473,499 Members | 1,747 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

extract blob from database

I would like to be able to extract a BLOB from the database (SqlServer)
and pass it to a browser without writing it to a file. (The BLOB's
are word doc's, MS project doc's, and Excel spreadsheets.

How can I do this?
Nov 15 '05 #1
3 3772
Hello,

I can help you with the first bit, extracting the blob from the database.

Create a SqlCommand to select it, e.g. "SELECT Blob FROM DataTable WHERE
<some criteria>". Then use ExecuteScalar to retrieve the result and cast it
to a byte array:
byte[] blob = (byte[])cmd.ExecuteScalar();

But I don't know what you need to do next, sorry. I'm sure somebody else
will know.
"Selen" <sk*****@yahoo.com> wrote in message
news:uE**************@TK2MSFTNGP11.phx.gbl...
I would like to be able to extract a BLOB from the database (SqlServer)
and pass it to a browser without writing it to a file. (The BLOB's
are word doc's, MS project doc's, and Excel spreadsheets.

How can I do this?

Nov 15 '05 #2
Response.Clear();
Response.AddHeader( "content-disposition", "attachment;
filename=\"Stuff.doc\"");
Response.ContentType = "application/msword";
// (or whatever the appropriate MIIME type)
Response.BinaryWrite( blob); // your byte array

// above is untested but you get the idea...
Your choices are "inline" or "attachment". If you choose "inline" then the
response
may be displayed in the browser if it so chooses
depending on the setting of the ContentType. If you choose "attachment" the
user will
always be prompted to save or open.

"Selen" <sk*****@yahoo.com> wrote in message
news:uE**************@TK2MSFTNGP11.phx.gbl...
I would like to be able to extract a BLOB from the database (SqlServer)
and pass it to a browser without writing it to a file. (The BLOB's
are word doc's, MS project doc's, and Excel spreadsheets.

How can I do this?

Nov 15 '05 #3
Response.Clear();
Response.AddHeader( "content-disposition", "attachment;
filename=\"Stuff.doc\"");
Response.ContentType = "application/msword";
// (or whatever the appropriate MIIME type)
Response.BinaryWrite( blob); // your byte array

// above is untested but you get the idea...
Your choices are "inline" or "attachment". If you choose "inline" then the
response
may be displayed in the browser if it so chooses
depending on the setting of the ContentType. If you choose "attachment" the
user will
always be prompted to save or open.

"Selen" <sk*****@yahoo.com> wrote in message
news:uE**************@TK2MSFTNGP11.phx.gbl...
I would like to be able to extract a BLOB from the database (SqlServer)
and pass it to a browser without writing it to a file. (The BLOB's
are word doc's, MS project doc's, and Excel spreadsheets.

How can I do this?

Nov 15 '05 #4

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

7
7066
by: John | last post by:
I have over 5000 thumbnail pictures of size 5kb each. I would like to able to load all 5000 pictures and view 50 per page using mysql_data_seek(). I would like to know what are the advantages and...
5
2660
by: Bob Kaku | last post by:
I've created a MySQL database to store a large amount of text. Since the text data type in MySQL is limited to 255 characters, I added a BLOB column. I created an PHP input screen to enter the...
6
5658
by: Juergen Gerner | last post by:
Hello Python fans, I'm trying and searching for many days for an acceptable solution... without success. I want to store files in a database using BLOB fields. The database table has an ID field...
0
2252
by: REM | last post by:
I have some problems. It's dilemma between BLOB, BFILE and takes care of file on file system. What it's advantage?? I import some PDF document in BLOB filed in my database. It's about 1000...
3
4698
by: hamvil79 | last post by:
I'm implementig a java web application using MySQL as database. The main function of the application is basically to redistribuite documents. Those documents (PDF, DOC with an average size around...
9
378
by: Hrvoje Voda | last post by:
I wrote this code to save a blob data into database. What is wrong? public ArrayList SetProfile(byte Profile) { ArrayList arrayProfile = new ArrayList ();
6
2209
by: Selen | last post by:
I would like to be able to extract a BLOB from the database (SqlServer) and pass it to a browser without writing it to a file. (The BLOB's are word doc's, MS project doc's, and Excel spreadsheets....
10
5200
by: Peter Stojkovic | last post by:
I want store an integer-array of 1000 Values in a blob in a SQL-database. I will do this every 10 Seconds. How can I do this ???? What datatypes a have to use ??? Thanks
2
6485
by: Vinciz | last post by:
hi guys... im new in java and i would love to learn some of these... basically i got a sample code to retrieve the blob from the mysql. however, i dont really know what to do with these...
0
7134
marktang
by: marktang | last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However,...
0
7012
by: Hystou | last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can...
0
7180
Oralloy
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers,...
0
7225
jinu1996
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven...
1
6901
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows...
0
5479
agi2029
by: agi2029 | last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing,...
1
4920
isladogs
by: isladogs | last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM). In this session, we are pleased to welcome a new...
0
3101
by: adsilva | last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
0
1429
by: 6302768590 | last post by:
Hai team i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated ...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.