GetMediaParameter

  • 项目

This method retrieves the value of the specified parameter for an indexed Advanced Stream Redirector (ASX) entry.

Compatibility: Windows Media Player

sRetVal = MediaPlayer.GetMediaParameter( 
  lEntryNum, 
  sName 
)

Parameters

  • lEntryNum
    [in] Long value specifying the index number of an ENTRY element in the ASX file.
  • sName
    [in] BSTR value specifying the NAME attribute of a PARAM element within the specified ENTRY element. This value is not case sensitive.

Return Values

Returns a String value representing the VALUE attribute of the specified PARAM element. This method returns a null value if lEntryNum is outside the range of the EntryCount property, or if no PARAM element within the specified ENTRY element has a NAME attribute equal to sName.

Remarks

The PARAM element allows you to place additional information into an ASX file, which the Windows Media Player control can then access through scripting. For example, you could insert the names of the producers of each media file inside the ASX file and display them in HTML somewhere near the Windows Media Player window.

Use this method to determine the values of the PARAM elements within an ASX ENTRY element. Call the GetMediaParameterName method to determine names associated with PARAM elements.

The first ENTRY element in an ASX file has an lEntryNum index number of 1. Index number 0 is reserved for child elements of the ASX tag, which applies to information valid for the entire show.

An example ASX file might look like the following.

<ASX VERSION="3.0">
  <TITLE>The Title of the Show<TITLE>
  <ENTRY>
    <REF HREF="YourMediaFilename.asf" />
    <TITLE>The Title of the Track</TITLE>
    <PARAM NAME="Producer" VALUE="Jane Doe">
  </ENTRY>
</ASX>

To retrieve the producer information for the first entry, call the method as shown below.

MediaPlayer.GetMediaParameter( 1, "Producer");

This method call would return the string Jane Doe.

Requirements

OS Versions: Windows CE 3.0 and later.

See Also

Windows Media Player Methods | Compatibility Modes | GetMediaParameterName | EntryCount

Last updated on Wednesday, April 13, 2005

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