WPF 绑定基础

Binding是Wpf的核心内容之一

1、下面是Binding基础的一个例子。

XAML：

<Grid>     <TextBox x:Name="myTextBox" Height="80" HorizontalAlignment="Left" VerticalAlignment="Top" Width="200"/>     <Button Height="23" HorizontalAlignment="Left" Margin="38,89,0,0" Name="button1" VerticalAlignment="Top" Width="75" Click="button1_Click">Button</Button> </Grid>

     C# Code

public partial class BindingTestxaml : Window   {       Customer cust;       public BindingTestxaml()       {           InitializeComponent();           BindingTest();       }       private void BindingTest()       {           //准备数据源           cust =  new Customer();          // cust.Name = "Tom";            //准备Binding           Binding bind = new Binding();           bind.Source = cust;           bind.Path = new System.Windows.PropertyPath("Name");             //使用Binding连接数据源与Binding目标           BindingOperations.SetBinding(myTextBox, TextBox.TextProperty, bind);       }         private void button1_Click(object sender, RoutedEventArgs e)       {           cust.Name += " Tom";       }   }     public class Customer:INotifyPropertyChanged   {       private string name;         public string Name       {           get { return name; }             set           {               this.name = value;               //激发事件               if (PropertyChanged != null)                   this.PropertyChanged.Invoke(this, new PropertyChangedEventArgs("Name"));             }       }         #region INotifyPropertyChanged 成员         public event PropertyChangedEventHandler PropertyChanged;         #endregion   }

 当然上面的绑定也可以变成一句话的形式：如

//使用Binding连接数据源与Binding目标  BindingOperations.SetBinding(myTextBox, TextBox.TextProperty, new Binding("Name") { Source= cust =new Customer()});

 

2、没有Source的Binding——使用DataContext作为Binding的源，下面是一个简单的例子

先创建一个名为Sutdent的类，它有三个ID，Name，Age三个属性:

public class Student   {       public string ID{ get; set;}       public string Name { get; set; }       public string Age { get; set; }   }

然后XAML创建程序UI：

<StackPanel Background="LightBlue" Margin="0,118,0,0" HorizontalAlignment="Right" Width="201" Height="122" VerticalAlignment="Top">     <StackPanel.DataContext>         <local:Student  ID="10" Name="Work Hard Work Smart" Age="30"/>     </StackPanel.DataContext>     <TextBox Height="23" HorizontalAlignment="Center" Margin="10"  Name="textBox10" VerticalAlignment="Top" Text="{Binding Path=ID}"  Width="164" />     <TextBox Height="23" HorizontalAlignment="Center" Margin="10" Name="textBox11" VerticalAlignment="Top" Text="{Binding Path=Name}"  Width="164" />     <TextBox Height="23" HorizontalAlignment="Center"  Name="textBox12" VerticalAlignment="Top" Text="{Binding Path=Age}"  Width="164" /> </StackPanel>

三个TextBox的Text通过Binding获取值，Bindng指定了Path，没有指定Source。

 

 

本文转自Work Hard Work Smart博客园博客，原文链接：http://www.cnblogs.com/linlf03/archive/2011/09/13/2175278.html，如需转载请自行联系原作者