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原文： http://www.cnblogs.com/pasoraku/archive/2012/10/25/2738428.htmlWPF的Binding学习笔记(二)
上次学了点点Binding的皮毛, 然后就做别的事去了, 等回头再来看WPF的时候, 哈忘记了~
于是写个例子补一下, 在继续学习Binding.
1, 首先准备好一个类
public class Hero
{
public Hero(int id, string name, string skill, bool hasM)
{
this.Name = name;
this.Id = id;
this.Skill = skill;
this.HasM = hasM; }
public int Id { get; set; }
public string Name { get; set; }
public string Skill { get; set; }
public bool HasM { get; set; }
}
2, 在MainWindow中准备好数据
Dictionary<string, Hero> map = new Dictionary<string, Hero>();
private void InitDictionary()
{
Hero hero1 = new Hero(1, "刘备", "哭泣", true);
map.Add(hero1.Name, hero1);
Hero hero2 = new Hero(2, "官羽", "贪污", false);
map.Add(hero2.Name, hero2);
Hero hero3 = new Hero(3, "黄忠", "射击", true);
map.Add(hero3.Name, hero3);
Hero hero4 = new Hero(4, "魏延", "突击", true);
map.Add(hero4.Name, hero4);
Hero hero5 = new Hero(5, "马超", "单挑", false);
map.Add(hero5.Name, hero5);
Hero hero6 = new Hero(6, "曹仁", "防守", true);
map.Add(hero6.Name, hero6);
}
然后XAML这边是这样的
1, 先准备好template
<Window.Resources>
<DataTemplate x:Key="nameDT">
<TextBlock x:Name="textBoxName" Text="{Binding Name}" />
</DataTemplate>
<DataTemplate x:Key="skillDT">
<TextBlock x:Name="textBoxSkill" Text="{Binding Skill}" />
</DataTemplate>
<DataTemplate x:Key="hmDT">
<CheckBox x:Name="checkBoxJob" IsChecked="{Binding HasM}" />
</DataTemplate>
</Window.Resources>
2, 界面
<Grid Margin="5" >
<ListView x:Name="listViewStudent">
<ListView.View>
<GridView>
<GridViewColumn Header="ID" DisplayMemberBinding="{Binding Id}" />
<GridViewColumn Header="姓名" CellTemplate="{StaticResource nameDT}" />
<GridViewColumn Header="技术" CellTemplate="{StaticResource skillDT}" />
<GridViewColumn Header="已婚" CellTemplate="{StaticResource hmDT}" />
</GridView>
</ListView.View>
</ListView>
</Grid>
3, 就是上一篇笔记中记载的Binding方法了
public Window1()
{
InitializeComponent();
InitDictionary();
Binding binding = new Binding();
binding.Source = map;
binding.Path = new PropertyPath("Values");
listViewStudent.SetBinding(ListView.ItemsSourceProperty, binding);
}
好了, 运行!一切OK~
界面出来啦
等等! 好像和上次有点不太一样, 少了一步吧? 数据源没有实现INotifyPropertyChanged接口呢.
先不急, 测试下:
1, 加个button吧, XAML处的界面显示相关代码修改如下
<Grid Margin="5" >
<Grid.RowDefinitions>
<RowDefinition Height="3*" />
<RowDefinition Height="1*"/>
</Grid.RowDefinitions>
<ListView x:Name="listViewStudent">
<ListView.View>
<GridView>
<GridViewColumn Header="ID" DisplayMemberBinding="{Binding Id}" />
<GridViewColumn Header="姓名" CellTemplate="{StaticResource nameDT}" />
<GridViewColumn Header="技术" CellTemplate="{StaticResource skillDT}" />
<GridViewColumn Header="已婚" CellTemplate="{StaticResource hjM}" />
</GridView>
</ListView.View>
</ListView>
<Button Grid.Row="1" Content="给官老爷正名!" Click="Button_Click" />
</Grid>
2, 填函数
private void Button_Click(object sender, RoutedEventArgs e)
{
map["官羽"].Name = "关羽";
map["官羽"].Skill = "单挑";
}
F5运行, 点击按钮, 发现没有得到预期的改变, 表格显示的数据动也不动. 好吧, 看来的确没有Binding, 只是单次的赋值而已, 没有"数据驱动"呀!
那么来补上准备数据源这一步
修改后的Hero类代码如下, 为了便于比较, 实现了Skill, 而不实现Name等其他属性.
public class Hero : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;//请注意
public Hero(int id, string name, string skill, bool hasJob)
{
this.Name = name;
this.Id = id;
this.Skill = skill;
this.HasM = hasM;
}
public int Id { get; set; }
public string Name { get; set; } public bool HasM { get; set; }
private string skill;
public string Skill
{
get
{
return skill;
}
set
{
skill = value;
//触发事件//请注意
if (PropertyChanged != null)
{
PropertyChanged.Invoke(this, new PropertyChangedEventArgs("Skill"));
}
}
}
}
好了, F5运行, 效果如下
嗯, 效果实现, Skill的确是变了, Name没变.
Binding学习笔记一的复习到此结束, 可以看新内容了~
啊! ! 刚才的Binding有点意思呢, 我不那么写Binding, 而是改成
public Window1()
{
InitializeComponent();
InitDictionary();
// Binding binding = new Binding();
// binding.Source = map;
// binding.Path = new PropertyPath("Values");
// listViewStudent.SetBinding(ListView.ItemsSourceProperty, binding); listViewStudent.ItemsSource=map.Values; }
效果竟然一样! ! ! 这个可比textBox.Text的赋值智能多了呀...
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原文地址：http://www.cnblogs.com/qixue/p/5023236.html
