使用绑定属性在 Metro 风格应用程序中打开应用程序栏 [英] opening the appbar in metro style apps using binding property

问题描述

我的主页有应用栏，它在不同的页面之间共享.我编写了以下代码以在单击 gridview 项时打开应用栏.

My main page has the appbar and it is shared across different pages. I wrote the following code to open the appbar on the click of a gridview item.

XAML

<AppBar Opened="AppBar_Opened" IsOpen="{Binding IsAppBarOpen}">

后端

private void Clock_SelectionChanged(object sender, SelectionChangedEventArgs e)
{            
    App.ViewModel.SelectedClock = (Clock)ThemeGridView.SelectedItem;
    App.WorldViewModel.IsAppBarOpen = true;                  
}

 private void ThemeGridView_ItemClick(object sender, ItemClickEventArgs e)
    {
        App.ViewModel.SelectedClock = (Clock)ThemeGridView.SelectedItem;
        App.WorldViewModel.IsAppBarOpen = true;
    } 

世界视图模型

private bool _IsAppBarOpen;

public bool IsAppBarOpen
{
   get { return _IsAppBarOpen; }
   set { base.SetProperty(ref _IsAppBarOpen, value); }
}

GridView XAML

GridView XAML

<GridView
        Grid.Row="1"
        Grid.Column="1"


         x:Name="ThemeGridView"                    
                ItemsSource="{Binding Clocks}" 
                ItemTemplate="{StaticResource WorldClockTemplate}"
                SelectionChanged="Clock_SelectionChanged"
                SelectionMode="None"
                IsItemClickEnabled="True"
                ItemClick="ThemeGridView_ItemClick"
                >
        <GridView.ItemsPanel>
            <ItemsPanelTemplate>
               <WrapGrid />
            </ItemsPanelTemplate>
        </GridView.ItemsPanel>
    </GridView>

但是当我选择 gridview 项目时应用栏没有弹出.没有绑定错误所以真的很神秘！

But the appbar is not popping up when i select the gridview item. There is no binding error so its really mysterious!

推荐答案

无法绑定 IsOpen 属性 根据msdn:

There is not way to bind IsOpen property according the msdn:

注意 绑定到 IsOpen 属性没有预期的结果因为 PropertyChanged 通知在属性已设置.

Note Binding to the IsOpen property doesn't have the expected results because the PropertyChanged notification doesn't occur when the property is set.

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