WPF,C# 数据绑定

微软参考：

数据绑定概述：https://msdn.microsoft.com/zh-cn/library/ms752347(v=vs.110).aspx

数据绑定概述(XAML)： https://msdn.microsoft.com/zh-cn/library/windows/apps/xaml/hh758320.aspx

绑定源概述： https://msdn.microsoft.com/zh-cn/library/ms743643(v=vs.110).aspx

绑定声明概述： https://msdn.microsoft.com/zh-cn/library/ms752300(v=vs.110).aspx

如何：指定绑定源： https://msdn.microsoft.com/zh-cn/library/ms746695(v=vs.110).aspx

FrameworkElement.DataContext 属性： 

     https://msdn.microsoft.com/zh-cn/library/system.windows.frameworkelement.datacontext(v=vs.110).aspx

示例：

界面：

<Window x:Class="BindingData.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525">

    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="138*" />
            <RowDefinition Height="173*" />
        </Grid.RowDefinitions>
        <StackPanel Grid.RowSpan="2">
            <TextBox x:Name="textBox1" Margin="5" Text="{Binding Path=Age}"/>
            <Button  Content="Pass A Year" x:Name="button1" Click="button1_Click" Margin="5"  Height="25" Width="190" />
        </StackPanel>

        <StackPanel Grid.Row="1">
            <ListBox x:Name="listboxColor" Height="55" Width="461">
                <ListBoxItem>Yellow</ListBoxItem>
                <ListBoxItem>Blue</ListBoxItem>
                <ListBoxItem>Red</ListBoxItem>
                <ListBoxItem>Black</ListBoxItem>
            </ListBox>
            <TextBlock x:Name="textBlockShowColor" Height="35" Margin="0"  
                       Text="{Binding ElementName = listboxColor,Path = SelectedItem.Content}"                    
                       Background="{Binding ElementName = listboxColor,Path = SelectedItem.Content}" Width="400" />
        </StackPanel>

    </Grid>
</Window>

CS代码：

using System.Windows;
using System.Windows.Data;
using System.Windows.Controls;
using System.ComponentModel;


namespace BindingData
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        public Person per;  

        public MainWindow()
        {
            InitializeComponent();

            //数据源  
            per = new Person();  

            //xaml中绑定 设置数据源    
            this.DataContext = per;

            //cs代码中绑定，xaml中不需 Binding
#if true
            //写法1
            //Binding myBinding = new Binding();  
            //myBinding.Source = per;  
            //myBinding.Path = new PropertyPath("Age");  
#elif false
            //写法2
            Binding myBinding = new Binding(){Path= new PropertyPath("Age"),Source = per);  
#else
            //写法3
            Binding myBinding = new Binding("Age"){Source = per}; 
#endif

            //使用bingding对象 绑定 绑定源 和绑定目标 ，将Textbox绑定到per上  
            //BindingOperations.SetBinding(this.textBox1, TextBox.TextProperty, myBinding);  
            //this.textBox1.SetBinding(TextBox.TextProperty,myBinding);   //也可以这样建立绑定  

            ////////////////////////////////////////////////////////////////////////////////////

            Binding myBinding2 = new Binding();     //创建新的绑定对象  
            myBinding2.Source = this.listboxColor;  //绑定源  
            myBinding2.Path = new PropertyPath("SelectedItem.Content");  //绑定源路径  
            //将绑定源与绑定目标绑定起来 这是是与绑定目标textBlockShowColor的TextProperty绑定  
            BindingOperations.SetBinding(this.textBlockShowColor, TextBlock.TextProperty, myBinding2);

            Binding myBindingbcGround = new Binding();
            myBindingbcGround.Source = this.listboxColor;
            myBindingbcGround.Path = new PropertyPath("SelectedItem.Content");
            BindingOperations.SetBinding(this.textBlockShowColor, TextBlock.BackgroundProperty, myBindingbcGround);  
        }

        private void button1_Click(object sender, RoutedEventArgs e)
        {
            per.Age++;
        }  
    }

    public class Person : INotifyPropertyChanged
    {
        public event PropertyChangedEventHandler PropertyChanged;

        private int age;
        public int Age
        {
            get
            {
                return age;
            }
            set
            {
                age = value;
                if (this.PropertyChanged != null)//激发事件，参数为Age属性  
                {
                    this.PropertyChanged.Invoke(this, new PropertyChangedEventArgs("Age"));
                }
            }

        }
    }  
}