WPF MVVM Binding Example

Base.cs

class Base : INotifyPropertyChanged
{

    public event PropertyChangedEventHandler PropertyChanged;
    protected virtual void OnPropertyChanged(string propertyName)
    {
        this.VerifyPropertyName(propertyName);
        PropertyChangedEventHandler handler = this.PropertyChanged;
        if (handler != null)
        {
            var e = new PropertyChangedEventArgs(propertyName);
            handler(this, e);
        }
    }

    public void VerifyPropertyName(string propertyName)
    {
        if (TypeDescriptor.GetProperties(this)[propertyName] == null)
        {
            string msg = "Invalid property name: " + propertyName;
            throw new Exception(msg);
        }
    }
}

Main.cs

class Main: Base
{
    private string textfield = "Initial Value";
    public string Textfield
    {
        get { 
            return textfield; 
        }
        set { 
            textfield = value;
            OnPropertyChanged("Textfield");
        }
    }

    public void DoSomething()
    {

    }
}

MainWindow.xaml

<DockPanel LastChildFill="True">
  <StackPanel DockPanel.Dock="Top" Height="50">
  </StackPanel>
  <StackPanel DockPanel.Dock="Bottom" Orientation="Horizontal">
      <TextBox 
          Text="{Binding Path=Textfield, Mode=TwoWay}" 
          Width="200"
      ></TextBox>
      <Button 
          Name="DoSomething" 
          Click="DoSomething_Click_1" 
          Content="Do Work" 
          Width="100" 
          HorizontalAlignment="Right" 
          Margin="20"
      ></Button>
  </StackPanel>
  <StackPanel>
  </StackPanel>
</DockPanel>

MainWindow.xaml.cs

/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
    private viewmodel.Main vm;
    public MainWindow()
    {
        InitializeComponent();
        this.vm = new viewmodel.Main();
        this.DataContext = vm;
    }

    private void DoSomething_Click_1(object sender, RoutedEventArgs e)
    {
        vm.DoSomething();
    }
    
}