WPF开发01-数据绑定的几种方式，静态，动态、向上查找、适应各种情况

1.前后端简单绑定
第一种比较常见，常见于mvvm框架
前端

<TextBlock Text="{Binding Path=Name}"></TextBlock>
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后端

public class PersonViewModel : INotifyPropertyChanged
{
public string Name
{
get { return name; }
set
{
if (name != value)
{
person.Name = value;
OnPropertyChanged("Name");
}
}
}
private string name;

public event PropertyChangedEventHandler PropertyChanged;

protected virtual void OnPropertyChanged(string propertyName)
{
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
}
}
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有一个比较重要的点就是，继承INotifyPropertyChanged，并实现OnPropertyChanged

2.converter转换绑定
从业wpf一段时间之后发现，特别是自学wpf的人，会漏掉这个技术点，这里补充一下。
前端

<Cvts:NameToUper x:Key="NameToUper"/>
<TextBlock Text="{Binding Path=Name, Converter={StaticResource NameToUper}}"></TextBlock>
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后端

public class PersonViewModel : INotifyPropertyChanged
{
public string Name
{
get { return name; }
set
{
if (name != value)
{
person.Name = value;
OnPropertyChanged("Name");
}
}
}
private string name;

public event PropertyChangedEventHandler PropertyChanged;

protected virtual void OnPropertyChanged(string propertyName)
{
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
}
}
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NameToUper转换器代码

public class NameToUper:IValueConverter
{

public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
return value.ToString().ToUper();
}

public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
return null;
}
}
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3.FindAncestor绑定
下面这个例子是实现菜单选中的样式，两层的listview做两级菜单

<ListView x:Name="listView" ItemsSource="{Binding list}" BorderThickness="0" SelectionMode="Single">
<ListView.ItemTemplate>
<DataTemplate>
<Border>
<StackPanel>
<TextBox Text="{Binding Content}"/>
<ListView Margin="10 0 0 0" ItemsSource="{Binding SubQuesInfos}" SelectionMode="Extended"
Visibility="{Binding IsSelected, Converter={StaticResource ItemsPanelStyleCvt},
Mode=OneWay, RelativeSource={RelativeSource FindAncestor, AncestorType=ListBoxItem}}">
<ListView.ItemTemplate>
<DataTemplate>
<Border>
<StackPanel>
<TextBlock Text="{Binding Content}"/>
</StackPanel>
</Border>
</DataTemplate>
</ListView.ItemTemplate>
<ListView.Style>
<Style TargetType="{x:Type ListView}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate>
<Border x:Name="Bd" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Padding="1" SnapsToDevicePixels="true">
<StackPanel Focusable="false">
<ItemsPresenter SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
</StackPanel>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</ListView.Style>
</ListView>
</StackPanel>
</Border>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
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4.x:Reference 绑定
开发的时候会意见一些比较特殊的情况，内嵌的控件要绑定ViewModel的数据。用直接的绑定时不行的，要用代理

{Binding Path=DisplayColumnIsChanged,Source={x:Reference Name=model},Converter={StaticResource DetailVisibleConverter}
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5.静态绑定
很多固化的信息，不需要写在viewmodel里面，直接写在静态类就可以

Content="{Binding Path=MESState, Source={x:Static Station:Station.Current},Converter={StaticResource BoolToVisibleCvt}}"
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还有的时候，Datacontext也不一定要这么写

<Window.DataContext>
<model:SimpleModel/>
</Window.DataContext>
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也可以这么写，静态绑定，也方便其它地方调用

<Window.DataContext>
<Binding Source="{x:Static Station:Station.Current}"></Binding>
</Window.DataContext>
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或者

DataContext="{Binding Source={x:Static vm:MainWindowViewModel.Instance}}"
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原文链接：https://blog.csdn.net/magicchz/article/details/129117200