StylusPointDescription.HasProperty(StylusPointProperty) 方法

定义

命名空间:

System.Windows.Input

程序集:

PresentationCore.dll

返回一个指示当前 StylusPointDescription 是否具有指定属性的值。

public:
 bool HasProperty(System::Windows::Input::StylusPointProperty ^ stylusPointProperty);

public bool HasProperty (System.Windows.Input.StylusPointProperty stylusPointProperty);

member this.HasProperty : System.Windows.Input.StylusPointProperty -> bool

Public Function HasProperty (stylusPointProperty As StylusPointProperty) As Boolean

参数

stylusPointProperty

StylusPointProperty

要在 StylusPointProperty 中检查的 StylusPointDescription。

返回

Boolean

如果 StylusPointDescription 具有指定 StylusPointProperty，则为 true；否则为 false。

示例

以下示例演示如何从 StylusPointDescription获取有关 属性的信息。 此示例假定 StylusMove 事件已连接到事件处理程序。

void inkCanvas1_StylusMove(object sender, StylusEventArgs e)
{
    StylusPointCollection points = e.GetStylusPoints(inkCanvas1);
    StylusPointDescription description = points.Description;
    StringWriter normalPressureInfo = new StringWriter();

    if (description.HasProperty(StylusPointProperties.NormalPressure))
    {
        StylusPointPropertyInfo propertyInfo = 
            description.GetPropertyInfo(StylusPointProperties.NormalPressure);

        normalPressureInfo.WriteLine("  Guid = {0}", propertyInfo.Id.ToString());
        normalPressureInfo.Write("  Min = {0}", propertyInfo.Minimum.ToString());
        normalPressureInfo.Write("  Max = {0}", propertyInfo.Maximum.ToString());
        normalPressureInfo.Write("  Unit = {0}", propertyInfo.Unit.ToString());
        normalPressureInfo.WriteLine("  Res = {0}", propertyInfo.Resolution.ToString());
    }
}

Private Sub inkCanvas1_StylusMove(ByVal sender As Object, ByVal e As StylusEventArgs)
    Dim points As StylusPointCollection = e.GetStylusPoints(inkCanvas1)
    Dim description As StylusPointDescription = points.Description
    Dim normalPressureInfo As New StringWriter()

    If description.HasProperty(StylusPointProperties.NormalPressure) Then

        Dim propertyInfo As StylusPointPropertyInfo = _
            description.GetPropertyInfo(StylusPointProperties.NormalPressure)

        normalPressureInfo.WriteLine("  Guid = {0}", propertyInfo.Id.ToString())
        normalPressureInfo.Write("  Min = {0}", propertyInfo.Minimum.ToString())
        normalPressureInfo.Write("  Max = {0}", propertyInfo.Maximum.ToString())
        normalPressureInfo.Write("  Unit = {0}", propertyInfo.Unit.ToString())
        normalPressureInfo.WriteLine("  Res = {0}", propertyInfo.Resolution.ToString())
    End If

End Sub