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StrokeCollection.ContainsPropertyData Method

Returns whether the specified custom property identifier is in the StrokeCollection.

Namespace:  System.Windows.Ink
Assembly:  PresentationCore (in PresentationCore.dll)

public bool ContainsPropertyData(
	Guid propertyDataId
)

Parameters

propertyDataId
Type: System.Guid

The Guid to locate in the StrokeCollection.

Return Value

Type: System.Boolean
true if the specified custom property identifier is in the StrokeCollection; otherwise, false.

The following example demonstrates how to check for custom property in a StrokeCollection. If a custom property has been associated with timestamp, the example gets that custom property and shows when the StrokeCollection was saved. 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.");
    }
}

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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