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Retrieve image from SQL Server using vb.net

Posted on 2013-06-19
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Last Modified: 2013-08-15
I have tried probably 10 different ways to get my .net application to display the images that are stored on my SQL server as type "image".  The latest attempt is from this web site.  I used the vb code.  The uploaded images save in the database and have the proper size, but when it comes time to retrieve them, I get back only the broken image symbol.  Debugging does not show any errors.  Can anyone figure out why this would be?  (As an aside, I cannot for the life of me figure out why clicking the submit button causes the submission to happen twice!)
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Question by:tdisher
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by:SAMIR BHOGAYTA
ID: 39261549
hi...

you just have to retrieve images from database through the reader. If you stored image height and width into database so it also you can retrieve with reader and you just write the following code

ltImage.Text = "<img src='../PathofImage/' & reader.item("ImageField")">"
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by:Robert Schutt
ID: 39265273
I have downloaded the source code (from the dotnetcurry skydrive) and it works when I put it in a simple website. However, I have tried to add it to an existing web project for debugging and failed so maybe you have a similar problem? In that case some more info might be needed to find out what the actual problem is. When I tested it, I made some mistakes with database permissions but since you are seeing the records in the database I guess you've passed that station.

The 'aside' problem you mention (duplicate submit) is also mentioned in the comments on the page: it's ok in the download but from the aspx code posted on the page you have to remove
onclick="btnSubmit_Click"

Open in new window

which is only needed in the C# version, the VB version has this code instead, defined after the Sub:
Handles btnSubmit.Click

Open in new window


I did also see mention of this double submit causing empty image records so it could actually solve your problem?!

If not, can you retrieve an image directly? Try something like ...//your_website_and_path/ShowImage.ashx?id=1
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by:tdisher
ID: 39265969
When I created a completely new web site, the dotnetcurry code worked perfectly.  When I changed the sql to perform the lookup to my production database, it fails.  I have to believe there is something wrong with the data being stored in my production database.  Removing the onclick = did fix the duplicate record issue.
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Robert Schutt earned 1500 total points
ID: 39266142
If you're convinced that is the problem you could try using a small picture and copy/pasting the actual value from the table here (to see if that data works when I put it in my database). Although I'm a bit confused by your latest post versus your earlier remark "The uploaded images save in the database and have the proper size". Did you try the last proposal in my previous post?
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