ExtensionMethods.FindDescendant Method
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Overloads
| FindDescendant(DependencyObject, Predicate<DependencyObject>) |
Helper method that finds the first descendant satisfying USE SPARINGLY. This method walks all the tree until a result is found. Use of this method on large trees or excessively will introduce a performance hit. |
| FindDescendant<T>(DependencyObject, Predicate<T>) |
Helper method that finds the first descendant of type USE SPARINGLY. This method walks all the tree until a result is found. Use of this method on large trees or excessively will introduce a performance hit. |
| FindDescendant<T>(DependencyObject) |
Helper method that finds the first descendant of a given Type in the visual tree. USE SPARINGLY. This method walks all the tree until a result is found. Use of this method on large trees or excessively will introduce a performance hit. |
FindDescendant(DependencyObject, Predicate<DependencyObject>)
Helper method that finds the first descendant satisfying predicate.
USE SPARINGLY.
This method walks all the tree until a result is found. Use of this method on large trees or excessively will introduce a performance hit.
public:
[System::Runtime::CompilerServices::Extension]
static System::Windows::DependencyObject ^ FindDescendant(System::Windows::DependencyObject ^ obj, Predicate<System::Windows::DependencyObject ^> ^ predicate);public static System.Windows.DependencyObject FindDescendant (this System.Windows.DependencyObject obj, Predicate<System.Windows.DependencyObject> predicate);static member FindDescendant : System.Windows.DependencyObject * Predicate<System.Windows.DependencyObject> -> System.Windows.DependencyObject<Extension()>
Public Function FindDescendant (obj As DependencyObject, predicate As Predicate(Of DependencyObject)) As DependencyObjectParameters
- obj
- DependencyObject
The object at which to begin searching.
- predicate
- Predicate<DependencyObject>
The predicate which selects the descendant object
Returns
The first descendant that satisfies the predicate, or null if no descendant is found.
Applies to
FindDescendant<T>(DependencyObject, Predicate<T>)
Helper method that finds the first descendant of type T the visual tree
that matches predicate.
USE SPARINGLY.
This method walks all the tree until a result is found. Use of this method on large trees or excessively will introduce a performance hit.
public:
generic <typename T>
where T : class[System::Runtime::CompilerServices::Extension]
static T FindDescendant(System::Windows::DependencyObject ^ obj, Predicate<T> ^ predicate);public static T FindDescendant<T> (this System.Windows.DependencyObject obj, Predicate<T> predicate) where T : class;static member FindDescendant : System.Windows.DependencyObject * Predicate<'T (requires 'T : null)> -> 'T (requires 'T : null)<Extension()>
Public Function FindDescendant(Of T As Class) (obj As DependencyObject, predicate As Predicate(Of T)) As TType Parameters
- T
The type of descendant to find.
Parameters
- obj
- DependencyObject
The object at which to begin searching.
- predicate
- Predicate<T>
The predicate which selects the descendant object
Returns
The first descendant of type T that satisfies the predicate, or null if no descendant is found.
Applies to
FindDescendant<T>(DependencyObject)
Helper method that finds the first descendant of a given Type in the visual tree.
USE SPARINGLY.
This method walks all the tree until a result is found. Use of this method on large trees or excessively will introduce a performance hit.
public:
generic <typename T>
where T : class[System::Runtime::CompilerServices::Extension]
static T FindDescendant(System::Windows::DependencyObject ^ obj);public static T FindDescendant<T> (this System.Windows.DependencyObject obj) where T : class;static member FindDescendant : System.Windows.DependencyObject -> 'T (requires 'T : null)<Extension()>
Public Function FindDescendant(Of T As Class) (obj As DependencyObject) As TType Parameters
- T
The type of descendant to find.
Parameters
- obj
- DependencyObject
The object at which to begin searching.
Returns
The first descendant of type T in the children of obj, or null if no descendant is found.