Lazarus
Home
Help
TinyPortal
Search
Login
Register
Lazarus
»
Forum
»
Programming
»
Databases
»
[SOLVED] Read Picture from Postgresql Database Unknown Picture Format [blob]
Free Pascal
Website
Downloads
Wiki
Documentation
Bugtracker
Mailing List
Lazarus
Website
Downloads (Laz+FPC)
Packages (OPM)
FAQ
Wiki
Documentation (RTL/FCL/LCL)
Bugtracker
CCR Bugs
IRC channel
GIT
Mailing List
Other languages
Foundation
Website
Useful Wiki Links
Project Roadmap
Getting the Source
Screenshots
How to use the forum
About donations (wiki)
Bookstore
Computer Math and Games in Pascal
(preview)
Lazarus Handbook
Search
Advanced search
Recent
Doomed name
by
Martin_fr
[
Today
at 09:09:52 pm]
Lazarus editor feature re...
by
440bx
[
Today
at 08:52:28 pm]
location of non visual co...
by
cdbc
[
Today
at 08:45:20 pm]
Azure sql database will n...
by
wpflum
[
Today
at 08:14:05 pm]
Directx9 with mylogo insi...
by
d2010
[
Today
at 07:58:05 pm]
Linux Workspaces -- StayO...
by
QEnnay
[
Today
at 06:48:51 pm]
Slow copying of small str...
by
Thaddy
[
Today
at 06:37:29 pm]
lazarus-project_3.2.0-0_a...
by
midigark
[
Today
at 06:09:40 pm]
Text orientation in TMemo...
by
wp
[
Today
at 05:51:25 pm]
TBGRABitmap.TextSize retu...
by
circular
[
Today
at 05:24:04 pm]
BUG REPORT: Unable to gen...
by
gasensor
[
Today
at 05:10:20 pm]
[solved]FP IDE(FP.exe) fa...
by
gasensor
[
Today
at 04:45:40 pm]
Lazarus for Windows on aa...
by
msintle
[
Today
at 04:12:52 pm]
InstallAware Using Lazaru...
by
msintle
[
Today
at 04:09:20 pm]
Inherits forms and releas...
by
ASerge
[
Today
at 03:37:45 pm]
For-in loop over constant...
by
VisualLab
[
Today
at 01:49:14 pm]
The weird Rewrite bug
by
Kays
[
Today
at 01:23:40 pm]
FpDebug unexpected Assemb...
by
440bx
[
Today
at 12:54:43 pm]
Arabic text, problem on L...
by
Zaher
[
Today
at 12:34:05 pm]
RayLib 5.0
by
Guva
[
Today
at 11:25:40 am]
CocoaInt.CocoaIconUse no ...
by
MISV
[
Today
at 09:20:40 am]
Does anyone know why this...
by
TYDQ
[
Today
at 06:39:17 am]
AI, NLP and CAI: Text Gen...
by
schuler
[
Today
at 04:26:36 am]
Demoscene Square dot flag...
by
KodeZwerg
[
Today
at 03:47:30 am]
How does Castle Game Eng...
by
michalis
[
Today
at 02:51:40 am]
« previous
next »
Print
Pages: [
1
]
Author
Topic: [SOLVED] Read Picture from Postgresql Database Unknown Picture Format [blob] (Read 1623 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;
Logged
Print
Pages: [
1
]
« previous
next »
Lazarus
»
Forum
»
Programming
»
Databases
»
[SOLVED] Read Picture from Postgresql Database Unknown Picture Format [blob]
TinyPortal
© 2005-2018