最近在学习ItemsControl这个控件的时候，查看了MSDN上面的一个例子，并且自己做了一些修改，这里主要使用了两种方式来进行相应的数据绑定，一种是使用DataContext，另外一种是直接将一个类绑定到前台，其实这两种方式原理差不多都是将数据模型的对象添加到一个ObservableCollection集合中，然后再绑定到前台,下面分别介绍两种绑定方式：
第一种是将数据存储在一个ObservableCollection集合中，然后作为ItemsControl的DataContext对象，下面分别贴出相关的代码：
<Window x:Class="TestGrid.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:TestGrid"
Title="MainWindow" Height="" Width="">
<Grid>
<ItemsControl Margin="" x:Name="myItemsControl" ItemsSource="{Binding}">
<ItemsControl.Template>
<ControlTemplate TargetType="ItemsControl">
<Border BorderBrush="Aqua" BorderThickness="" CornerRadius="">
<ItemsPresenter/>
</Border>
</ControlTemplate>
</ItemsControl.Template>
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<WrapPanel/>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>
<DataTemplate DataType="{ x:Type local:DataSource}">
<DataTemplate.Resources>
<Style TargetType="TextBlock">
<Setter Property="FontSize" Value=""/>
<Setter Property="HorizontalAlignment" Value="Center"/>
</Style>
</DataTemplate.Resources>
<Grid>
<Rectangle Fill="Green"/>
<Ellipse Fill="Red"/>
<StackPanel>
<TextBlock Margin="3,3,3,0" Text="{Binding Path=Priority,Mode=TwoWay}"/>
<TextBlock Margin="3,0,3,7" Text="{Binding Path=TaskName,Mode=TwoWay}"/>
</StackPanel>
</Grid>
</DataTemplate>
</ItemsControl.ItemTemplate>
<ItemsControl.ItemContainerStyle>
<Style>
<Setter Property="Control.Width" Value=""/>
<Setter Property="Control.Margin" Value=""/>
<Style.Triggers>
<Trigger Property="Control.IsMouseOver" Value="True">
<Setter Property="Control.ToolTip" Value="{Binding RelativeSource={x:Static RelativeSource.Self}, Path=Content.Description}"/>
</Trigger>
</Style.Triggers>
</Style>
</ItemsControl.ItemContainerStyle>
</ItemsControl>
</Grid>
</Window>
这里需要注意的地方是 ItemsSource="{Binding}"这句必须添加，否则后台的数据是无法添加到前台的，这个需要注意，这里贴出后台的代码
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; namespace TestGrid
{
/// <summary>
/// MainWindow.xaml 的交互逻辑
/// </summary>
public partial class MainWindow : Window
{
private ObservableCollection<DataSource> item = null;
public MainWindow()
{
InitializeComponent();
item = new ObservableCollection<DataSource>();
item.Add(
new DataSource()
{
Priority = "",
TaskName = "hello"
}
);
item.Add(
new DataSource()
{
Priority = "",
TaskName = "whats"
}
);
item.Add(
new DataSource()
{
Priority = "",
TaskName = "your"
}
);
item.Add(
new DataSource()
{
Priority = "",
TaskName = "name"
}
);
item.Add(
new DataSource()
{
Priority = "",
TaskName = "can"
}
);
item.Add(
new DataSource()
{
Priority = "",
TaskName = "you"
}
);
this.myItemsControl.DataContext = item; }
}
}
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks; namespace TestGrid
{
public class DataSource : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
public DataSource()
{
} private string priority;
public string Priority
{
get
{
return priority;
}
set
{
priority = value;
OnPropertyChanged("Priority");
}
} private string taskname;
public string TaskName
{
get
{
return taskname;
}
set
{
taskname = value;
OnPropertyChanged("TaskName");
}
} protected void OnPropertyChanged(string propName)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(propName));
} } private List<DataSource> datasources; public List<DataSource> DataSources
{
get { return datasources; }
set { datasources = value; }
} }
}
这里最重要的一句就是 this.myItemsControl.DataContext = item;这个是将刚才的集合绑定到ItemsControl控件上，这里需要我们的注意。
另外一种方式的数据绑定就是将一个类绑定到这个ItemsControl控件上，具体的方式如下：
<Window x:Class="TestGrid.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:TestGrid"
Title="MainWindow" Height="" Width="">
<Window.Resources>
<local:MyData x:Key="myDataSource"/>
</Window.Resources>
<Grid>
<ItemsControl Margin="" x:Name="myItemsControl" ItemsSource="{Binding Source={StaticResource myDataSource}}">
<ItemsControl.Template>
<ControlTemplate TargetType="ItemsControl">
<Border BorderBrush="Aqua" BorderThickness="" CornerRadius="">
<ItemsPresenter/>
</Border>
</ControlTemplate>
</ItemsControl.Template>
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<WrapPanel/>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>
<DataTemplate DataType="{ x:Type local:DataSource}">
<DataTemplate.Resources>
<Style TargetType="TextBlock">
<Setter Property="FontSize" Value=""/>
<Setter Property="HorizontalAlignment" Value="Center"/>
</Style>
</DataTemplate.Resources>
<Grid>
<Rectangle Fill="Green"/>
<Ellipse Fill="Red"/>
<StackPanel>
<TextBlock Margin="3,3,3,0" Text="{Binding Path=Priority,Mode=TwoWay}"/>
<TextBlock Margin="3,0,3,7" Text="{Binding Path=TaskName,Mode=TwoWay}"/>
</StackPanel>
</Grid>
</DataTemplate>
</ItemsControl.ItemTemplate>
<ItemsControl.ItemContainerStyle>
<Style>
<Setter Property="Control.Width" Value=""/>
<Setter Property="Control.Margin" Value=""/>
<Style.Triggers>
<Trigger Property="Control.IsMouseOver" Value="True">
<Setter Property="Control.ToolTip" Value="{Binding RelativeSource={x:Static RelativeSource.Self}, Path=Content.Description}"/>
</Trigger>
</Style.Triggers>
</Style>
</ItemsControl.ItemContainerStyle>
</ItemsControl>
</Grid>
</Window>
这里我们通过资源来引用一个类，让后使用 ItemsSource="{Binding Source={StaticResource myDataSource}}"将这个类绑定到ItemsSource控件上面，这里贴出相关的代码，我们定义了一个MyData的类，将该类作为数据源绑定到前台上，这个类的代码如下
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks; namespace TestGrid
{
public class MyData:ObservableCollection<DataSource>
{
public MyData()
{
Add (new DataSource()
{
Priority = "",
TaskName = "My"
}
);
Add(new DataSource()
{
Priority = "",
TaskName = "Name"
}
);
Add(new DataSource()
{
Priority = "",
TaskName = "Is"
}
);
Add(new DataSource()
{
Priority = "",
TaskName = "Ye"
}
);
Add(new DataSource()
{
Priority = "",
TaskName = "Bo"
}
); } }
}
这里面很重要的一部就是让这个类继承自 ObservableCollection<DataSource>，然后来添加相应的数据源，我们在使用继承的时候需要注意这些技巧。
其实这两种情况都是将一个数据集合绑定到前台，只不过是一些绑定的方式有所不同，实际的原理都是一样的！