StrokeCollection.AddPropertyData(Guid, Object) Method

Reference

Definition

Namespace:: System.Windows.Ink

Assembly:: PresentationCore.dll

Important

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Adds a custom property to the StrokeCollection.

public:
 void AddPropertyData(Guid propertyDataId, System::Object ^ propertyData);

public void AddPropertyData (Guid propertyDataId, object propertyData);

member this.AddPropertyData : Guid * obj -> unit

Public Sub AddPropertyData (propertyDataId As Guid, propertyData As Object)

Parameters

propertyDataId: Guid

The Guid to associate with the custom property.

propertyData: Object

The value of the custom property. propertyData must be of type Char, Byte, Int16, UInt16, Int32, UInt32, Int64, UInt64, Single, Double, DateTime, Boolean, String, Decimal or an array of these data types, except String, which is not allowed.

Exceptions

ArgumentException

propertyDataId is an empty Guid.

-or-

propertyData is not one of the allowed data types listed in the Parameters section.

Examples

The following example demonstrates how to add and get custom property data. The AddTimeStamp_Click method uses the AddPropertyData method to add the current time to the StrokeCollection. The GetTimeStap_Click method uses the GetPropertyData method to retrieve the timestamp from the StrokeCollection. This example assumes that there is an InkCanvas called inkCanvas1.

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

Remarks

The AddPropertyData method enables you to add custom properties to a StrokeCollection. You can then include extra information with a StrokeCollection.

Applies to

Dela via