我正在WPF中写一个模态对话框。我如何设置一个WPF窗口没有关闭按钮?我仍然希望它的WindowState有一个正常的标题栏。
我找到了ResizeMode、WindowState和WindowStyle，但这些属性都不允许我隐藏关闭按钮，而是显示标题栏，就像在模态对话框中一样。
当前回答
使用这个，从https://stephenhaunts.com/2014/09/25/remove-the-close-button-from-a-wpf-window修改:
using System;
using System.Runtime.InteropServices;
using System.Windows;
using System.Windows.Input;
using System.Windows.Interop;
using System.Windows.Media;
namespace Whatever
{
public partial class MainMenu : Window
{
private const int GWL_STYLE = -16;
private const int WS_SYSMENU = 0x00080000;
[DllImport("user32.dll", SetLastError = true)]
private static extern int GetWindowLongPtr(IntPtr hWnd, int nIndex);
[DllImport("user32.dll")]
private static extern int SetWindowLong(IntPtr hWnd, int nIndex, int dwNewLong);
public MainMenu()
{
InitializeComponent();
this.Loaded += new RoutedEventHandler(Window_Loaded);
}
private void Window_Loaded(object sender, RoutedEventArgs e)
{
var hwnd = new WindowInteropHelper(this).Handle;
SetWindowLongPtr(hwnd, GWL_STYLE, GetWindowLongPtr(hwnd, GWL_STYLE) & ~WS_SYSMENU);
}
}
}
其他回答
使用这个，从https://stephenhaunts.com/2014/09/25/remove-the-close-button-from-a-wpf-window修改:
using System;
using System.Runtime.InteropServices;
using System.Windows;
using System.Windows.Input;
using System.Windows.Interop;
using System.Windows.Media;
namespace Whatever
{
public partial class MainMenu : Window
{
private const int GWL_STYLE = -16;
private const int WS_SYSMENU = 0x00080000;
[DllImport("user32.dll", SetLastError = true)]
private static extern int GetWindowLongPtr(IntPtr hWnd, int nIndex);
[DllImport("user32.dll")]
private static extern int SetWindowLong(IntPtr hWnd, int nIndex, int dwNewLong);
public MainMenu()
{
InitializeComponent();
this.Loaded += new RoutedEventHandler(Window_Loaded);
}
private void Window_Loaded(object sender, RoutedEventArgs e)
{
var hwnd = new WindowInteropHelper(this).Handle;
SetWindowLongPtr(hwnd, GWL_STYLE, GetWindowLongPtr(hwnd, GWL_STYLE) & ~WS_SYSMENU);
}
}
}
WPF没有一个内置的属性来隐藏标题栏的关闭按钮，但是你可以用几行P/Invoke来做到这一点。
首先，将这些声明添加到Window类中:
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);
然后把下面的代码放到Window的Loaded事件中:
var hwnd = new WindowInteropHelper(this).Handle;
SetWindowLong(hwnd, GWL_STYLE, GetWindowLong(hwnd, GWL_STYLE) & ~WS_SYSMENU);
这样就没有关闭按钮了。你也不会在标题栏的左边有一个窗口图标，这意味着没有系统菜单，即使你右键单击标题栏——它们都在一起。
重要提示:所有这些都是隐藏按钮。用户仍然可以关闭窗口!如果用户按下Alt+F4，或者通过任务栏关闭应用程序，窗口仍然会关闭。
如果你不想让窗口在后台线程完成之前关闭，那么你也可以覆盖OnClosing并将Cancel设置为true，就像Gabe建议的那样。
这不会隐藏按钮，但会阻止用户通过关闭窗口向前移动。
protected override void OnClosing(System.ComponentModel.CancelEventArgs e)
{
if (e.Cancel == false)
{
Application.Current.Shutdown();
}
}
我刚遇到类似的问题，乔怀特的解决方案似乎对我来说简单而干净。我重用了它，并将其定义为Window的附加属性
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XAML中，你只需要这样设置:
<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:u="clr-namespace:WafClient.Presentation.Behaviors"
ResizeMode="NoResize"
u:WindowBehavior.HideCloseButton="True">
...
</Window>
在寻找了很多答案之后，我想出了这个简单的解决方法，我将在这里分享，希望它能帮助到其他人。
我设置WindowStyle=0x10000000。
这设置了窗口样式的WS_VISIBLE (0x10000000)和WS_OVERLAPPED (0x0)值。"Overlapped"是显示标题栏和窗口边框的必要值。通过从我的样式值中删除WS_MINIMIZEBOX (0x20000)、WS_MAXIMIZEBOX (0x10000)和WS_SYSMENU (0x80000)值，标题栏中的所有按钮都被删除了，包括关闭按钮。
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