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閱讀導(dǎo)航：

• 一、先看效果
• 二、本文背景
• 三、代碼實(shí)現(xiàn)
• 四、文章參考
• 五、代碼下載

一、先看效果

二、本文背景

YouTube  Design com WPF 大神處習(xí)得，常用的遮罩對(duì)話框?qū)崿F(xiàn)，使用的開源 C# WPF控件庫 MaterialDesignInXAML ，本站曾有介紹：開源C# WPF控件庫《MaterialDesignInXAML》。

三、代碼實(shí)現(xiàn)

3.1 添加Nuget庫

站長使用.Net Core 3.1創(chuàng)建的WPF工程，創(chuàng)建“ScreenOverlayMessage”解決方案后，需要添加兩個(gè)Nuget庫：MaterialDesignThemes和MaterialDesignColors，上圖的效果是使用該控件庫實(shí)現(xiàn)的，非常強(qiáng)大。

3.2 工程結(jié)構(gòu)

不需要截圖，只修改了兩個(gè)文件，App.xaml添加MD控件4個(gè)樣式文件，MainWindow主窗口實(shí)現(xiàn)效果。

3.3 App.xaml引入MD控件樣式

<Application x:Class="DropDownMenu.App"             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"             xmlns:local="clr-namespace:DropDownMenu"             StartupUri="MainWindow.xaml">    <Application.Resources>        <ResourceDictionary>            <ResourceDictionary.MergedDictionaries>                <ResourceDictionary Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesignTheme.Light.xaml"/>                <ResourceDictionary Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesignTheme.Defaults.xaml"/>                <ResourceDictionary Source="pack://application:,,,/MaterialDesignColors;component/Themes/Recommended/Primary/MaterialDesignColor.Blue.xaml"/>                <ResourceDictionary Source="pack://application:,,,/MaterialDesignColors;component/Themes/Recommended/Accent/MaterialDesignColor.Indigo.xaml"/>            </ResourceDictionary.MergedDictionaries>        </ResourceDictionary>    </Application.Resources></Application>

3.4 主窗體

MainWindow.xaml，整體布局，看上圖加上下面的界面代碼，添加界面左上角logo圖標(biāo)、左側(cè)導(dǎo)航菜單等，下面即是全部代碼。

<Window x:Class="ScreenOverlayMessage.MainWindow"        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"        xmlns:local="clr-namespace:ScreenOverlayMessage"        mc:Ignorable="d"        xmlns:materialDesign="http://materialdesigninxaml.net/winfx/xaml/themes" MouseDown="Window_MouseDown"        Title="MainWindow" Height="576" Width="1024" ResizeMode="NoResize" WindowStartupLocation="CenterScreen" WindowStyle="None" Background="#FF423A3A">    <Grid>        <materialDesign:DialogHost BorderBrush="{DynamicResource MaterialDesignDivider}">            <materialDesign:DialogHost.DialogContent>                <Grid Width="300" Height="150" HorizontalAlignment="Center">                    <StackPanel Orientation="Horizontal" Margin="15">                        <materialDesign:PackIcon Kind="Folder" Foreground="{StaticResource PrimaryHueMidBrush}" Width="50" Height="50"/>                        <TextBlock Foreground="Gray" Width="200" Margin="15 5" TextWrapping="Wrap">                            允許應(yīng)用程序訪問您計(jì)算機(jī)上的照片、媒體和文件？                        </TextBlock>                    </StackPanel>                    <StackPanel Orientation="Horizontal" HorizontalAlignment="Right" VerticalAlignment="Bottom" Margin="15">                        <Button Command="{x:Static materialDesign:DialogHost.CloseDialogCommand}" Style="{DynamicResource MaterialDesignFlatButton}" Margin="4" VerticalAlignment="Center">                            拒絕                        </Button>                        <Button Command="{x:Static materialDesign:DialogHost.CloseDialogCommand}" Style="{DynamicResource MaterialDesignFlatButton}" Margin="4" VerticalAlignment="Center">                            允許                        </Button>                    </StackPanel>                </Grid>            </materialDesign:DialogHost.DialogContent>            <Grid>                <StackPanel Width="200" HorizontalAlignment="Left" Background="#FF472076">                    <Grid Height="150" Background="White">                        <Image Source="https://img.dotnet9.com/logo.png"/>                    </Grid>                    <Button Style="{StaticResource MaterialDesignFlatButton}" Command="{x:Static materialDesign:DialogHost.OpenDialogCommand}">                        <StackPanel Orientation="Horizontal" Height="30">                            <materialDesign:PackIcon Kind="PhotoAlbum" Width="20" Height="20" VerticalAlignment="Center"/>                            <TextBlock Text="照片" Margin="20 0" FontSize="15" VerticalAlignment="Center"/>                        </StackPanel>                    </Button>                    <Button Style="{StaticResource MaterialDesignFlatButton}" Command="{x:Static materialDesign:DialogHost.OpenDialogCommand}">                        <StackPanel Orientation="Horizontal" Height="30">                            <materialDesign:PackIcon Kind="Music" Width="20" Height="20" VerticalAlignment="Center"/>                            <TextBlock Text="音樂" Margin="20 0" FontSize="15" VerticalAlignment="Center"/>                        </StackPanel>                    </Button>                </StackPanel>            </Grid>        </materialDesign:DialogHost>    </Grid></Window>

重點(diǎn)講解：

• materialDesign:DialogHost：設(shè)置遮罩對(duì)話框覆蓋的地方，即彈出遮罩對(duì)話框后，背后有陰影的位置。
• materialDesign:DialogHost.DialogContent：對(duì)話框內(nèi)容，即彈出的對(duì)話框配置

后臺(tái)有個(gè)拖動(dòng)窗體代碼：

private void Window_MouseDown(object sender, MouseButtonEventArgs e){    DragMove();}

四、文章參考

建議直接打開大神視頻學(xué)習(xí)，他的YouTube上還有很多代碼視頻哦，參考：
參考視頻： Design com WPF： https://www.youtube.com/watch?v=Dwi9o3K73XM

五、代碼下載

文章中代碼已經(jīng)全部貼出。