StrokeCollection.GetPropertyData(Guid) 方法

定義

命名空間:

System.Windows.Ink

組件:

PresentationCore.dll

傳回與指定 Guid 關聯的自訂屬性值。

public:
 System::Object ^ GetPropertyData(Guid propertyDataId);

public object GetPropertyData (Guid propertyDataId);

member this.GetPropertyData : Guid -> obj

Public Function GetPropertyData (propertyDataId As Guid) As Object

參數

propertyDataId

Guid

與要取得之自訂屬性關聯的 Guid。

傳回

Object

與指定 Guid 關聯的自訂屬性值。

例外狀況

ArgumentException

propertyDataId 並未與 StrokeCollection 的自訂屬性關聯。

範例

下列範例示範如何新增和取得自訂屬性資料。 方法 AddTimeStamp_Click 會使用 方法， AddPropertyData 將目前時間新增至 StrokeCollection 。 方法 GetTimeStap_Click 會 GetPropertyData 使用 方法從 StrokeCollection 擷取時間戳記。 此範例假設有 InkCanvas 名為 inkCanvas1 的 。

Guid timestamp = new Guid("12345678-9012-3456-7890-123456789012");

// Add a timestamp to the StrokeCollection.
private void AddTimestamp_Click(object sender, RoutedEventArgs e)
{

    inkCanvas1.Strokes.AddPropertyData(timestamp, DateTime.Now);
}

// Get the timestamp of the StrokeCollection.
private void GetTimestamp_Click(object sender, RoutedEventArgs e)
{

    if (inkCanvas1.Strokes.ContainsPropertyData(timestamp))
    {
        object date = inkCanvas1.Strokes.GetPropertyData(timestamp);

        if (date is DateTime)
        {
            MessageBox.Show("This StrokeCollection's timestamp is " +
                ((DateTime)date).ToString());
        }
    }
    else
    {
        MessageBox.Show(
            "The StrokeCollection does not have a timestamp.");
    }
}

Private timestamp As New Guid("12345678-9012-3456-7890-123456789012")

' Add a timestamp to the StrokeCollection.
Private Sub AddTimestamp_Click(ByVal sender As Object, ByVal e As RoutedEventArgs)

    inkCanvas1.Strokes.AddPropertyData(timestamp, DateTime.Now)

End Sub

' Get the timestamp of the StrokeCollection.
Private Sub GetTimestamp_Click(ByVal sender As Object, ByVal e As RoutedEventArgs)

    If inkCanvas1.Strokes.ContainsPropertyData(timestamp) Then

        Dim savedDate As Object = inkCanvas1.Strokes.GetPropertyData(timestamp)

        If TypeOf savedDate Is DateTime Then
            MessageBox.Show("This StrokeCollection's timestamp is " & _
                CType(savedDate, DateTime).ToString())
        End If
    Else
        MessageBox.Show("The StrokeCollection does not have a timestamp.")
    End If

End Sub

備註

AddPropertyData和 GetPropertyData 方法可讓您將自訂屬性新增至 StrokeCollection 。 然後，您可以使用 來包含額外的資訊 StrokeCollection 。