private void CreateAssociationButton_Click(object sender, EventArgs e)
{SavePanelStateAndClose();if (propertyList.SelectedIndex >= 0 && bindingTypes.SelectedIndex >= 0){BaseBindingPanelFactory factory = (BaseBindingPanelFactory)bindingTypes.SelectedItem; // factory在这里执行过后，就是NumericBindingPanel.cs里定义的NumericBindingPanelFactory类型了bindingPanel = factory.CreateInstance(); // bindingPanel的具体类型是NumericBindingPanel还是StringBindingPanel，在这里得到了重新定义（不再是基类的BaseBindingPanel类型了）bindingPanel.Initialize(element, propertyList.SelectedItem as PropertyWrapper, null);bindingPanel.Parent = panel1;bindingPanel.Dock = DockStyle.Fill;CreateAssociationButton.Enabled = false;bindingTypes.Enabled = false;}
}

private void saveButton_Click(object sender, EventArgs e)
{SavePanelStateAndClose();if (activeBindings.Count > 0){foreach (PropertyWrapper key in activeBindings.Keys){DependencyObject depObj;DependencyProperty depProp;System.Windows.Data.BindingBase binding = activeBindings[key];if (key.GetWpfObjects(out depObj, out depProp) && binding != null)BindingOperations.SetBinding(depObj, depProp, binding);}}DialogResult = DialogResult.OK;Close();
}

private void SavePanelStateAndClose()
{if (bindingPanel != null){BindingBase binding = bindingPanel.Save(); // 见NumericBindingPanel类的Save()定义if (binding != null)activeBindings[bindingPanel.Property] = binding; // activeBindings为Dictionary<PropertyWrapper, BindingBase>，bindingPanel.Property为PropertyWrapperbindingPanel.Dispose();bindingPanel = null;}
}

public override System.Windows.Data.BindingBase Save()
{if (channel != null){System.Windows.Data.Binding bind = new System.Windows.Data.Binding("Value");ChannelDataProvider cdp = new ChannelDataProvider();cdp.ChannelName = channel.PluginId + "." + channel.Name;bind.Source = cdp; // 绑定的源数据为通道数据bind.UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged;cdp.Refresh();ComposingConverter conv = new ComposingConverter();if (checkBox1.Checked){RangeConverter rc = new RangeConverter();rc.Min = Decimal.ToDouble(minEdit.Value);rc.Max = Decimal.ToDouble(maxEdit.Value);conv.Converters.Add(rc);}conv.Converters.Add(new Kent.Boogaart.Converters.TypeConverter(cdp.Channel.Type, Property.PropertyType));bind.Converter = conv;bind.Mode = BindingMode.TwoWay;DependencyObject depObj;DependencyProperty depProp;if (Property.GetWpfObjects(out depObj, out depProp))bind.FallbackValue = depObj.GetValue(depProp);return bind;}else return base.Save();
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;using System.Threading;
using System.ComponentModel;namespace WpfApplication1
{/// <summary>/// Interaction logic for MainWindow.xaml/// </summary>public partial class MainWindow : Window{public class DataSource : INotifyPropertyChanged{private int _index;public int Index{get { return _index; }set{_index = value;if (PropertyChanged != null){this.PropertyChanged.Invoke(this, new PropertyChangedEventArgs("Index"));}}}public event PropertyChangedEventHandler PropertyChanged;} System.Windows.Data.Binding _bind;Thread _thread;DataSource _dataSource;bool _run;public MainWindow(){InitializeComponent();_dataSource = new DataSource();// System.Windows.Data.Binding方式_bind = new System.Windows.Data.Binding();_bind.Source = _dataSource;_bind.Path = new PropertyPath("Index");_bind.UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged;this.textBox1.SetBinding(TextBox.TextProperty, _bind);_run = true;_thread = new Thread(Test);_thread.Start();}void Test(){while (_run) // 里面不能放阻塞式的方法，否则逻辑可能一直卡住{_dataSource.Index++;Thread.Sleep(100);}}private void Window_Closing(object sender, CancelEventArgs e){_run = false;if (_thread != null){_thread.Join();_thread = null;}}}
}