WPF 桌面应用程序 - 即使 ResizeMode 为 CanMinimize 也无法禁用最大化

Posted 2023-04-01

【中文标题】WPF 桌面应用程序 - 即使 ResizeMode 为 CanMinimize 也无法禁用最大化

【英文标题】：WPF Desktop app - Failing to disable Maximize even when ResizeMode is CanMinimize

【发布时间】：2021-12-01 11:17:08

【问题描述】：

C# WPF 桌面应用程序 - 即使在自定义窗口控件中 ResizeMode 为 CanMinimize 时，也无法禁用最大化。图片符合预期：

尝试在控件的上部声明中在 XAML 中设置 ResizeMode="CanMinimize"。甚至尝试放入控制构造函数：

        public MaterialWindow()
        
            WindowChrome.SetWindowChrome(this, new WindowChrome()
            
                CaptionHeight = 32,
                NonClientFrameEdges = NonClientFrameEdges.None,
                ResizeBorderThickness = new Thickness(4),
                UseAeroCaptionButtons = true
            );
            ResizeMode = ResizeMode.CanMinimize; //  <= 

            CommandBindings.Add(new CommandBinding(SystemCommands.CloseWindowCommand, CloseWindow_Exec, CloseWindow_CanExec));
            CommandBindings.Add(new CommandBinding(SystemCommands.MinimizeWindowCommand, MinimizeWindow_Exec, MinimizeWindow_CanExec));
            CommandBindings.Add(new CommandBinding(SystemCommands.MaximizeWindowCommand, MaximizeWindow_Exec, MaximizeWindow_CanExec));
            CommandBindings.Add(new CommandBinding(SystemCommands.RestoreWindowCommand, RestoreWindow_Exec, RestoreWindow_CanExec));
            CommandBindings.Add(new CommandBinding(SystemCommands.ShowSystemMenuCommand, ShowSystemMenu_Exec, ShowSystemMenu_CanExec));
        

甚至尝试在自定义窗口构建后调用设置 ResizeMode 的方法：

ResizeMode = ResizeMode.CanMinimize; // window can only be minimized and restored

【参考方案1】：

通过清除命令绑定最大化来修复。显然，如果绑定到位，它将不会遵守 ResizeMode.CanMinimize：

        public void DisableMaximize()
        
            // clear the command bindings and set all EXCEPT MAXIMIZE command
            CommandBindings.Clear();
            CommandBindings.Add(new CommandBinding(SystemCommands.CloseWindowCommand, CloseWindow_Exec, CloseWindow_CanExec));
            CommandBindings.Add(new CommandBinding(SystemCommands.MinimizeWindowCommand, MinimizeWindow_Exec, MinimizeWindow_CanExec));
            //CommandBindings.Add(new CommandBinding(SystemCommands.MaximizeWindowCommand, MaximizeWindow_Exec, MaximizeWindow_CanExec));
            CommandBindings.Add(new CommandBinding(SystemCommands.RestoreWindowCommand, RestoreWindow_Exec, RestoreWindow_CanExec));
            CommandBindings.Add(new CommandBinding(SystemCommands.ShowSystemMenuCommand, ShowSystemMenu_Exec, ShowSystemMenu_CanExec));

            this.ResizeMode = ResizeMode.CanMinimize; // window can only be minimized and restored