I have to store a text file in the form of byte array and has to read it back from the database and need to write on text file. What can i Do? I am using sql server 2008 R2 and vb.net
The could use varbinary(max) for the data type in sql. If saving space change max to a smaller number better noted here: http://msdn.microsoft.com/en-us/library/ms188362.aspx
You can convert the text file to byte[] and store it in column of image datatype. When you retrieve this data from data base you will need to type cast to byte[] and using FileStream you can convert it into the file.
Following are some helpful links
http://www.aspdotnet-suresh.com/2011/01/how-to-insert-images-into-database-and.html
http://social.msdn.microsoft.com/Forums/en/netfxbcl/thread/42cec0cb-5761-4aaa-93dc-861b29ee5ea6
Hope this is what you are looking for.
Related
I am not sure I am approaching this project correctly. I have a SQL Server database that contains annotation data for images. The annotation data is stored as a blob data type in the database.
First I tried using a SELECT statement to convert the blob to text:
SELECT CONVERT(varchar(max), CONVERT(varbinary(max), blob_column))
FROM table
Then I used an online tool to convert it from HEX to ASCII. I was able to get more data from it. However, most of the converted text is junk. Below is a screenshot viewed in Notepad++.
Is it possible to convert that junk data into something useful? Is there another approach I should try?
Binary Code
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
I currently have a working SQL stored procedure that is using BCP and xp_cmdshell to create a text file on the system disk and then upload that file into a varbinary field in an Attachments table.
What I'm needing to know is if it is possible to do this without writing a file to disk as part of the process?
UPDATED DETAILS
I am using MSSQL 2014 and the intention is to load the text file (a csv file actually) into the database so that other users can download it.
Is Text File is generating only for pusing content into varbinary fields?if so why dont you use simply convert the content directly into varbinary using convert function and push directly the results into table field.
If i am getting wrong correct me pls.
I have a table in a SQL Server 2008 with images (JPG) stored in a varbinary column. I was wondering if there's a really simple way of converting a varbinary back to a image file.
For example - I'm using Management Studio, and I am able to just right click on my "cell" with the data in hex format (0xFFD8FFDB0084... etc.) I can paste that sting into a text file. Is there a nice tool to execute on that text file to convert it to a binary file?
Unfortunately, i DO NOT have any EXECUTE permission on this database... (Otherwise I would have been able to use BCP.)
The most convenient method of extracting images from my database was to use a PowerShell script explained here
As mentioned by #SqlACID, simply copying the data from the column i SQL Management Studio would truncate the varbinary to 65K.
I have a data that is being extracted from a SQL image datatype into a CSV, then transfered to us via SFTP, and I need to get it back into a image data type. When I try to convert via SSIS I get a buffer overflow message. Is it possible to take a text data stream and convert it into a SQL Image data type?
I have this:
Create Proc CrearNuevoImagen
#imagen image
AS
INSERT INTO
Imagenes(imagen)
VALUES(
#imagen
)
I see that #imagen is of type 'image'.
My question is save that I have an .jpg image, on my front-end (my asp.net website code), how could I convert the .jpg image to fit into the 'image'-type column? Or does the SQL Server automatically do this for me?
Save your image object to a MemoryStream. Then you can take the byte array out of the memory stream and pass that to SQL Server to save it in your "image" or "varbinary" column.
The image column type is just a binary container; SQL Server doesn't interpret or modify the data you store there at all.
See http://www.informit.com/articles/article.aspx?p=377078
The IMAGE type is just a name for a type that can store a byte array. It is now deprecated and you should use the VARBINARY(MAX) type instead. Saving JPG files into the back end database is actually a bit more complex if you care about performance, because of the need to avoid these relatively large files to be copied into memory. Have a look at Download and Upload images from SQL Server via ASP.Net MVC for an example of efficient streaming of image files stored in SQL Server BLOB fields.