ASP.Net Listview & AJAX Update Panel

I have to create a listview which contains thumbnails of few items, and when we click on the more button it should display rest of the items in the same listview,. how do i achive this, i dont want to do a postback and i would like 开发者_如何转开发to do this with ASP.Net Listview and AJAX Update Panel,

i went through the web and seems ppl are finding difficulties in this, do you have any suggestions or tips in doing this, any help is much appreciated.

Should be fairly simple.

Use a Take() for your initial small sample databind and don't for the full one.

Something like:

class Blah
 {
     private const sampleNumber = 10;


   overrides OnLoad(...)
   {
    this.DataBind();
   }

   protected MoreButtonHandler(...)
   {
      this.DataBind(false);
   }


   overrides protected DataBind()
   {
    this.DataBind(true);
   }

   (shadows?) overrides protected  DataBind(bool sampleOnly)
   {

     var thumbnails = this.loadThumbnails();
     if(sampleOnly)
      thumbnails = thumbnails.Take(Blah.sampleNumber);

     this.listview.datasource = thumbnails ;
     mybase.DataBind();

   }

   private IEnumerable<Thumbnail> loadThumbnails()
   {
     etc...
   }
}