笔记2：WPF Command命令使用

笔记：WPFCommand命令使用:.

1、列表按钮绑定事件使用

Command="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType=ListBox}, Path=DataContext.But_click}" CommandParameter="{Binding Name,Mode=TwoWay}"
绑定按钮点击Command，找到对象的父级容器，类型指定为ListBox,触发事件为DataContext.But_click，返回父级容器数据中的Name，双向更新，Frame 作为弹窗控件用，当命令触发时向frame中添加控件改变Height达到类似于弹窗的效果

		<ListBox Name="l" Margin="30,0,30,60" ItemsSource="{Binding MyProperty}">
                <ListBox.ItemTemplate >
                    <DataTemplate >
                        <StackPanel Orientation="Vertical">
                            <StackPanel Orientation="Horizontal">
                                <Label Content="{Binding Name}" Foreground="Black"/>
                                <Button Command="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType=ListBox}, 
                                Path=DataContext.But_click}"
                                 CommandParameter="{Binding Name,Mode=TwoWay}" >点击</Button>
                            </StackPanel>
                            <StackPanel >
                                <Frame  Content="{Binding UC}" Height="{Binding Height}" Background="Yellow" ></Frame>
                            </StackPanel>
                        </StackPanel>
                    </DataTemplate>
                </ListBox.ItemTemplate>
            </ListBox>

使用方法

//1

//2

2、Command命令绑定传递指定控件对象

Xaml代码

Csharp代码

public ICommand But_click
        {
            get
            {
               return  new BaseCommand(o=> {
                   foreach (var item in ((Grid)o).Children)
                   {
                       MessageBox.Show(item.GetType().ToString());
                   }
                });
            }
        }