wpfbutton按钮禁用_WPF窗体关闭/放大/缩小按钮禁用、隐藏的实现

今天接到同事的一个需求，想把wpf中window窗体的关闭按钮禁用，他要在页面中写一个添加按钮点击函数调用this.close();来关闭窗体。

二话不说去百度了，然后找到一堆方法，实验结果都不相同，也出现一些问题。下面先放正确的方法：

借助user32.dll的API，disable关闭按钮(效果如下图)：

在页面的.xaml.cs文件window类中添加如下代码：

[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;

然后再window类的Loaded函数中添加如下代码：

var hwnd = new WindowInteropHelper(this).Handle; //获取window的句柄

IntPtr hMenu = GetSystemMenu(hwnd, 0);

RemoveMenu(hMenu, SC_CLOSE, MF_BYCOMMAND);

放大按钮禁用

直接在window中设置属性 ResizeMode="CanMinimize"即可。

彻底删除关闭按钮(效果如图)

这个方法会将页面logo，放大、缩小、关闭全部隐藏。

代码如下：

在window类里面添加：

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);

然后在类的Loaded函数中添加：

var hwnd = new WindowInteropHelper(this).Handle;

SetWindowLong(hwnd, GWL_STYLE, GetWindowLong(hwnd, GWL_STYLE) & ~WS_SYSMENU);

同上一个方法差不多，使用自定义类来实现，重用它并将它定义为窗口的附加属性，实现效果如下：

窗体上logo、标题、放大、缩小、关闭全都隐藏了。

代码如下：(新建一个类文件)

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

}

然后在window页面中使用：

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"

. . .

直接重写onlosing事件(缺点需要在任务管理器中才能关闭窗口)不推荐

在window类中添加：

protected override void OnClosing(System.ComponentModel.CancelEventArgs e)

{

e.Cancel = true;

}

我找到的差不多就这些方法了。下面是参考文

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

https://ask.helplib.com/220145

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