wpf 通过键与字典项绑定
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Binding with dictionary item by key
提问by Kamil
Let's say I have some dictionary and I want to bind items from this dictionary to some controls and I want to bind by item key.
假设我有一些字典，我想将这个字典中的项目绑定到一些控件，我想按项目键绑定。
public partial class Window1 : Window
{
public Window1()
{
InitializeComponent();
Dictionary<string,string> dictionary = new Dictionary<string,bool>();
dictionary.Add("Item 1", "one");
dictionary.Add("Item 2", "two");
dictionary.Add("Item 3", "three");
// ...
dictionary.Add("Item 99", "ninety nine");
// ...
this.DataContext = //...
}
}
XAML:
XAML：
<Window ... >
<Grid>
<Label Content="{Binding ...}"/><!-- "Item 1" -->
<TextBox Text="{Binding ...}"/><!-- "Item 3" -->
<StackPanel>
<CustomControl CustomProperty="{Binding ...}"/><!-- "Item 77" -->
<CustomControl2 CustomProperty="{Binding ...}"/><!-- "Item 99" -->
</StackPanel>
</Window>
Is it possible? How can I do it?
是否可以？我该怎么做？
I want to use dictionary (or something sililar).
我想使用字典（或类似的东西）。
My dictionary with variables comes from database and I have about 500 variables to bind.
我的变量字典来自数据库，我有大约 500 个变量要绑定。
These variables are not like "list of persons" or something like that. They have very diffrent meaning and I want use them as "dynamic properties".
这些变量不像“人员列表”或类似的东西。它们具有非常不同的含义，我想将它们用作“动态属性”。
I need to bind any variable with any property of any control.
我需要将任何变量与任何控件的任何属性绑定。
回答by cdmnk
<ItemsControl x:Name="dictionaryItemsControl" ItemsSource="{Binding dictionary}">
<ItemsControl.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding Key}" />
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
For that you should make 'dictionary' public property, and set this.DataContext = this;or alternatively set dictionaryItemsControl.ItemsSource = dictionary;
为此，您应该将“字典”设为公共财产，并设置this.DataContext = this;或替代设置dictionaryItemsControl.ItemsSource = dictionary;
回答by B.Balamanigandan
You can use
您可以使用
CASE #1
情况1
C# Code:
C# 代码：
public partial class MainWindow : Window
{
Dictionary<string, object> _data = new Dictionary<string, object>();
public MainWindow()
{
InitializeComponent();
Loaded += new RoutedEventHandler(MainWindow_Loaded);
}
void MainWindow_Loaded(object sender, RoutedEventArgs e)
{
_data["field1"] = 100;
_data["field2"] = "Pete Brown";
_data["field3"] = new DateTime(2010, 03, 08);
this.DataContext = new DicVM();
}
}
XAML Binding:
XAML 绑定：
<TextBlock Text="{Binding [field1], Mode=TwoWay}" />
CASE #2
案例#2
C# Code: DicViewModel.cs
C# 代码： DicViewModel.cs
class DicViewModel : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
private Dictionary<string, object> dict = new Dictionary<string, object>();
public Dictionary<string, object> Dict
{
get { return dict; }
set
{
dict = value;
if (PropertyChanged != null) PropertyChanged(this, new PropertyChangedEventArgs("Dict"));
}
}
public DicVM()
{
Dict["field1"] = 100;
Dict["field2"] = "Pete Brown";
Dict["field3"] = new DateTime(2010, 03, 08);
}
}
C# Code of Dic.xaml.cs
C# 代码 Dic.xaml.cs
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
Loaded += new RoutedEventHandler(MainWindow_Loaded);
}
void MainWindow_Loaded(object sender, RoutedEventArgs e)
{
this.DataContext = new DicViewModel();
}
}
XAML Binding:
XAML 绑定：
<TextBlock Text="{Binding Dict[field1], Mode=TwoWay}" />
