Network.downloadProgress

Artigo
4/26/2023

[The feature associated with this page, Windows Media Player SDK, is a legacy feature. It has been superseded by MediaPlayer. MediaPlayer has been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer instead of Windows Media Player SDK, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]

The downloadProgress property retrieves the percentage of download completed.

Syntax

player.network.downloadProgress

Possible Values

This property is a read-only Number (long).

Remarks

When the Windows Media Player control is connected to a media file that can be played and downloaded at the same time, the downloadProgress property returns the percentage of the total file that has been downloaded. This feature is currently supported only on web servers. The following file formats can be downloaded and played simultaneously:

Advanced Systems Format (ASF)
Windows Media Audio (WMA)
Windows Media Video (WMV)
MP3
MPEG
WAV
Some AVI files

Use the Player.Buffering event to determine when the downloading begins and ends.

Examples

The following JScript example uses Network.downloadProgress to display the percentage of downloading completed. The information is displayed in an HTML DIV created with ID = "DP". The example uses a timer with a 1 second interval to update the display. The Player object was created with ID = "Player".

<!-- Create an event handler for buffering. -->
<SCRIPT FOR = Player EVENT = buffering(Start)>
   var idI; // Variable for the interval id.
   
   // Test whether downloading has started or stopped.
   if (true == Start){ 
      // Start the timer. Call the function to update the display.
      idI = window.setInterval("UpdateDP()", 1000);
   }
   else{
      // Downloading is complete. Stop the timer.
      window.clearInterval(idI);
   }
</SCRIPT>

<!-- Put the function to update the display in a separate code block. -->
<SCRIPT>
function UpdateDP(){
   DP.innerHTML = "";
   DP.innerHTML = "Download progress: " + Player.network.downloadProgress;
   DP.innerHTML += " percent complete";
}
</SCRIPT>

Requirements

Requirement	Value
Version	Windows Media Player version 7.0 or later.
DLL	Wmp.dll

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