By (DoubleAnimation)

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Gets or sets the total amount by which the animation changes its starting value.

<object By="Double"  .../>

value = object.By
object.By = value

Property Value

Type: Double

The total amount by which the animation changes its starting value.

This property is read/write. The default value is null.

Managed Equivalent

By

Remarks

Use the By property when you want to animate a value by a certain amount instead of specifying a starting or ending value. You may also use the By property with the From property.

The following table summarizes how the From, To, and By properties may be used together or separately to determine an animation's target values.

Properties specified	Resulting behavior
From	The animation progresses from the value specified by the From property to the base value of the property that is being animated.
From and To	The animation progresses from the value specified by the From property to the value specified by the To property.
From and By	The animation progresses from the value specified by the From property to the value specified by the sum of the From and By properties.
To	The animation progresses from the animated property's base value or a previous animation's output value to the value specified by the To property.
By	The animation progresses from the base value of the property that is being animated or a previous animation's output value to the sum of that value and the value specified by the By property.

Note:
If you set both the To and By properties, the To property takes precedence and the By property is ignored.

To use other interpolation methods or to animate between more than two target values, use a DoubleAnimationUsingKeyFrames object.

Applies To

DoubleAnimation