WPF 实现带蒙版的 MessageBox 消息提示框

作者：WPFDevelopersOrg

原文链接： https://github.com/WPFDevelopersOrg/WPFDevelopers.Minimal

• 框架使用大于等于.NET40；
• Visual Studio 2022;
• 项目使用 MIT 开源许可协议；
• Nuget Install-Package WPFDevelopers.Minimal 3.2.6-preview

MessageBox

• 实现MessageBox的Show五种方法；Show(string messageBoxText) 传入Msg参数；Show(string messageBoxText, string caption) 传入Msg与标题参数；Show(string messageBoxText, string caption, MessageBoxButton button) 传入Msg与标题、操作按钮参数；Show(string messageBoxText, string caption, MessageBoxImage icon) 传入Msg与标题、消息图片参数；Show(string messageBoxText, string caption, MessageBoxButton button, MessageBoxImage icon) 传入Msg与标题、操作按钮、消息图片参数；
• 拿到父级Window窗体的内容Content,放入一个Grid里,再在容器里放入一个半透明的Grid，最后将整个Grid赋给父级Window窗体的内容Content；

一、MessageBox.cs 代码如下；

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Windows;using System.Windows.Controls;using System.Windows.Media;namespace WPFDevelopers.Minimal.Controls{    public static class MessageBox    {        public static MessageBoxResult Show(string messageBoxText)        {            var msg = new WPFMessageBox(messageBoxText);            return GetWindow(msg);        }        public static MessageBoxResult Show(string messageBoxText, string caption)        {            var msg = new WPFMessageBox(messageBoxText, caption);            return GetWindow(msg);        }        public static MessageBoxResult Show(string messageBoxText, string caption, MessageBoxButton button)        {            var msg = new WPFMessageBox(messageBoxText, caption, button);            return GetWindow(msg);        }        public static MessageBoxResult Show(string messageBoxText, string caption, MessageBoxImage icon)        {            var msg = new WPFMessageBox(messageBoxText, caption, icon);            return GetWindow(msg);        }        public static MessageBoxResult Show(string messageBoxText, string caption, MessageBoxButton button, MessageBoxImage icon)        {            var msg = new WPFMessageBox(messageBoxText, caption,button,icon);            return GetWindow(msg);        }        static MessageBoxResult GetWindow(WPFMessageBox msg)        {            msg.WindowStartupLocation = WindowStartupLocation.CenterOwner;            Window win = null;            if (Application.Current.Windows.Count > 0)                win = Application.Current.Windows.OfType().FirstOrDefault(o => o.IsActive);            if (win != null)            {                var layer = new Grid() { Background = new SolidColorBrush(Color.FromArgb(128, 0, 0, 0)) };                UIElement original = win.Content as UIElement;                win.Content = null;                var container = new Grid();                container.Children.Add(original);                container.Children.Add(layer);                win.Content = container;                msg.Owner = win;                msg.ShowDialog();                container.Children.Clear();                win.Content = original;            }            else                msg.Show();            return msg.Result;        }    }}

二、Styles.MessageBox.xaml 代码如下；

三、WPFMessageBox.cs 代码如下；

using System;using System.Collections.Generic;using System.ComponentModel;using System.Text;using System.Windows;using System.Windows.Controls;using System.Windows.Media;using System.Windows.Shapes;namespace WPFDevelopers.Minimal.Controls{    [TemplatePart(Name = TitleTemplateName, Type = typeof(TextBlock))]    [TemplatePart(Name = CloseButtonTemplateName, Type = typeof(Button))]    [TemplatePart(Name = MessageTemplateName, Type = typeof(TextBlock))]    [TemplatePart(Name = ButtonCancelTemplateName, Type = typeof(Button))]    [TemplatePart(Name = ButtonCancelTemplateName, Type = typeof(Button))]    [TemplatePart(Name = PathTemplateName, Type = typeof(Path))]    public sealed class WPFMessageBox : Window    {        private const string TitleTemplateName = "PART_Title";        private const string CloseButtonTemplateName = "PART_CloseButton";        private const string MessageTemplateName = "PART_Message";        private const string ButtonCancelTemplateName = "PART_ButtonCancel";        private const string ButtonOKTemplateName = "PART_ButtonOK";        private const string PathTemplateName = "PART_Path";        private string _messageString;        private string _titleString;        private Geometry _geometry;        private SolidColorBrush _solidColorBrush;        private Visibility _cancelVisibility = Visibility.Collapsed;        private Visibility _okVisibility;        private TextBlock _title;        private TextBlock _message;        private Button _closeButton;        private Button _buttonCancel;        private Button _buttonOK;        private Path _path;        static WPFMessageBox()        {            DefaultStyleKeyProperty.OverrideMetadata(typeof(WPFMessageBox), new FrameworkPropertyMetadata(typeof(WPFMessageBox)));        }        public override void OnApplyTemplate()        {            base.OnApplyTemplate();            _title = GetTemplateChild(TitleTemplateName) as TextBlock;            _message = GetTemplateChild(MessageTemplateName) as TextBlock;            if (_title == null || _message == null)                throw new InvalidOperationException("the title or message control is null!");            _title.Text = _titleString;            _message.Text = _messageString;            _path = GetTemplateChild(PathTemplateName) as Path;            if (_path != null)            {                _path.Data = _geometry;                _path.Fill = _solidColorBrush;            }            _closeButton = GetTemplateChild(CloseButtonTemplateName) as Button;            if (_closeButton != null)                _closeButton.Click += _closeButton_Click;            _buttonCancel = GetTemplateChild(ButtonCancelTemplateName) as Button;            if (_buttonCancel != null)            {                _buttonCancel.Visibility = _cancelVisibility;                _buttonCancel.Click += _buttonCancel_Click;            }            _buttonOK = GetTemplateChild(ButtonOKTemplateName) as Button;            if (_buttonOK != null)            {                _buttonOK.Visibility = _okVisibility;                _buttonOK.Click += _buttonOK_Click;            }            if (Owner == null)            {                BorderThickness = new Thickness(1);                WindowStartupLocation = WindowStartupLocation.CenterScreen;            }        }        private void _buttonOK_Click(object sender, RoutedEventArgs e)        {            Result = MessageBoxResult.OK;            Close();        }        private void _buttonCancel_Click(object sender, RoutedEventArgs e)        {            Result = MessageBoxResult.Cancel;            Close();        }        private void _closeButton_Click(object sender, RoutedEventArgs e)        {            Close();        }        protected override void OnClosed(EventArgs e)        {            base.OnClosed(e);            if (Owner == null)                return;            var grid = Owner.Content as Grid;            UIElement original = VisualTreeHelper.GetChild(grid, 0) as UIElement;            grid.Children.Remove(original);            Owner.Content = original;        }        public MessageBoxResult Result { get; set; }        public WPFMessageBox(string message)        {                        _messageString = message;        }        public WPFMessageBox(string message, string caption)        {            _titleString = caption;            _messageString = message;                   }        public WPFMessageBox(string message, string caption, MessageBoxButton button)        {            _titleString = caption;            _messageString = message; ;        }        public WPFMessageBox(string message, string caption, MessageBoxImage image)        {            _titleString = caption;            _messageString = message;            DisplayImage(image);        }        public WPFMessageBox(string message, string caption, MessageBoxButton button, MessageBoxImage image)        {            _titleString = caption;            _messageString = message;            DisplayImage(image);            DisplayButtons(button);        }        private void DisplayButtons(MessageBoxButton button)        {            switch (button)            {                case MessageBoxButton.OKCancel:                case MessageBoxButton.YesNo:                    _cancelVisibility = Visibility.Visible;                    _okVisibility = Visibility.Visible;                    break;                //case MessageBoxButton.YesNoCancel:                //    break;                default:                    _okVisibility = Visibility.Visible;                    break;            }        }        private void DisplayImage(MessageBoxImage image)        {            switch (image)            {                case MessageBoxImage.Warning:                    _geometry = Application.Current.Resources["PathWarning"] as Geometry;                    _solidColorBrush = Application.Current.Resources["WarningSolidColorBrush"] as SolidColorBrush;                    break;                case MessageBoxImage.Error:                    _geometry = Application.Current.Resources["PathError"] as Geometry;                    _solidColorBrush = Application.Current.Resources["DangerSolidColorBrush"] as SolidColorBrush;                    break;                case MessageBoxImage.Information:                    _geometry = Application.Current.Resources["PathWarning"] as Geometry;                    _solidColorBrush = Application.Current.Resources["SuccessSolidColorBrush"] as SolidColorBrush;                    break;                case MessageBoxImage.Question:                    _geometry = Application.Current.Resources["PathQuestion"] as Geometry;                    _solidColorBrush = Application.Current.Resources["PrimaryNormalSolidColorBrush"] as SolidColorBrush;                    break;                default:                    break;            }        }    }}

Nuget Install-Package WPFDevelopers.Minimal