RecognizerContextRecognitionWithAlternatesEventArgs.CustomData Property

Artículo
12/12/2007

Gets the object that contains the custom data for the recognition result.

Namespace: Microsoft.Ink
Assembly: Microsoft.Ink (in microsoft.ink.dll)

Syntax

'Declaration
Public ReadOnly Property CustomData As Object
'Usage
Dim instance As RecognizerContextRecognitionWithAlternatesEventArgs
Dim value As Object

value = instance.CustomData

public Object CustomData { get; }

public:
property Object^ CustomData {
    Object^ get ();
}

/** @property */
public Object get_CustomData ()

public function get CustomData () : Object

Not applicable.

Property Value

The custom data for the recognition result.

Remarks

You can supply custom data when you call the BackgroundRecognizeWithAlternates method of the RecognizerContext object. When the RecognizerContext object raises the RecognitionWithAlternates event, the custom data will be available in the CustomData property of the RecognizerContextRecognitionWithAlternatesEventArgs object.

Example

This C# example is from a Form, RecognitionWithAlternatesEventForm, that performs background recognition with alternates by calling the BackgroundRecognizeWithAlternates method of the RecognizerContext object, theRecognizerContext, as each stroke is collected and displays the result along with all of its alternates in descending order of confidence in the ListBox control, listAlternates, as they are generated.

A time stamp is used in the call to the BackgroundRecognizeWithAlternates method. The event handler for the RecognitionWithAlternates event, RecognitionWithAlternates_Event, retrieves the time stamp by checking the CustomData property of the event arguments.

private Microsoft.Ink.InkCollector theInkCollector;
private Microsoft.Ink.Strokes theStrokes;
private Microsoft.Ink.RecognizerContext theRecognizerContext;
private Microsoft.Ink.RecognitionResult theRecognitionResult;

private System.Windows.Forms.ListBox listAlternates;

// Event handler for the form's Load event
private void RecognitionWithAlternatesEventForm_Load(object sender, System.EventArgs e)
{
    // Create a new ink collector and recognizer context.
    this.theInkCollector = new Microsoft.Ink.InkCollector(this.Handle);
    this.theRecognizerContext = new Microsoft.Ink.RecognizerContext();

    // Initialize the RecognizerContext object's strokes.
    this.theStrokes = this.theInkCollector.Ink.Strokes;
    this.theRecognizerContext.Strokes = this.theStrokes;

    // Attach event handlers.
    this.theInkCollector.Stroke +=
        new InkCollectorStrokeEventHandler(this.Stroke_Event);
    this.theRecognizerContext.RecognitionWithAlternates +=
        new RecognizerContextRecognitionWithAlternatesEventHandler(
        this.RecognitionWithAlternates_Event);

    // Enable the ink collector
    this.theInkCollector.Enabled = true;
}

// Stroke event handler
private void Stroke_Event(object sender,
    InkCollectorStrokeEventArgs e)
{
    // When a new stroke is collected,
    // add it to the recognizer's strokes collection.
    this.theStrokes.Add(e.Stroke);

    // Tell the context to recognize its strokes.
    // Add a time stamp as custom data for the RecognitionWithAlternates event.
    DateTime timeStamp = DateTime.Now;
    this.theRecognizerContext.BackgroundRecognizeWithAlternates(timeStamp);
}

// Recognition Event Handler
private void RecognitionWithAlternates_Event(
    object sender,
    RecognizerContextRecognitionWithAlternatesEventArgs e)
{
    this.theRecognitionResult = e.Result;
    Microsoft.Ink.RecognitionAlternates theRecognitionAlternates =
        this.theRecognitionResult.GetAlternatesFromSelection(0, -1);

    // Update the Text box
    this.listAlternates.Items.Clear();
    this.listAlternates.Items.Add("The recognition status is: " + e.RecognitionStatus.ToString());
    this.listAlternates.Items.Add("The time stamp is: " + ((DateTime)e.CustomData).ToString());
    foreach (Microsoft.Ink.RecognitionAlternate theRecognitionAlternate in theRecognitionAlternates)
    {
        this.listAlternates.Items.Add(theRecognitionAlternate.ToString());
    }
}

// Event handler for the form's closed event
private void RecognitionWithAlternatesEventForm_Closed(object sender, System.EventArgs e)
{
    this.theInkCollector.Dispose();
    this.theInkCollector = null;
    this.theRecognizerContext.Dispose();
    this.theRecognizerContext = null;
}

This Microsoft® Visual Basic® .NET example is from a Form, RecognitionWithAlternatesEventForm, that performs background recognition with alternates by calling the BackgroundRecognizeWithAlternates method of the RecognizerContext object, theRecognizerContext, as each stroke is collected and displays the result along with all of its alternates in descending order of confidence in the ListBox control, listAlternates, as they are generated.

Private WithEvents theInkCollector As Microsoft.Ink.InkCollector
Private WithEvents theRecognizerContext As Microsoft.Ink.RecognizerContext
Private theStrokes As Microsoft.Ink.Strokes
Private theRecognitionResult As Microsoft.Ink.RecognitionResult

' Event handler for the form's Load event.
Private Sub RecognitionWithAlternatesEventForm_Load(ByVal sender As System.Object, _
    ByVal e As System.EventArgs) Handles MyBase.Load
    ' Create a new ink collector and recognizer context.
    Me.theInkCollector = New Microsoft.Ink.InkCollector(Me.Handle)
    Me.theRecognizerContext = New Microsoft.Ink.RecognizerContext

    ' Initialize the RecognizerContext object's strokes
    Me.theStrokes = Me.theInkCollector.Ink.Strokes
    Me.theRecognizerContext.Strokes = Me.theStrokes

    ' Enable the ink collector
    Me.theInkCollector.Enabled = True
End Sub

' Stroke event handler.
Private Sub Stroke_Event(ByVal sender As Object, _
    ByVal e As Microsoft.Ink.InkCollectorStrokeEventArgs) Handles theInkCollector.Stroke

    ' When a new stroke is collected,
    ' add it to the recognizer's strokes collection.
    Me.theStrokes.Add(e.Stroke)

    ' Tell the context to recognize its strokes.
    ' Add a time stamp as custom data for the RecognitionWithAlternates event.
    Dim timeStamp As System.DateTime = DateTime.Now
    Me.theRecognizerContext.BackgroundRecognizeWithAlternates(timeStamp)
End Sub

' Recognition Event Handler.
Private Sub RecognitionWithAlternates_Event(ByVal sender As Object, _
    ByVal e As Microsoft.Ink.RecognizerContextRecognitionWithAlternatesEventArgs) _
    Handles theRecognizerContext.RecognitionWithAlternates

    Me.theRecognitionResult = e.Result
    Dim theRecognitionAlternates As Microsoft.Ink.RecognitionAlternates = _
        Me.theRecognitionResult.GetAlternatesFromSelection(0, -1)

    ' Update the Text box
    Me.listAlternates.Items.Clear()
    Me.listAlternates.Items.Add("The recognition status is: " & _
        e.RecognitionStatus.ToString())
    Me.listAlternates.Items.Add("The time stamp is: " & _
        DirectCast(e.CustomData, System.DateTime).ToString())

    For Each theRecognitionAlternate As Microsoft.Ink.RecognitionAlternate In theRecognitionAlternates
        Me.listAlternates.Items.Add(theRecognitionAlternate.ToString())
    Next
End Sub

' Event handler for the form's closed event.
Private Sub RecognitionWithAlternatesEventForm_Closed(ByVal sender As Object, _
    ByVal e As System.EventArgs) Handles MyBase.Closed
    Me.theInkCollector.Dispose()
    Me.theInkCollector = Nothing
    Me.theRecognizerContext.Dispose()
    Me.theRecognizerContext = Nothing
End Sub

Platforms

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

Version Information

.NET Framework

Supported in: 3.0

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