ExtendedProperty.Data - свойство
Обновлен: Ноябрь 2007
Gets or sets the data for the ExtendedProperty object.
Пространство имен: Microsoft.Ink
Сборка: Microsoft.Ink (в Microsoft.Ink.dll)
Синтаксис
'Декларация
Public Property Data As Object
'Применение
Dim instance As ExtendedProperty
Dim value As Object
value = instance.Data
instance.Data = value
public Object Data { get; set; }
public:
property Object^ Data {
Object^ get ();
void set (Object^ value);
}
/** @property */
public Object get_Data()
/** @property */
public void set_Data(Object value)
public function get Data () : Object
public function set Data (value : Object)
Значение свойства
Тип: System.Object
The data for the ExtendedProperty object.
Исключения
Исключение | Условие |
---|---|
ArgumentException | Data is not set to one of the following types: Char array Byte array Int16 array UInt16 array Int32 array UInt32 array Int64 array UInt64 array Single array Double array DateTime array Boolean array Decimal array |
Заметки
The data consists of information that cannot otherwise be set on the object, such as the time or date that a Stroke object was created.
Примеры
This example demonstrates how you can subscribe to the CursorDown event, and the Stroke event to calculate the length of time it takes the user to create a stroke.
At the beginning of a stroke, the CursorDown event fires. The current time is placed into the ExtendedProperties collection of the Stroke object.
Private Sub mInkObject_CursorDown(ByVal sender As Object, ByVal e As InkCollectorCursorDownEventArgs)
' add extended property indicating the time the stroke started
' STROKE_START_GUID is class level string via GUID generator
e.Stroke.ExtendedProperties.Add(New Guid(STROKE_START_GUID), DateTime.Now)
End Sub
private void mInkObject_CursorDown(object sender, InkCollectorCursorDownEventArgs e)
{
// add extended property indicating the time the stroke started
// STROKE_START_GUID is class level string via GUID generator
e.Stroke.ExtendedProperties.Add(new Guid(STROKE_START_GUID), DateTime.Now);
}
When the stroke is complete, the Stroke event fires. The start time is retrieved from the ExtendedProperties collection of the Stroke object, and used to calculate the elapsed time.
Private Sub mInkObject_Stroke1(ByVal sender As Object, ByVal e As InkCollectorStrokeEventArgs)
' check to see if extended property for start time exists
' Attempting to access an extended property that hasn't been created throws an exception
' STROKE_START_GUID is class level string via GUID generator
If (e.Stroke.ExtendedProperties.DoesPropertyExist(New Guid(STROKE_START_GUID))) Then
Dim startTime As DateTime = DirectCast(e.Stroke.ExtendedProperties(New Guid(STROKE_START_GUID)).Data, DateTime)
Dim endTime As DateTime = DateTime.Now
Dim span As TimeSpan = New TimeSpan(endTime.Ticks - startTime.Ticks)
' add extended property indicating the time the stroke ended
' STROKE_END_GUID is class level string via GUID generator
e.Stroke.ExtendedProperties.Add(New Guid(STROKE_END_GUID), endTime)
' display the number of seconds in creating this stroke
Me.statusLabelStrokeTime.Text = span.TotalSeconds.ToString()
End If
End Sub
private void mInkObject_Stroke1(object sender, InkCollectorStrokeEventArgs e)
{
// check to see if extended property for start time exists
// Attempting to access an extended property that hasn't been created throws an exception
// STROKE_START_GUID is class level string via GUID generator
if (e.Stroke.ExtendedProperties.DoesPropertyExist(new Guid(STROKE_START_GUID)))
{
DateTime startTime = (DateTime)e.Stroke.ExtendedProperties[new Guid(STROKE_START_GUID)].Data;
DateTime endTime = DateTime.Now;
TimeSpan span = new TimeSpan(endTime.Ticks - startTime.Ticks);
// add extended property indicating the time the stroke ended
// STROKE_END_GUID is class level string via GUID generator
e.Stroke.ExtendedProperties.Add(new Guid(STROKE_END_GUID), endTime);
// display the number of seconds in creating this stroke
this.statusLabelStrokeTime.Text = span.TotalSeconds.ToString();
}
}
Платформы
Windows Vista
Среды .NET Framework и .NET Compact Framework поддерживают не все версии каждой платформы. Поддерживаемые версии перечислены в разделе Требования к системе для .NET Framework.
Сведения о версии
.NET Framework
Поддерживается в версии: 3.0
См. также
Ссылки
Microsoft.Ink - пространство имен