
astream
)
;
Not
Working
:
Unknown Picture Format
astream
:
TMemoryStream
TBlobField
(
self
.
m_qry
.
FieldByName
(
'file_data'
)
)
.
SaveToStream
(
astream
)
;
self
.
imgWidget
.
Picture
.
LoadFromStream
(
astream
)
;
In documentation also it suggested to use TBlobField :
https://www.freepascal.org/docs-html/fcl/db/tdataset.createblobstream.html
Then why there is format Error?
Development Env:
Lazarus : 2.0
Feepascal : 3.0.4
SVN Rev : 60350M
OS : Linux 64bit Ubuntu 16.04
«
Last Edit: March 31, 2019, 03:10:00 pm by jshah
»
Logged
heejit
Full Member
Posts: 245
Re: Read Picture from Postgresql Database Unknown Picture Format [blob, postgresql]
«
Reply #1 on:
March 31, 2019, 03:09:37 pm »
Solved
We need to move the position of stream to beginning
astream.Position:=0;
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[SOLVED] Read Picture from Postgresql Database Unknown Picture Format [blob]
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