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自定义窗体封装WindowEx类代码：

using System;using System.Collections.Generic;using System.ComponentModel;using System.Linq;using System.Reflection;using System.Resources;using System.Text;using System.Threading;using System.Threading.Tasks;using System.Windows;using System.Windows.Input;using System.Windows.Media;using System.Windows.Resources;using System.Windows.Shapes;namespace SunCreate.Common.Controls{    /// 
    /// 窗体封装    /// 
    public class WindowEx : Window, INotifyPropertyChanged    {        public event EventHandler
      
        FixEvent;        private ResourceDictionary _resource;        private ICommand _WindowBtnCommand;        /// 
       
        /// 窗体按钮命令        /// 
        public ICommand WindowBtnCommand        {            get            {                return _WindowBtnCommand;            }            set            {                _WindowBtnCommand = value;                OnPropertyChanged("WindowBtnCommand");            }        }        private Thickness _BorderMargin = new Thickness(0, 0, 0, 0);        public Thickness BorderMargin        {            get            {                return _BorderMargin;            }            set            {                _BorderMargin = value;                OnPropertyChanged("BorderMargin");            }        }        private HorizontalAlignment _BtnPanelHorizontalAlignment = HorizontalAlignment.Right;        /// 
       
        /// 窗体按钮的Panel位置        /// 
        public HorizontalAlignment BtnPanelHorizontalAlignment        {            get            {                return _BtnPanelHorizontalAlignment;            }            set            {                _BtnPanelHorizontalAlignment = value;                OnPropertyChanged("BtnPanelHorizontalAlignment");            }        }        private Visibility _BtnMinimizeVisibility = Visibility.Visible;        /// 
       
        /// 窗体最小化按钮的显示状态        /// 
        public Visibility BtnMinimizeVisibility        {            get            {                return _BtnMinimizeVisibility;            }            set            {                _BtnMinimizeVisibility = value;                OnPropertyChanged("BtnMinimizeVisibility");            }        }        private Visibility _BtnMaximizeVisibility = Visibility.Visible;        /// 
       
        /// 窗体最大化按钮的显示状态        /// 
        public Visibility BtnMaximizeVisibility        {            get            {                return _BtnMaximizeVisibility;            }            set            {                _BtnMaximizeVisibility = value;                OnPropertyChanged("BtnMaximizeVisibility");            }        }        private Geometry _BtnMaximizePathData;        /// 
       
        /// 窗体最大化按钮的样式        /// 
        public Geometry BtnMaximizePathData        {            get            {                return _BtnMaximizePathData;            }            set            {                _BtnMaximizePathData = value;                OnPropertyChanged("BtnMaximizePathData");            }        }        private Visibility _TitleVisibility = Visibility.Visible;        /// 
       
        /// 是否显示标题        /// 
        public Visibility TitleVisibility        {            get            {                return _TitleVisibility;            }            set            {                _TitleVisibility = value;                OnPropertyChanged("TitleVisibility");            }        }        private WindowExTheme _Theme = WindowExTheme.Default;        /// 
       
        /// 窗体主题        /// 
        public WindowExTheme Theme        {            get            {                return _Theme;            }            set            {                _Theme = value;                OnPropertyChanged("Theme");            }        }        /// 
       
        /// 窗体 构造函数        /// 
        public WindowEx()        {            this.Loaded += WindowEx_Loaded;            this.DataContext = this;            #region 窗体样式设置            //this.AllowsTransparency = true; //AllowsTransparency会导致视频播放不显示            this.WindowStyle = WindowStyle.None;            #endregion            #region 窗体按钮事件            WindowBtnCommand windowBtnCommand = new WindowBtnCommand();            windowBtnCommand.DoAction = (parameter) =>            {                if (parameter == 1) //最小化                {                    MinimizedSet();                    this.WindowState = WindowState.Minimized;                }                if (parameter == 2) //窗口还原、最大化                {                    if (this.WindowState == WindowState.Normal)                    {                        MaximizedSet();                        this.WindowState = WindowState.Maximized;                    }                    else if (this.WindowState == WindowState.Maximized)                    {                        RestoredSet();                        this.WindowState = WindowState.Normal;                    }                    else if (this.WindowState == WindowState.Minimized)                    {                        RestoredSet();                        this.WindowState = WindowState.Normal;                    }                }                if (parameter == 3) //关闭窗口                {                    this.Close();                }                if (parameter == 4) //固定窗口                {                    if (FixEvent != null)                    {                        WindowExFixEventArgs args = new WindowExFixEventArgs(this.Content);                        FixEvent(this, args);                    }                }            };            this.WindowBtnCommand = windowBtnCommand;            this.StateChanged += (s, e) =>            {                if (this.WindowState == WindowState.Maximized)                {                    MaximizedSet();                }                if (this.WindowState == WindowState.Normal)                {                    RestoredSet();                }                if (this.WindowState == WindowState.Minimized)                {                    MinimizedSet();                }            };            #endregion        }        /// 
       
        /// 窗体Loaded        /// 
        private void WindowEx_Loaded(object sender, RoutedEventArgs e)        {            #region 窗体样式设置            Uri uri = null;            switch (Theme)            {                case WindowExTheme.Default:                    uri = new Uri("/SunCreate.Common.Controls;Component/WindowEx/WindowExResource.xaml", UriKind.Relative);                    break;                case WindowExTheme.MessageBox:                    uri = new Uri("/SunCreate.Common.Controls;Component/WindowEx/MessageBoxExResource.xaml", UriKind.Relative);                    break;                case WindowExTheme.TabContainer:                    uri = new Uri("/SunCreate.Common.Controls;Component/WindowEx/TabContainerResource.xaml", UriKind.Relative);                    break;            }            _resource = new ResourceDictionary();            _resource.Source = uri;            this.Style = _resource["stlWindowEx"] as Style;            if (this.WindowState == WindowState.Maximized)            {                this.BtnMaximizePathData = _resource["pathRestore"] as PathGeometry;            }            else            {                this.BtnMaximizePathData = _resource["pathMaximize"] as PathGeometry;            }            #endregion            #region 最大化设置            if (this.WindowState == WindowState.Maximized)            {                this.BorderMargin = CalculateWinMargin(true);            }            #endregion        }        #region 最小化设置        private void MinimizedSet()        {            this.BorderMargin = new Thickness(0, 0, 0, 0);            BtnPanelHorizontalAlignment = HorizontalAlignment.Left;            BtnMinimizeVisibility = Visibility.Collapsed;            if (this.Content != null) (this.Content as FrameworkElement).Visibility = Visibility.Collapsed; //最小化时隐藏Content            if (this.Theme == WindowExTheme.TabContainer) TitleVisibility = Visibility.Visible;            this.BtnMaximizePathData = _resource["pathRestore"] as PathGeometry;        }        #endregion        #region 还原设置        private void RestoredSet()        {            this.BorderMargin = new Thickness(0, 0, 0, 0);            BtnPanelHorizontalAlignment = HorizontalAlignment.Right;            BtnMinimizeVisibility = Visibility.Visible;            if (this.Content != null) (this.Content as FrameworkElement).Visibility = Visibility.Visible; //最大化或还原时显示Content            this.BtnMaximizePathData = _resource["pathMaximize"] as PathGeometry;            if (this.Theme == WindowExTheme.TabContainer) TitleVisibility = Visibility.Collapsed;        }        #endregion        #region 最大化设置        private void MaximizedSet()        {            this.BorderMargin = CalculateWinMargin(false);            BtnPanelHorizontalAlignment = HorizontalAlignment.Right;            BtnMinimizeVisibility = Visibility.Visible;            if (this.Content != null) (this.Content as FrameworkElement).Visibility = Visibility.Visible; //最大化或还原时显示Content            this.BtnMaximizePathData = _resource["pathRestore"] as PathGeometry;            if (this.Theme == WindowExTheme.TabContainer) TitleVisibility = Visibility.Collapsed;        }        #endregion        #region 计算窗体Margin大小        /// 
       
        /// 计算窗体Margin大小        /// 
        private Thickness CalculateWinMargin(bool firstLoad = false)        {            double taskBarHeight = SystemParameters.PrimaryScreenHeight - SystemParameters.WorkArea.Height;            double taskBarWidth = SystemParameters.PrimaryScreenWidth - SystemParameters.WorkArea.Width;            if (this.Theme == WindowExTheme.TabContainer || firstLoad)            {                if (taskBarWidth > 0)                {                    return new Thickness(7, 7, taskBarWidth + 7, 7);                }                if (taskBarHeight > 0)                {                    return new Thickness(7, 7, 7, taskBarHeight + 7);                }                return new Thickness(7, 7, 7, 7);            }            else            {                if (taskBarWidth > 0)                {                    return new Thickness(0, 0, taskBarWidth, 0);                }                if (taskBarHeight > 0)                {                    return new Thickness(0, 0, 0, taskBarHeight);                }                return new Thickness(0, 0, 0, 0);            }        }        #endregion        #region 实现INotifyPropertyChanged接口        public event PropertyChangedEventHandler PropertyChanged;        protected void OnPropertyChanged(string name)        {            if (PropertyChanged != null)            {                PropertyChanged(this, new PropertyChangedEventArgs(name));            }        }        #endregion    }}
      

窗体最小化、最大化、关闭按钮的命令WindowBtnCommand：

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Windows.Input;namespace SunCreate.Common.Controls{    public class WindowBtnCommand : ICommand    {        public Action
      
        DoAction { get; set; }        public event EventHandler CanExecuteChanged        {            add { CommandManager.RequerySuggested += value; }            remove { CommandManager.RequerySuggested -= value; }        }        public bool CanExecute(object parameter)        {            return true;        }        public void Execute(object parameter)        {            if (DoAction != null)            {                DoAction(Convert.ToInt32(parameter));            }        }    }}
      

使用WindowEx类的示例代码：

效果图：

窗体最小化效果图：