C# 数据绑定
1.用于通知的类
///
/// 属性修改通知基类，用于实现数据绑定功能
///
public class PropertyChangedBase : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
public void NotifyPropertyChanged([CallerMemberName] String propertyName = "")
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
}
}
}
2.数据层
public class TestBindingData : PropertyChangedBase
{
public static TestBindingData Instance
{
get
{
if (null == m_Instance)
m_Instance = new TestBindingData();
return m_Instance;
}
}
public string BindingData
{
get { return m_TestBindingData; }
set
{
m_TestBindingData = value;
NotifyPropertyChanged();
}
}
private string m_TestBindingData = string.Empty;
private static volatile TestBindingData m_Instance = new TestBindingData();
private static object m_SyncObj = new object();
}
3.用于绑定的部分代码：
Binding binding = new Binding();
binding.Mode = BindingMode.TwoWay;
binding.NotifyOnTargetUpdated = true;
binding.BindsDirectlyToSource = true;
binding.Path = new PropertyPath("BindingData");
binding.Source = TestBindingData.Instance;
binding.UpdateSourceTrigger =
UpdateSourceTrigger.PropertyChanged;
DependencyProperty dependProperty = TextBox.TextProperty;
BindingOperations.SetBinding(TestBindingTextBox, dependProperty, binding);
注：标红的属性表示，当UI层的文本框数据改变时，马上通知数据层，触发数据层的Set属性。