Seconds (Duration)
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Gets or sets the number of seconds that a Duration object represents.
value = object.Seconds
object.Seconds = value
Property Value
Type: Double
The number of seconds that the Duration object represents.
This property is read/write. The default value is 0.
Remarks
You cannot set the Seconds property as a distinct attribute of a Duration in XAML, because it is not possible to create a Duration element in XAML.
You can set or get the Seconds value in script by using object.property syntax, after getting an existing Duration from a property value such as TimeLine.Duration. If you set the value on a running animation, the value will apply immediately. The new current state of the animation will reflect the progress of the animation that had already run before the change, and that same progress will be applied toward the new Duration. Setting a Seconds value on an animation that previously had Automatic or Forever behavior has this same effect.
If the Duration for an animation is not explicitly set (either through scripting or XAML), the value of object.Duration will be null. In this case, scripting for object.Duration.Seconds will produce an error because object is null.
The Seconds value is the converted summation of all the possible unit inputs for a Duration. For example, a Duration that is created with an attribute value of "0:01:00.555" will have a Seconds value of 60.555. Only the Seconds property exists for getting the representative value in script; there are no JavaScript object model scripting properties for minutes, days, milliseconds, and so on. The Seconds value is 0 for a Duration that was created with an attribute value of "Automatic" or "Forever".