How to convert image data to .jpg

Posted on 2013-11-26
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.
Question by:searchsanjaysharma
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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.?

Author Comment

ID: 39677737
image datatype
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Expert Comment

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

ID: 39677768
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Expert Comment

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

Author Comment

ID: 39677842
sql server
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Accepted Solution

käµfm³d   👽 earned 500 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.


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);

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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.

Author Closing Comment

ID: 39682668

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