C# wpf 实现简单自定义MessageBox

<Window x:Class="WpfApp1.MessageBox"        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:WpfApp1"        mc:Ignorable="d"        Title="MessageBox"         AllowsTransparency="True"        Background="Transparent"        ResizeMode="NoResize"        ShowInTaskbar="False"        Topmost="True"        WindowStartupLocation="CenterScreen"        Width="600"        Height="260"        WindowStyle="None"        Closing="Window_Closing"        >    <Viewbox>        <Grid  Width="600" Height="260">            <Border  Margin="10" Background="White"    >                <Border.Effect>                    <DropShadowEffect ShadowDepth="0" BlurRadius="10" Opacity="0.5"/>                </Border.Effect>                <Grid Margin="20">                    <TextBlock x:Name="TB_Context" Margin="0,0,0,40" Text="Ensure?"  HorizontalAlignment="Center"  VerticalAlignment="Center" FontSize="48"  Foreground="Gray"/>                    <Button VerticalAlignment="Bottom"   Content="No"  Tag="No"  Margin="-174,0,0,0" Height="64" Width="144"  Click="No_Button_Click"  Cursor="Hand" >                        <Button.Template>                            <ControlTemplate  TargetType="{x:Type Button}">                                <Border Name="Border" Background="White"  BorderBrush="#cccccc"  >                                    <Border.Effect>                                        <DropShadowEffect ShadowDepth="0" BlurRadius="10" Opacity="0.2"/>                                    </Border.Effect>                                    <TextBlock   Text="{TemplateBinding Content}"  FontSize="24"    Foreground="Gray"  HorizontalAlignment="Center" VerticalAlignment="Center">                                    </TextBlock>                                </Border>                            </ControlTemplate>                        </Button.Template>                    </Button>                    <Button VerticalAlignment="Bottom"    Content="Yes"  Tag="Yes"   Margin="174,0,0,0" Height="64" Width="144"  Click="Yes_Button_Click" Cursor="Hand">                        <Button.Template>                            <ControlTemplate  TargetType="{x:Type Button}">                                <Border Name="Border" Background="Gray"  >                                    <Border.Effect>                                        <DropShadowEffect ShadowDepth="0" BlurRadius="10" Opacity="0.2"/>                                    </Border.Effect>                                    <TextBlock  Text="{TemplateBinding Content}"  FontSize="24"    Foreground="White"  HorizontalAlignment="Center" VerticalAlignment="Center">                                    </TextBlock>                                </Border>                            </ControlTemplate>                        </Button.Template>                    </Button>                </Grid>            </Border>        </Grid>    </Viewbox></Window>

using System;using System.Windows;namespace WpfApp1{    public class MessageResult    {        /// <summary>        /// 结果，Yes为true，No为false        /// </summary>        public bool IsYes { get; set; }    }    public class MessageBoxEventArgs : EventArgs    {        /// <summary>        /// 结果，Yes为true，No为false        /// </summary>        public MessageResult Result { get; set; }    }    /// <summary>    /// MessageBox.xaml 的交互逻辑    /// </summary>    public partial class MessageBox : Window    {        public  event EventHandler<MessageBoxEventArgs> Result;                public string Context        {            get { return TB_Context.Text; }            set { TB_Context.Text = value; }        }        bool _isLegal = false;        public MessageBox()        {            InitializeComponent();                }        public static void Show(string context, EventHandler<MessageBoxEventArgs> result)        {            var mb = new MessageBox();            mb.Context = context;            mb.Result += result;            mb.Show();        }        public static MessageResult ShowDialog(string context)        {            var mb = new MessageBox();            mb.Context = context;            MessageResult r=null;            mb.Result += (s,e)=> {                r = e.Result;            };            mb.ShowDialog();            return r;        }        private void No_Button_Click(object sender, RoutedEventArgs e)        {            _isLegal = true;            Close();            Result?.Invoke(this, new MessageBoxEventArgs() { Result = new MessageResult() { IsYes=false } });        }        private void Yes_Button_Click(object sender, RoutedEventArgs e)        {            _isLegal = true;            Close();            Result?.Invoke(this, new MessageBoxEventArgs() { Result = new MessageResult() { IsYes = true} });        }        private void Window_Closing(object sender, System.ComponentModel.CancelEventArgs e)        {            e.Cancel = !_isLegal;        }    }}

 MessageBox.Show("Ensure?", (s, e) => {     if (e.Result.IsYes)     {         //选择了Yes     }     else     {         //选择了No     } });

var r = MessageBox.ShowDialog("Ensure?");if (r.IsYes){    //选择了Yes}else{    //选择了No}