HitTestResult 类

定义

命名空间:

System.Windows.Media

程序集:

PresentationCore.dll

提供多个派生类的基类，它表示命中测试的返回值。

public ref class HitTestResult abstract

public abstract class HitTestResult

type HitTestResult = class

Public MustInherit Class HitTestResult

继承

Object

HitTestResult

派生

System.Windows.Media.GeometryHitTestResult

System.Windows.Media.Media3D.RayHitTestResult

System.Windows.Media.PointHitTestResult

示例

以下示例演示如何从 HitTest 方法检索HitTestResult返回值。

// Respond to the left mouse button down event by initiating the hit test.
private void OnMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
    // Retrieve the coordinate of the mouse position.
    Point pt = e.GetPosition((UIElement)sender);

    // Perform the hit test against a given portion of the visual object tree.
    HitTestResult result = VisualTreeHelper.HitTest(myCanvas, pt);

    if (result != null)
    {
        // Perform action on hit visual object.
    }
}

' Respond to the left mouse button down event by initiating the hit test.
Private Overloads Sub OnMouseLeftButtonDown(ByVal sender As Object, ByVal e As MouseButtonEventArgs)
    ' Retrieve the coordinate of the mouse position.
    Dim pt As Point = e.GetPosition(CType(sender, UIElement))

    ' Perform the hit test against a given portion of the visual object tree.
    Dim result As HitTestResult = VisualTreeHelper.HitTest(myCanvas, pt)

    If result IsNot Nothing Then
        ' Perform action on hit visual object.
    End If
End Sub

注解

、 PointHitTestResultGeometryHitTestResult和 RayHitTestResult 类派生自 HitTestResult。

属性

VisualHit

获取命中的视觉对象。

方法

Equals(Object)	确定指定对象是否等于当前对象。 (继承自 Object)
GetHashCode()	作为默认哈希函数。 (继承自 Object)
GetType()	获取当前实例的 Type。 (继承自 Object)
MemberwiseClone()	创建当前 Object 的浅表副本。 (继承自 Object)
ToString()	返回表示当前对象的字符串。 (继承自 Object)

另请参阅

• 使用 DrawingVisuals 进行命中操作示例