WPF+MVVM案例实战（十四）- 封装一个自定义消息弹窗控件（下）

文章目录

1、案例效果
2、弹窗空间使用
- 1.引入用户控件
- 2、按钮命令实现
3、总结
4、源代码获取

1、案例效果

在这里插入图片描述

2、弹窗空间使用

1.引入用户控件

打开 Wpf_Examples 项目，在引用中添加用户控件库，在 MainWindow.xaml 界面引用控件库，代码如下（示例）：

<Window x:Class="Wpf_Examples.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:converter="clr-namespace:Wpf_Examples.Converters"
        xmlns:local="clr-namespace:Wpf_Examples"
        xmlns:cc="clr-namespace:CustomControlLib;assembly=CustomControlLib"
        xmlns:uc="clr-namespace:UserControlLib;assembly=UserControlLib"
        DataContext="{Binding Source={StaticResource Locator},Path=Main}"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800" WindowStartupLocation="CenterScreen">
    <Grid>
        <WrapPanel>
            <Button Width="120" Height="40" FontSize="18" Content="警告弹窗" Command="{Binding ButtonClickCmd}" CommandParameter="{Binding RelativeSource={RelativeSource Mode=Self},Path=Content}" Margin="8"/>
            <Button Width="120" Height="40" FontSize="18" Content="错误弹窗" Command="{Binding ButtonClickCmd}" CommandParameter="{Binding RelativeSource={RelativeSource Mode=Self},Path=Content}" Margin="8"/>
            <Button Width="120" Height="40" FontSize="18" Content="提示弹窗" Command="{Binding ButtonClickCmd}" CommandParameter="{Binding RelativeSource={RelativeSource Mode=Self},Path=Content}" Margin="8"/>
        </WrapPanel>
    </Grid>
</Window>

这里我们引用三种状态的弹窗来做实验，用 MessageBox 分别显示每种弹窗点击按钮的结果。

2、按钮命令实现

MainViewModel.cs 中按钮命令代码实现如下：

   public class MainViewModel : ObservableObject
 {
     public RelayCommand<string> ButtonClickCmd { get; set; }
     public MainViewModel()
     {
         ButtonClickCmd = new RelayCommand<string>(FunMenu);
     }

     private void FunMenu(string obj)
     {
         var mainWindowInstance = App.Current.MainWindow; // 获取主窗口实例
         bool? result;//定义窗体点击的结果选项
         switch (obj)
         {
             case "警告弹窗":

                 var warningNotification = new UserControlLib.SMessageBox()
                 {
                     Icon = IconType.Warning,
                     ButtonType = ButtonType.OkCancel,
                     Title = "警告",
                     Content = "这是一条警告信息",
                 };
                 warningNotification.Owner = mainWindowInstance; // 设置父窗口
                 result = warningNotification.ShowDialog();
                 MessageBox.Show($"点击窗体的结果是{result}", "提示", MessageBoxButton.OK);
                 break;
             case "错误弹窗":
                 var error = new UserControlLib.SMessageBox()
                 {
                     Icon = IconType.Error,
                     ButtonType = ButtonType.Ok,
                     Title = "错误",
                     Content = "这是一条错误信息",
                 };
                 error.Owner = mainWindowInstance; // 设置父窗口
                 result = error.ShowDialog();
                 MessageBox.Show($"点击窗体的结果是{result}", "提示", MessageBoxButton.OK);
                 break;
             case "提示弹窗":
                 var info = new UserControlLib.SMessageBox()
                 {
                     Icon = IconType.Info,
                     ButtonType = ButtonType.Ok,
                     Title = "错误",
                     Content = "这是一条错误信息",
                 };
                 info.Owner = mainWindowInstance; // 设置父窗口
                 result = info.ShowDialog();
                 MessageBox.Show($"点击窗体的结果是{result}", "提示", MessageBoxButton.OK);
                 break;
         }
     }

     private void PopWindow(Window window)
     {
         var mainWindowInstance = App.Current.MainWindow; // 获取主窗口实例
         window.Owner = mainWindowInstance;
         window.WindowStartupLocation = WindowStartupLocation.CenterOwner;
         window.ShowDialog();
     }
 }