C#关于Windows窗体最大化所引起的闪烁问题的处理经验

1：窗体最大化前，窗体最好没有任何控件在显示，并且控件不要有背景图，等窗体最大化后才显示控件以及加载背景图。
2：最大化源码（从网上搜回来的：）

using System;using System.Windows.Forms;using System.Drawing;using System.Runtime.InteropServices;namespace XXXX.Definition{    public class WinApi    {        [DllImport("user32.dll", EntryPoint = "GetSystemMetrics")]        public static extern int GetSystemMetrics(int which);        [DllImport("user32.dll")]        public static extern void            SetWindowPos(IntPtr hwnd, IntPtr hwndInsertAfter,                         int X, int Y, int width, int height, uint flags);        private const int SM_CXSCREEN = 0;        private const int SM_CYSCREEN = 1;        private static IntPtr HWND_TOP = IntPtr.Zero;        private const int SWP_SHOWWINDOW = 64; // 0x0040        public static int ScreenX        {            get { return GetSystemMetrics(SM_CXSCREEN); }        }        public static int ScreenY        {            get { return GetSystemMetrics(SM_CYSCREEN); }        }        public static void SetWinFullScreen(IntPtr hwnd)        {            SetWindowPos(hwnd, HWND_TOP, 0, 0, ScreenX, ScreenY, SWP_SHOWWINDOW);        }    }    /// <summary>    /// Class used to preserve / restore state of the form    /// </summary>    public class FormState    {        private FormWindowState winState;        private FormBorderStyle brdStyle;        private bool topMost;        private Rectangle bounds;        private bool isMaximized = false;        public bool IsMaximized        {            get { return isMaximized; }        }        public void Maximize(Form targetForm)        {            if (!isMaximized)            {                targetForm.SuspendLayout();                isMaximized = true;                Save(targetForm);                targetForm.WindowState = FormWindowState.Maximized;                targetForm.FormBorderStyle = FormBorderStyle.None;                targetForm.TopMost = false;                WinApi.SetWinFullScreen(targetForm.Handle);                targetForm.ResumeLayout(true);            }        }        public void Save(Form targetForm)        {            targetForm.SuspendLayout();            winState = targetForm.WindowState;            brdStyle = targetForm.FormBorderStyle;            topMost = targetForm.TopMost;            bounds = targetForm.Bounds;            targetForm.ResumeLayout(true);        }        public void Restore(Form targetForm)        {            targetForm.WindowState = winState;            targetForm.FormBorderStyle = brdStyle;            targetForm.TopMost = topMost;            targetForm.Bounds = bounds;            isMaximized = false;        }    }}

下面是使用的代码：

        /// <summary>        /// 正常的窗体状态        /// </summary>        public  FormState FrmState=new FormState();//窗体点击esc时切换        private void MaxForm_KeyPress(object sender, KeyPressEventArgs e)        {            if (e.KeyChar == 27)                if (FrmState.IsMaximized)                    FrmState.Restore(this);                else                    FrmState.Maximize(this);        }

下面要留意的，就是闪烁问题的，大家留意下：
窗体的Shown事件：

        private void frm_Main_Shown(object sender, EventArgs e)        {            this.Visible = false;            FrmState.Maximize(this);            this.Visible = true;            //加载背景图            AutoLoadBackImage(); }

其实，窗体闪烁严重的在于窗体有很多控件或者是存在背景图。因此，在最大化前必须让窗体处于控件量最小，没有背景图的情况。在最大化后再对控件以及背景图进行加载。

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