WPF popup置顶

来源：互联网发布：为什么ps软件打不开编辑：程序博客网时间：2024/04/29 04:15

在程序写一个popup发现他会在置顶，在网上找了两大神代码http://www.cnblogs.com/Leaco/p/3164394.html

http://blog.csdn.net/baijinwen/article/details/6159043

继承 Popup

public class CCPopup : Popup    {        public static DependencyProperty TopmostProperty = Window.TopmostProperty.AddOwner(typeof(CCPopup), new FrameworkPropertyMetadata(false, OnTopmostChanged));        public bool Topmost        {            get { return (bool)GetValue(TopmostProperty); }            set { SetValue(TopmostProperty, value); }        }        private static void OnTopmostChanged(DependencyObject obj, DependencyPropertyChangedEventArgs e)        {            (obj as CCPopup).UpdateWindow();        }        protected override void OnOpened(EventArgs e)        {            UpdateWindow();        }        private void UpdateWindow()        {            var hwnd = ((HwndSource)PresentationSource.FromVisual(this.Child)).Handle;            RECT rect;            if (GetWindowRect(hwnd, out rect))            {                SetWindowPos(hwnd, Topmost ? -1 : -2, rect.Left, rect.Top, (int)this.Width, (int)this.Height, 0);            }        }        #region P/Invoke imports & definitions        [StructLayout(LayoutKind.Sequential)]        public struct RECT        {            public int Left;            public int Top;            public int Right;            public int Bottom;        }        [DllImport("user32.dll")]        [return: MarshalAs(UnmanagedType.Bool)]        private static extern bool GetWindowRect(IntPtr hWnd, out RECT lpRect);        [DllImport("user32", EntryPoint = "SetWindowPos")]        private static extern int SetWindowPos(IntPtr hWnd, int hwndInsertAfter, int x, int y, int cx, int cy, int wFlags);        #endregion    }

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