Version: 4.0.4.0
Ajax technology accesses server-side power using callbacks without reloading the browser page. Easily create Rich Internet Applications without writing JavaScript!

LiveImage ASP.NET Server Control Information

This page includes information about the LiveImage Server Control, which is included in PowerWEB LiveControls for ASP.NET:

[View LiveControl Demo]

The LiveImage server control represents an HTML image which can have it's src attribute changed (as well as other client-side properties) from within a remote-scripted callback without refreshing the browser.

Remember! Any LiveControl which raises a callback to the server (such as LiveTimer) raises a server event within which ANY client-side element can be visually updated without refreshing the page!

The LiveImage control has the following features:

  • Cross-browser compatible, no plugins, downloads, or security warnings.
  • Use the server MouseEnter, MouseLeave effects to create an image swap effect.
  • Use in conjunction with the LiveTimer to create an automated slide show.

 

Browser Compatibility

LiveControls have been tested and are fully "callback-compatible" in the following browsers:

  • Microsoft Internet Explorer 5.0+ for Windows
  • Microsoft Interner Explorer 5.0+ for Macintosh
  • Netscape 7.1+ for Windows
  • Netscape 7.1+ for Macintosh OS X
  • Mozilla 1.3+ for Windows
  • Mozilla 1.3+ for Macintosh OS X
  • Firefox for Windows
  • Firefox for Macintosh OS X
  • Camino for Macintosh OS X
  • Konqueror based engines
  • Galeon
  • Opera 5.0+

If a browser which is not compatible accesses a page containing LiveControls, the controls will fall back to the standard ASP.NET functionality. For example, a LiveButton issues a transparent callback when clicked. If on a non-compatible page, the button will still be displayed, but will cause a standard postback when clicked.

Server Tag Example

The following tags demonstrate typical settings for initializing a LiveImage

<cc1:LiveImage id="LiveImage1" runat="server" ImageUrl="myimg.gif"></cc1:LiveImage>

Code-Behind Example

The following code demonstrates using the MouseEnter and MouseLeave server events to make an image swap effect.

private void LiveImage1_MouseEnter(object sender, Dart.PowerWEB.LiveControls.LocationEventArgs e)
{
   LiveImage1.ImageUrl = "image1.gif";
}

private void LiveImage1_MouseLeave(object sender, Dart.PowerWEB.LiveControls.LocationEventArgs e)
{
   LiveImage1.ImageUrl = "image2.gif";
}