WPF窗體關閉/放大/縮小按鈕禁用、隱藏的實現

今天接到同事的一個需求，想把wpf中window窗體的關閉按鈕禁用，他要在頁面中寫一個添加按鈕點擊函數調用this.close();來關閉窗體。

二話不說去百度了，而後找到一堆方法，實驗結果都不相同，也出現一些問題。下面先放正確的方法：

•  藉助user32.dll的API，disable關閉按鈕（效果以下圖）：

 

在頁面的.xaml.cs文件window類中添加以下代碼：

[DllImport("USER32.DLL", CharSet = CharSet.Unicode)]
        private static extern IntPtr GetSystemMenu(IntPtr hWnd, UInt32 bRevert);
        [DllImport("USER32.DLL ", CharSet = CharSet.Unicode)]
        private static extern UInt32 RemoveMenu(IntPtr hMenu, UInt32 nPosition, UInt32 wFlags);
        private const UInt32 SC_CLOSE = 0x0000F060;
        private const UInt32 MF_BYCOMMAND = 0x00000000;

而後再window類的Loaded函數中添加以下代碼：

var hwnd = new WindowInteropHelper(this).Handle;  //獲取window的句柄
            IntPtr hMenu = GetSystemMenu(hwnd, 0);
            RemoveMenu(hMenu, SC_CLOSE, MF_BYCOMMAND);

• 放大按鈕禁用

直接在window中設置屬性 ResizeMode="CanMinimize"便可。

• 完全刪除關閉按鈕（效果如圖）

 

這個方法會將頁面logo，放大、縮小、關閉所有隱藏。

代碼以下：

在window類裏面添加：

private const int GWL_STYLE = -16;
        private const int WS_SYSMENU = 0x80000;
        [DllImport("user32.dll", SetLastError = true)]
        private static extern int GetWindowLong(IntPtr hWnd, int nIndex);
        [DllImport("user32.dll")]
        private static extern int SetWindowLong(IntPtr hWnd, int nIndex, int dwNewLong);

而後在類的Loaded函數中添加：

var hwnd = new WindowInteropHelper(this).Handle;
            SetWindowLong(hwnd, GWL_STYLE, GetWindowLong(hwnd, GWL_STYLE) & ~WS_SYSMENU);

 

同上一個方法差很少，使用自定義類來實現，重用它並將它定義爲窗口的附加屬性，實現效果以下：

窗體上logo、標題、放大、縮小、關閉全都隱藏了。

代碼以下：（新建一個類文件）

public class WindowBehavior
    {
        private static readonly Type OwnerType = typeof(WindowBehavior);

        #region HideCloseButton (attached property)

        public static readonly DependencyProperty HideCloseButtonProperty =
        DependencyProperty.RegisterAttached(
       "HideCloseButton",
        typeof(bool),
        OwnerType,
        new FrameworkPropertyMetadata(false, new PropertyChangedCallback(HideCloseButtonChangedCallback)));

        [AttachedPropertyBrowsableForType(typeof(Window))]
        public static bool GetHideCloseButton(Window obj)
        {
            return (bool)obj.GetValue(HideCloseButtonProperty);
        }

        [AttachedPropertyBrowsableForType(typeof(Window))]
        public static void SetHideCloseButton(Window obj, bool value)
        {
            obj.SetValue(HideCloseButtonProperty, value);
        }

        private static void HideCloseButtonChangedCallback(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            var window = d as Window;
            if (window == null) return;

            var hideCloseButton = (bool)e.NewValue;
            if (hideCloseButton && !GetIsHiddenCloseButton(window))
            {
                if (!window.IsLoaded)
                {
                    window.Loaded += HideWhenLoadedDelegate;
                }
                else
                {
                    HideCloseButton(window);
                }
                SetIsHiddenCloseButton(window, true);
            }
            else if (!hideCloseButton && GetIsHiddenCloseButton(window))
            {
                if (!window.IsLoaded)
                {
                    window.Loaded -= ShowWhenLoadedDelegate;
                }
                else
                {
                    ShowCloseButton(window);
                }
                SetIsHiddenCloseButton(window, false);
            }
        }

        #region Win32 imports

        private const int GWL_STYLE = -16;
        private const int WS_SYSMENU = 0x80000;
        [DllImport("user32.dll", SetLastError = true)]
        private static extern int GetWindowLong(IntPtr hWnd, int nIndex);
        [DllImport("user32.dll")]
        private static extern int SetWindowLong(IntPtr hWnd, int nIndex, int dwNewLong);

        #endregion

        private static readonly RoutedEventHandler HideWhenLoadedDelegate = (sender, args) => {
            if (sender is Window == false) return;
            var w = (Window)sender;
            HideCloseButton(w);
            w.Loaded -= HideWhenLoadedDelegate;
        };

        private static readonly RoutedEventHandler ShowWhenLoadedDelegate = (sender, args) => {
            if (sender is Window == false) return;
            var w = (Window)sender;
            ShowCloseButton(w);
            w.Loaded -= ShowWhenLoadedDelegate;
        };

        private static void HideCloseButton(Window w)
        {
            var hwnd = new WindowInteropHelper(w).Handle;
            SetWindowLong(hwnd, GWL_STYLE, GetWindowLong(hwnd, GWL_STYLE) & ~WS_SYSMENU);
        }

        private static void ShowCloseButton(Window w)
        {
            var hwnd = new WindowInteropHelper(w).Handle;
            SetWindowLong(hwnd, GWL_STYLE, GetWindowLong(hwnd, GWL_STYLE) | WS_SYSMENU);
        }

        #endregion

        #region IsHiddenCloseButton (readonly attached property)

        private static readonly DependencyPropertyKey IsHiddenCloseButtonKey =
        DependencyProperty.RegisterAttachedReadOnly(
       "IsHiddenCloseButton",
        typeof(bool),
        OwnerType,
        new FrameworkPropertyMetadata(false));

        public static readonly DependencyProperty IsHiddenCloseButtonProperty =
        IsHiddenCloseButtonKey.DependencyProperty;

        [AttachedPropertyBrowsableForType(typeof(Window))]
        public static bool GetIsHiddenCloseButton(Window obj)
        {
            return (bool)obj.GetValue(IsHiddenCloseButtonProperty);
        }

        private static void SetIsHiddenCloseButton(Window obj, bool value)
        {
            obj.SetValue(IsHiddenCloseButtonKey, value);
        }

        #endregion

    }

而後在window頁面中使用：

<Window 
 x:Class="WafClient.Presentation.Views.SampleWindow"
 xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
 xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
 xmlns:model="clr-namespace:EGIS.MISPlatform.Model;assembly=EGIS.MISPlatform"
 ResizeMode="NoResize"
 model:WindowBehavior.HideCloseButton="True"
 . . .
</Window>

• 直接重寫onlosing事件（缺點須要在任務管理器中才能關閉窗口）不推薦

 在window類中添加：

 protected override void OnClosing(System.ComponentModel.CancelEventArgs e)
        {
            e.Cancel = true; 
        } 

我找到的差很少就這些方法了。下面是參考文

http://www.cnblogs.com/khler/archive/2009/11/26/1611446.html

https://ask.helplib.com/220145

http://blog.csdn.net/gywtzh0889/article/details/47728569