Displaying Images in ASP.NET Using HttpHandlers: ASP Alliance

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Displaying Images in ASP.NET Using HttpHandlers

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by Electronic Screw
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Why Http Handlers

Almost everything we do in an HttpHandler, we can simply do it in a normal .aspx page. Then why do we need HttpHandlers? First, the HttpHandlers are more reusable and portable than the normal .aspx pages. Since there are no visual elements in an HttpHandler, they can be easily placed into their own assembly and reused from project to project. Second, HttpHandlers are relatively less expensive than the PageHandler. For a page to be processed at the server, it goes through a set of events (onInit, onLoad, etc.), viewstate and postbacks or simply the complete Page Life Cycle. When you really have nothing to do with the complete page life cycle (like displaying images), HttpHandlers are useful, though the performance hit is negligible.

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User Comments

Title: Very Good article
Name: Jayesh Sorathia
Date: 2013-01-28 2:50:06 AM
Comment:
You can Get Image from Generic HTTP Handler file by implementing HttpHandler interface.
Here is live downloadable C# Examples and VB.Net Examples.
http://jayeshsorathia.blogspot.com/2013/01/net-tips-get-image-from-generic-http-handler-file.html

Title: image display
Name: S.sreelkshmi
Date: 2012-08-31 3:37:10 AM
Comment:
How to display an image into the web page in asp.net

Title: image display .
Name: priya
Date: 2012-02-21 10:40:24 AM
Comment:
how to add image in asp.net using vb with ms access oledb connectivity.display, save, retrieve and delete the image.

Title: Prefent lost Image
Name: Raul
Date: 2011-10-06 3:46:00 PM
Comment:
How to prevent lost image uploaded with ajax upload file control and showded with image Handler on dropdown postback auto postback??

Title: Thanks
Name: Burak TARHANLI (from Turkey)
Date: 2011-10-04 10:28:21 AM
Comment:
This is an excellent article. Thank you so much.

Title: Question...
Name: Hans Peter, Denmark
Date: 2010-02-11 2:21:40 AM
Comment:
I have an image saved into a MSSQL Server as varbinary(MAX). How do I get this image and execute it using a handler?

I have found some code here:
[code]
Public Sub getImage()
Dim connectionString As String
Dim connection As SqlConnection
Dim adapter As New SqlDataAdapter
connectionString = "*******"
Dim UserId As String = System.Web.Security.Membership.GetUser().ProviderUserKey.ToString
connection = New SqlConnection(connectionString)

Dim command As New SqlCommand("SELECT Img1 FROM Nomogram WHERE bID=133", connection)
connection.Open()
Dim pictureData As Byte() = DirectCast(command.ExecuteScalar(), Byte())
connection.Close()
Dim picture As Image = Nothing
'Create a stream in memory containing the bytes that comprise the image.
Using stream As New IO.MemoryStream(pictureData)
'Read the stream and create an Image object from the data.
picture = Image.FromStream(stream)
End Using
End Sub
[/CODE]

Any idead on how to display it`?
Kind regards Hans Peter

Title: give the informaion very easy format
Name: venu
Date: 2008-12-23 9:51:31 AM
Comment:
u will provide the information very easy

Title: Thanks
Name: Gabriel
Date: 2008-11-27 3:53:58 AM
Comment:
Thanks! That was easy and helpful.

Title: please provide the details of storing images in database using asp.net
Name: danny
Date: 2007-10-12 9:36:01 AM
Comment:
please provide the same at the earliest

Title: Response to: Missing a Reference for dsImagesTableAdapters?
Name: Mark
Date: 2007-08-30 9:51:30 AM
Comment:
My bad: I'd put the xsd and xss files in the app_data folder.

Excellent example!

Title: Missing a Reference for dsImagesTableAdapters?
Name: Mark
Date: 2007-08-30 9:26:30 AM
Comment:
Where do we make the reference to the dsImagesTableAdapters?

thanks

Title: nice
Name: abc
Date: 2007-08-24 1:30:55 AM
Comment:
nice concept

Title: ASP.NET
Name: sadat arsalan
Date: 2007-07-21 1:17:42 PM
Comment:
tell me about buttons coding in ASP.NET using HTML codes

Title: Displaying Images in ASP.NET Using HttpHandlers
Name: Electronic Screw
Date: 2007-07-19 5:34:45 AM
Comment:
Yes, you could do that and the content-type was the "key" to that. I'm writing on that and will be available in a couple of days.

Thanks

Title: Displaying Images in ASP.NET Using HttpHandlers
Name: Jeff
Date: 2007-07-18 10:50:17 AM
Comment:
Could you use this same sort of set up to pull things like .doc or .pdf files that might be stored in a database?

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