You want to be able to display a page of images stored in your database in thumbnail format.
Implement the first of the two ASP.NET pages described in
Recipe 12.3, changing the
Page_Load method in the code-behind class to scale
the full-sized image retrieved from the database to the appropriate
size for a thumbnail presentation.
Page_Load method of the code-behind class
for the page, use the .NET language of your choice to:
System.Drawing.Image object from the byte
array retrieved from the database.
Use a constant to define the height of the thumbnail and then calculate the width to maintain the aspect ratio of the image.
GetThumbnailImage method of the
Image object to scale the image to the desired
Load the thumbnail image into a
then write it to the
Example 12-16 and Example 12-17 show the VB and C# code-behind class for our
example that illustrates this solution. (See the
file and VB and C# code-behind files in Recipe 12.3 for our starting point.)
To display the thumbnails, create another ASP.NET page, add a
DataList control with image tags in the
ItemTemplate, and then use data binding to set the
src attributes of the image tags.
.aspx file for the page:
DataList control to provide the ability to
generate a list using data binding.
HeaderTemplate to label the table of images.
ItemTemplate to define an image that is displayed ...