检测点击调整窗口UWP答案

【问题标题】：Detect click on resize window UWP检测点击调整窗口UWP
【发布时间】：2018-05-16 13:06:19
【问题描述】：

我想在单击调整大小按钮时启动一个消息对话框..

我在任何点击中都插入了消息对话框，但如何在调整大小窗口中启动它？

代码：

public sealed partial class MainPage : Page
{
    public MainPage()
    {
        this.InitializeComponent();
    }

    private async void Button_Click(object sender, RoutedEventArgs e)
    {
        var messageDialog = new MessageDialog("This is a Message dialog");
        await messageDialog.ShowAsync();
    }
}

我找到了一个可能的解决方案，但我只需要单击调整大小按钮，这可能吗？

代码：

Window.Current.CoreWindow.SizeChanged += (ss, ee) =>
{
      var appView = Windows.UI.ViewManagement.ApplicationView.GetForCurrentView();
      if (appView.IsFullScreen)
      {
          //show message
      }
      ee.Handled = true;
};

提前致谢！

【问题讨论】：

标签： c# uwp titlebar

【解决方案1】：

您可以为此订阅页面大小更改事件

XAML

<Page
x:Class="App.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:SO15"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d" SizeChanged="Page_SizeChanged"> <!-- SizeChanged event -->

private void Page_SizeChanged(object sender, SizeChangedEventArgs e)
{
    Window.Current.CoreWindow.SizeChanged += async (ss, ee) =>
    {
        var appView = ApplicationView.GetForCurrentView();
        if (appView.IsFullScreen)
        {
            var messageDialog = new MessageDialog("Window is Maximized");
            await messageDialog.ShowAsync();
        }
        ee.Handled = true;
    };
    Window.Current.CoreWindow.SizeChanged += async (ss, ee) =>
    {
        var appView = ApplicationView.GetForCurrentView();
        if (!appView.IsFullScreen)
        {
            var messageDialog = new MessageDialog("Window is not Maximized");
            await messageDialog.ShowAsync();

        }
        ee.Handled = true;
    };
}

建议在 c# 中交替处理

使用这个事件

Window.Current.CoreWindow.SizeChanged += CoreWindow_SizeChanged;

bool msgboxshown = false; //add this condition in above solution also if msg dialog shown multiple times at the time of mazimizing window

    private async void CoreWindow_SizeChanged(Windows.UI.Core.CoreWindow sender, Windows.UI.Core.WindowSizeChangedEventArgs args)
    {            
        var appView = ApplicationView.GetForCurrentView();

        if (!appView.IsFullScreen && !msgboxshown)
        {
            var messageDialog = new MessageDialog("Window is not maximized");
            msgboxshown = true;                
            await messageDialog.ShowAsync();
            msgboxshown = false;
        }

        if (appView.IsFullScreen && !msgboxshown)
        {
            var messageDialog = new MessageDialog("Windows is maximized");
            msgboxshown = true;                
            await messageDialog.ShowAsync();
            msgboxshown = false;

        }
        args.Handled = true;
    }

/* You can remove msgboxshown condition , it is because message dialog  will show continuously multiple times  */

【讨论】：

注意：IsFullScreen 和 IsFullScreenMode 不同，IsFullScreen 用于最大化（右上角的按钮），IsFullScreenMode 用于全屏（Windows 键 + shift + enter）。
MS 文档的链接：docs.microsoft.com/en-us/uwp/api/… 我们应该只使用 AdjacentToLeftDisplayEdge 和 AdjacentToRightDisplayEdge 来检测 SizeChanged 事件中的最大化..