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Windows Media Player 11 SDK Query.addCondition 

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Query.addCondition

The addCondition method adds a condition to the Query object using AND logic.

Syntax

  player.mediaCollection.createQuery().addCondition(
  attribute
  , operator, value)

Parameters

attribute

String containing the attribute name.

operator

String containing the operator. See Remarks for supported values.

value

String containing the attribute value.

Return Values

This method does not return a value.

Remarks

Compound queries using Query are not case sensitive.

A list of values for the attribute parameter can be found in the Alphabetical Attribute Reference section.

Conditions contained in a Query object are organized into condition groups. Multiple conditions within a condition group are always concatenated using AND logic. Condition groups are always concatenated to each other using OR logic. To start a new condition group, call Query.beginNextGroup.

The following table lists the supported values for operator.

Operator Applies to
BeginsWith Strings
Contains Strings
Equals All types
GreaterThan Numbers, Dates
GreaterThanOrEquals Numbers, Dates
LessThan Numbers, Dates
LessThanOrEquals Numbers, Dates
NotBeginsWith Strings
NotContains Strings
NotEquals All types

Example Code

The following JScript example uses Query.addCondition and Query.beginNextGroup to perform an example query.

// Perform an example query for media for which:
// The genre contains "jazz"
// and the title begins with "a"
// OR the genre contains "jazz"
// and the author begins with "b".

// Create the query object.
var Query = Player.mediaCollection.createQuery();

// Add the first condition group.
Query.addCondition("WM/Genre", "Contains", "jazz");
Query.addCondition("Title", "BeginsWith", "a");

// Begin the new condition group ("or").
Query.beginNextGroup();

// Add the second condition group.
Query.addCondition("WM/Genre", "Contains", "jazz");
Query.addCondition("Author", "BeginsWith", "b");

// Perform the query on "audio" media.
var Playlist = Player.mediaCollection.getPlaylistByQuery(
    Query,      // query
    "audio",    // mediaType
    "",         // sortAttribute
    false);     // sortAscending

Requirements

Version: Windows Media Player 11.

Library: Use wmp.dll.

See Also

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