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9.3

create thumbnails on upload or similar

Asked by forsters in Web Images, Adobe Dreamweaver, Programming for ASP.NET

Hi all, one for the weekend.

I'm trying to build a gallery of thumbnails from a database of full-size stock images.

I've used a ASP:datalist with a RepeatColumns property to get started but I now find I have two problems one I dont know how to paginate it and more importantly although I'm setting the image height to 100px to give me a thumbnail view behind the scenes my page is trying to find load and control the view of currently 500 odd full-size images before showing me the scaled down view of them. Not suprisingly I waited a very very long time before anything appeared on my screen.
How should I approach this?
Do I need to create actual thumbnails of all the images in the database, is there a better way?

Ideally I want people to be able to upload a new image to the database without having to make a thumbnail copy each time.

So i'm looking either for a way to automate it so that on upload a thumnail version is created, databased and saved too. Or a way of handling the actual images sizes into a temporary thumnail view without grinding to a halt.

Or quite frankly any suggestions - never done this before and not sure where to begin.

I'm using dreamweaver8 and code in ASP.net vb database is SQL, enough javascript knowledege to copy paste a bit of code in thats about it, some previus use of jquery but no idea how to integrate the galleries with the database side of things.

My sample code so far is attached.

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             <html xmlns="http://www.w3.org/1999/xhtml">
<head>
 
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Untitled Document</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:DataList
id="dlstOriginals"
DataSourceID="srcImagesOriginals"
RepeatColumns="8"
Gridlines="Both"
Runat="server">
<ItemTemplate>
<img src="http://mysite/ImageSite/originals/<%#Eval("OriginalName")%>" height="100px"/>
</ItemTemplate>
</asp:DataList>
 
<asp:SqlDataSource
id="srcImagesOriginals"
ConnectionString="<%$ ConnectionStrings:DatabaseName %>"
SelectCommand="SELECT OriginalName
FROM ImagesOriginals"
Runat="server" />
</div>
</form>
 
    
 
</body>
</html>

           
         

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create thumbnails on upload or similar

Asked by forsters in Web Images, Adobe Dreamweaver, Programming for ASP.NET

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