项目
11/18/2011

VisualTransition.From Property

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Gets or sets the name of the VisualState to transition from.

Namespace: System.Windows
Assembly: System.Windows (in System.Windows.dll)

Syntax

'Declaration
Public Property From As String

public string From { get; set; }

<object From="stateName"/>

XAML Values

stateName
The name of the VisualState to transition from.

Property Value

Type: System.String
The name of the VisualState to transition from.

Remarks

The From property is optional. A VisualTransition can be restricted to apply to only certain states or it can be applied any time the control transitions between states. You restrict when a VisualTransition is applied by setting the To and From properties. The following table describes the levels of restriction from most restrictive to least restrictive.

Type of restriction	Value of From	Value of To
From a specified state to another specified state	The name of a VisualState	The name of a VisualState
From any state to a specified state	Not set	The name of a VisualState
From a specified state to any state	The name of a VisualState	Not set
From any state to any other state	Not set	Not set

You can have multiple VisualTransition objects in a VisualStateGroup that refer to the same state, but they will be used in the order that the table above specifies.

You can change this behavior by creating a new class that inherits from VisualStateManager and overriding the GoToStateCore method.

Examples

The following example creates two VisualTransition objects. When the control transitions from the Pressed state to the MouseOver state, the VisualTransition that has both From and To set is used. When the control transitions from a state that is not Pressed to the MouseOver state, the other state is used.

<!--Take one half second to trasition to the MouseOver state.-->
<VisualTransition To="MouseOver" 
                      GeneratedDuration="0:0:0.5" />

<!--Take one hundredth of a second to transition from the
    Pressed state to the MouseOver state.-->
<VisualTransition From="Pressed" To="MouseOver" 
                      GeneratedDuration="0:0:0.01" />

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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