IsValid Element

Defines a rule condition based on whether a source can be queried without error (for example, there are no null values).

Syntax

<IsValid
    Source="ObjectPath element"
/>

Attributes

Source

An object path in the form [ObjectName.Member] that indicates the source of the condition.

Remarks

Check to make sure that the entire path can be evaluated (without encountering nulls mid-path).

Requirements

Platform: Windows Vista Ultimate, Windows Vista Home Premium, and later

See Also

• Media Center Markup Language Reference
• Sample Explorer
• Media Center Markup Language Verifier