ExtensionMethods.IsConnectedToPresentationSource Method
Used to determine if a given DependencyObject is rooted in a PresentationSource. In order to determine screen coordinates from relative coordinates, this element has to be rooted in a PresentationSource. It can also tell us whether something is presently in the visual tree or not.
Namespace: Microsoft.VisualStudio.PlatformUI
Assembly: Microsoft.VisualStudio.Shell.10.0 (in Microsoft.VisualStudio.Shell.10.0.dll)
Syntax
'宣言
<ExtensionAttribute> _
Public Shared Function IsConnectedToPresentationSource ( _
obj As DependencyObject _
) As Boolean
'使用
Dim obj As DependencyObject
Dim returnValue As Boolean
returnValue = obj.IsConnectedToPresentationSource()
public static bool IsConnectedToPresentationSource(
this DependencyObject obj
)
[ExtensionAttribute]
public:
static bool IsConnectedToPresentationSource(
DependencyObject^ obj
)
static member IsConnectedToPresentationSource :
obj:DependencyObject -> bool
public static function IsConnectedToPresentationSource(
obj : DependencyObject
) : boolean
Parameters
- obj
Type: System.Windows.DependencyObject
Return Value
Type: System.Boolean
Usage Note
In Visual Basic and C#, you can call this method as an instance method on any object of type DependencyObject. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).
.NET Framework Security
- Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.