データのバインド

Imports System.ComponentModel

Public Class BarcodeData Implements INotifyPropertyChanged
        Public Sub New()
                Data = String.Empty
        End Sub
        Private barcodeData As String
        Property Data() As String
                Get
                        Return barcodeData
                End Get
                Set(ByVal value As String)
                        barcodeData = value
                        RaisePropertyChanged()
                End Set
        End Property
        Public Event PropertyChanged(ByVal sender As Object, ByVal e
                As PropertyChangedEventArgs) Implements
                      INotifyPropertyChanged.PropertyChanged
        Private Sub RaisePropertyChanged()
                RaiseEvent PropertyChanged(Me, New
                        PropertyChangedEventArgs("Data"))
        End Sub
End Class

using System.ComponentModel;

public class BarcodeData : INotifyPropertyChanged
{
        public BarcodeData()
        {
                Data = string.Empty;
        }
        private string barcodeData;
        public string Data
        {
                get
                {
                        return barcodeData;
                }
                set
                {
                        barcodeData = value;
                        RaisePropertyChanged();
                }
        }
        public event PropertyChangedEventHandler PropertyChanged;
        private void RaisePropertyChanged()
        {
                if (PropertyChanged != null)
                {
                        PropertyChanged(this,
                        new PropertyChangedEventArgs("Data"));
                }
        }
}

Dim barcodeData As New BarcodeData
Barcode.DataContext = barcodeData

var barcodeData = new BarcodeData();
Barcode.DataContext = barcodeData;

<ig:XamCode128Barcode x:Name="Barcode" Data="{Binding Data}" />

barcodeData.Data = "324654"

barcodeData.Data = "324654";