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How to convert image data to .jpg

Posted on 2013-11-26
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Last Modified: 2013-11-27
I have a table with uid which is an unique number along with photo of image type.

Can i convert the photo stored as image with
UID.jpg, Please help.
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Question by:searchsanjaysharma
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8 Comments
 
LVL 75

Expert Comment

by:käµfm³d 👽
ID: 39677717
When you say image "data", what format is this data in? Is it a byte array, a base-64 encoding of the bytes, etc.?
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Author Comment

by:searchsanjaysharma
ID: 39677737
image datatype
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LVL 75

Expert Comment

by:käµfm³d 👽
ID: 39677750
OK, when you say "table", do you mean database table?
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Author Comment

by:searchsanjaysharma
ID: 39677768
yes
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LVL 75

Expert Comment

by:käµfm³d 👽
ID: 39677809
SQL Server or Oracle (or other)?
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Author Comment

by:searchsanjaysharma
ID: 39677842
sql server
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LVL 75

Accepted Solution

by:
käµfm³d   👽 earned 2000 total points
ID: 39678243
If I recall correctly, using a DataReader, the data will be returned as a byte array. You can cast the column holding the data into a byte array, and then write those bytes out to disk.

e.g.

SqlDataReader reader = cmd.ExecuteReader();  // I assume you have set up your connection and command objects already

while (reader.Read())
{
    byte[] imgData = (byte[])reader["imgColumn"];
    string uid = (string)reader["uidColumn"];
    string filename = System.IO.Path.ChangeExtension(uid, ".jpg");

    System.IO.File.WriteAllBytes(filename, imgData);
}

Open in new window


If that approach doesn't work for you, then there are some classes that deal with specific SQL server types in .NET. We may need to involve some of those classes.
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Author Closing Comment

by:searchsanjaysharma
ID: 39682668
tx
0

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