wpf 如何在 XAML 中将 List 作为 ItemSource 绑定到 ListView？
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How can I bind a List as ItemSource to ListView in XAML?
提问by Jonas
I'm learning WPF and would like to have a collection similar to a LinkedList, to where I can add and remove strings. And I want to have a ListViewthat listen to that collection with databinding. How can I do bind a simple list collection to a ListViewin XAML?
我正在学习 WPF 并希望有一个类似于 LinkedList 的集合，我可以在其中添加和删除字符串。我想要一个ListView通过数据绑定来收听该集合的。如何将一个简单的列表集合绑定到ListViewXAML 中的 a？
My idea (not working) is something like this:
我的想法（不工作）是这样的：
<Window x:Class="TestApp.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">
<Window.Resources>
<LinkedList x:Key="myList"></LinkedList> //Wrong
<Window.Resources>
<Grid>
<ListView Height="100" HorizontalAlignment="Left" Margin="88,134,0,0"
Name="listView1" VerticalAlignment="Top" Width="120"
ItemsSource="{Binding Source={StaticResource myList}}"/> //Wrong
</Grid>
</Window>
All my code (updated version, not working):
我所有的代码（更新版本，不工作）：
<Window x:Class="TestApp.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>
<TextBox Height="23" HorizontalAlignment="Left" Margin="12,12,0,0"
Name="textBox1" VerticalAlignment="Top" Width="120" />
<Button Content="Button" Height="23" HorizontalAlignment="Right"
Margin="0,12,290,0" Name="button1" VerticalAlignment="Top" Width="75"
Click="button1_Click" />
<ListView Height="100" HorizontalAlignment="Left" Margin="88,134,0,0"
Name="listView1" VerticalAlignment="Top" Width="120"
ItemsSource="{Binding myList}"/>
</Grid>
</Window>
C#-code:
C#-代码：
namespace TestApp
{
public partial class MainWindow : Window
{
ObservableCollection<string> myList = new ObservableCollection<string>();
public MainWindow()
{
InitializeComponent();
myList.Add("first string");
}
private void button1_Click(object sender, RoutedEventArgs e)
{
myList.Add(textBox1.Text);
textBox1.Text = myList.Count+"st";
}
}
}
回答by ckozl
The approach selected as an answer works fine... but I don't specifically like having to specify the DataContextprogrammatically while setting everything else in XAML, I don't feel like it's "proper" (maybe this is just me). So for the next person, or anyone else who thinks like me and finds this off a search engine (like i did), here is the way to do it in XAML:
选择作为答案的方法工作正常......但我并不特别喜欢DataContext在 XAML 中设置其他所有内容时必须以编程方式指定，我不觉得它是“正确的”（也许这只是我）。因此，对于下一个人，或其他像我一样思考并从搜索引擎中找到它的人（就像我一样），这是在 XAML 中执行此操作的方法：
C#
C＃
public sealed partial class MainPage : Page
{
public ObservableCollection<string> Messages { get; set; }
public MainPage()
{
this.Messages = new ObservableCollection<string>();
this.InitializeComponent();
}
}
XAML
XAML
<Window
....
DataContext="{Binding RelativeSource={RelativeSource Self}}"
...>
<ListView ItemsSource="{Binding Messages}" ... />
</Window>
To be honest I think {Binding RelativeSource={RelativeSource Self}}should be the default value any top level element's (Page, Window, etc...) DataConextbecause it is simply how a lot of people expect it to work, I know it's how I assume it would work. Honestly, I feel like {Binding RelativeSource={RelativeSource Self}}is a bit verbose and almost long for a shorter syntax.
老实说，我认为{Binding RelativeSource={RelativeSource Self}}应该是任何顶级元素 ( Page, Window, 等...)的默认值，DataConext因为这只是很多人期望它工作的方式，我知道这是我认为它会工作的方式。老实说，我觉得{Binding RelativeSource={RelativeSource Self}}对于较短的语法来说有点冗长而且几乎很长。
回答by Wallstreet Programmer
You can only databind to public properties and you need to set the DataContext.
您只能将数据绑定到公共属性，并且需要设置 DataContext。
public partial class MainWindow : Window
{
public ObservableCollection<string> myList { get; private set; }
public MainWindow()
{
InitializeComponent();
myList = new ObservableCollection<string>();
myList.Add("first string");
DataContext = this;
}
private void button1_Click(object sender, RoutedEventArgs e)
{
myList.Add(textBox1.Text);
textBox1.Text = myList.Count + "st";
}
}
