Winform MessageBox.Show时居中到主页面

参考

(3条消息) .Net下Winform程序让MessageBox.Show显示在父窗体中间_aspnet2002web的博客-CSDN博客b

背景

最近winform项目不需要使用全屏显示了，还四分屏，半屏，各种骚操作要上线，被迫学习！！！

方案

重新定义一个类，集成MessageBox.Show方法到该类中，并加入一些处理代码，好将弹框展示到指定的控件中间

代码

using System;
using System.Windows.Forms;
using System.Text;
using System.Drawing;
using System.Runtime.InteropServices;namespace BingLing.UserControls
{public class MessageBoxBingLing{private static IWin32Window _owner;private static readonly HookProc _hookProc;private static IntPtr _hHook;[Obsolete]public static DialogResult Show(string text){Initialize();return MessageBox.Show(text);}[Obsolete]public static DialogResult Show(string text, string caption){Initialize();return MessageBox.Show(text, caption);}[Obsolete]public static DialogResult Show(string text, string caption, MessageBoxButtons buttons){Initialize();return MessageBox.Show(text, caption, buttons);}[Obsolete]public static DialogResult Show(string text, string caption, MessageBoxButtons buttons, MessageBoxIcon icon){Initialize();return MessageBox.Show(text, caption, buttons, icon);}[Obsolete]public static DialogResult Show(string text, string caption, MessageBoxButtons buttons, MessageBoxIcon icon, MessageBoxDefaultButton defButton){Initialize();return MessageBox.Show(text, caption, buttons, icon, defButton);}[Obsolete]public static DialogResult Show(string text, string caption, MessageBoxButtons buttons, MessageBoxIcon icon, MessageBoxDefaultButton defButton, MessageBoxOptions options){Initialize();return MessageBox.Show(text, caption, buttons, icon, defButton, options);}[Obsolete]public static DialogResult Show(IWin32Window owner, string text){_owner = owner;Initialize();return MessageBox.Show(owner, text);}[Obsolete]public static DialogResult Show(IWin32Window owner, string text, string caption){_owner = owner;Initialize();return MessageBox.Show(owner, text, caption);}[Obsolete]public static DialogResult Show(IWin32Window owner, string text, string caption, MessageBoxButtons buttons){_owner = owner;Initialize();return MessageBox.Show(owner, text, caption, buttons);}[Obsolete]public static DialogResult Show(IWin32Window owner, string text, string caption, MessageBoxButtons buttons, MessageBoxIcon icon){_owner = owner;Initialize();return MessageBox.Show(owner, text, caption, buttons, icon);}[Obsolete]public static DialogResult Show(IWin32Window owner, string text, string caption, MessageBoxButtons buttons, MessageBoxIcon icon, MessageBoxDefaultButton defButton){_owner = owner;Initialize();return MessageBox.Show(owner, text, caption, buttons, icon, defButton);}[Obsolete]public static DialogResult Show(IWin32Window owner, string text, string caption, MessageBoxButtons buttons, MessageBoxIcon icon, MessageBoxDefaultButton defButton, MessageBoxOptions options){_owner = owner;Initialize();return MessageBox.Show(owner, text, caption, buttons, icon,defButton, options);}public delegate IntPtr HookProc(int nCode, IntPtr wParam, IntPtr lParam);public delegate void TimerProc(IntPtr hWnd, uint uMsg, UIntPtr nIDEvent, uint dwTime);public const int WH_CALLWNDPROCRET = 12;public enum CbtHookAction : int{HCBT_MOVESIZE = 0,HCBT_MINMAX = 1,HCBT_QS = 2,HCBT_CREATEWND = 3,HCBT_DESTROYWND = 4,HCBT_ACTIVATE = 5,HCBT_CLICKSKIPPED = 6,HCBT_KEYSKIPPED = 7,HCBT_SYSCOMMAND = 8,HCBT_SETFOCUS = 9}[DllImport("user32.dll")]private static extern bool GetWindowRect(IntPtr hWnd, ref Rectangle lpRect);[DllImport("user32.dll")]private static extern int MoveWindow(IntPtr hWnd, int X, int Y, int nWidth, int nHeight, bool bRepaint);[DllImport("User32.dll")]public static extern UIntPtr SetTimer(IntPtr hWnd, UIntPtr nIDEvent, uint uElapse, TimerProc lpTimerFunc);[DllImport("User32.dll")]public static extern IntPtr SendMessage(IntPtr hWnd, int Msg, IntPtr wParam, IntPtr lParam);[DllImport("user32.dll")]public static extern IntPtr SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hInstance, int threadId);[DllImport("user32.dll")]public static extern int UnhookWindowsHookEx(IntPtr idHook);[DllImport("user32.dll")]public static extern IntPtr CallNextHookEx(IntPtr idHook, int nCode, IntPtr wParam, IntPtr lParam);[DllImport("user32.dll")]public static extern int GetWindowTextLength(IntPtr hWnd);[DllImport("user32.dll")]public static extern int GetWindowText(IntPtr hWnd, StringBuilder text, int maxLength);[DllImport("user32.dll")]public static extern int EndDialog(IntPtr hDlg, IntPtr nResult);[StructLayout(LayoutKind.Sequential)]public struct CWPRETSTRUCT{public IntPtr lResult;public IntPtr lParam;public IntPtr wParam;public uint message;public IntPtr hwnd;};static MessageBoxBingLing(){_hookProc = new HookProc(MessageBoxHookProc);_hHook = IntPtr.Zero;}[Obsolete]private static void Initialize(){if (_hHook != IntPtr.Zero){throw new NotSupportedException("this operation is not support!");}if (_owner != null){_hHook = SetWindowsHookEx(WH_CALLWNDPROCRET, _hookProc, IntPtr.Zero, AppDomain.GetCurrentThreadId());}}private static IntPtr MessageBoxHookProc(int nCode, IntPtr wParam, IntPtr lParam){if (nCode < 0){return CallNextHookEx(_hHook, nCode, wParam, lParam);}CWPRETSTRUCT msg = (CWPRETSTRUCT)Marshal.PtrToStructure(lParam, typeof(CWPRETSTRUCT));IntPtr hook = _hHook;if (msg.message == (int)CbtHookAction.HCBT_ACTIVATE){try{CenterWindow(msg.hwnd);}finally{UnhookWindowsHookEx(_hHook);_hHook = IntPtr.Zero;}}return CallNextHookEx(hook, nCode, wParam, lParam);}private static void CenterWindow(IntPtr hChildWnd){Rectangle recChild = new Rectangle(0, 0, 0, 0);_ = GetWindowRect(hChildWnd, ref recChild);int width = recChild.Width - recChild.X;int height = recChild.Height - recChild.Y;Rectangle recParent = new Rectangle(0, 0, 0, 0);_ = GetWindowRect(_owner.Handle, ref recParent);Point ptCenter = new Point(0, 0){X = recParent.X + ((recParent.Width - recParent.X) / 2),Y = recParent.Y + ((recParent.Height - recParent.Y) / 2)};Point ptStart = new Point(0, 0){X = (ptCenter.X - (width / 2)),Y = (ptCenter.Y - (height / 2))};ptStart.X = (ptStart.X < 0) ? 0 : ptStart.X;ptStart.Y = (ptStart.Y < 0) ? 0 : ptStart.Y;_ = MoveWindow(hChildWnd, ptStart.X, ptStart.Y, width, height, false);}}
}

使用

BingLing.UserControls.MessageBoxBingLing.Show(控件对象,"Hello World");

在原MessageBox.Show函数的基础上，前面加上控件对象即可。

比如我想展示在本窗体[this]的中间

BingLing.UserControls.MessageBoxBingLing.Show(this,"Hello World");

想展示在图片控件中间[pictureBox_Handson]的中间

BingLing.UserControls.MessageBoxBingLing.Show(pictureBox_Handson,"Hello World");

其余一些重载函数的用法就不一一列举了

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Winform MessageBox.Show时居中到主页面

参考

背景

方案

代码

使用

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