重绘DevExpress的XtraMessageBox消息提示框控件

     先来看提示框，可以看到框其实是一个去掉最大化、最小化按钮后的窗体，窗体的内容就是我们想要提示的内容，重绘提示框其实就是重绘窗体以及中间部分的内容。

    首先重绘窗体，消息提示框的窗体不是XtraForm而是XtraMessageBoxForm,重写CreateFormBorderPainter()方法。

internal class MessageBoxForm : XtraMessageBoxForm
    {
        protected override FormPainter CreateFormBorderPainter()
        {
            return new MessageBoxFormPainter(this, LookAndFeel);
        }
​
}

       MessageBoxFormPainter继承于FormPainter，窗体样式由此类绘制。窗体可重绘的部分包括窗体边框，border（边框）、caption（标题栏）、Frame（提示框中间部分和提示框左下右边之间部分）但不包括中间内容部分。重绘需要用GraphicsCache对选定区域进行重绘（Rectangle），如标题文字框（TextBounds）、标题栏框（CaptionBounds）等等。详细见下：

internal class MessageBoxFormPainter : FormPainter
{
    internal MessageBoxFormPainter(Control owner, ISkinProvider provider) :         base(owner, provider) { }
    /// <summary>
    /// 标题文字样式
    /// </summary>
    /// <param name="cache"></param>
   protected override void DrawText(GraphicsCache cache)
        {
            string text = Text;
            if (text == null || text.Length == 0 || TextBounds.IsEmpty)
                return;
            AppearanceObject appearance = new                      AppearanceObject(GetDefaultAppearance());
            appearance.Font = Owner.Font;  
            appearance.TextOptions.Trimming = Trimming.EllipsisCharacter;
          
            Rectangle r = RectangleHelper.GetCenterBounds(TextBounds, new Size(TextBounds.Width, appearance.CalcDefaultTextSize(cache.Graphics).Height));
            DrawTextShadow(cache, appearance, r);
​
            //cache.DrawString(text, appearance.Font, appearance.GetForeBrush(cache),r, appearance.GetStringFormat());
            cache.DrawString(text, appearance.Font, Color.Blue, r, appearance.GetStringFormat());   // 字体颜色、样式
        }
    /// <summary>
    /// 标题阴影
    /// </summary>
    /// <param name="cache"></param>
    /// <param name="appearance"></param>
    /// <param name="bounds"></param>
    protected override void DrawTextShadow(GraphicsCache cache, AppearanceObject appearance, Rectangle bounds)
    {
        base.DrawTextShadow(cache, appearance, bounds);
    }
    /// <summary>
    /// 标题文本框高度
    /// </summary>
    /// <param name="cache"></param>
    /// <param name="appearance"></param>
    /// <returns></returns>
    protected override int CalcTextHeight(GraphicsCache cache, AppearanceObject appearance)
    {
        return (int)(cache.Graphics.MeasureString(Text, Owner.Font).Height);
    }
    /// <summary>
    /// 标题栏高度
    /// </summary>
    /// <returns></returns>
    protected override int GetCaptionHeight()
    {
        return 30;
    }
    /// <summary>
    /// 画标题
    /// </summary>
    /// <param name="cache"></param>
    /// <param name="doubleBuffer"></param>
    protected override void DrawCaption(GraphicsCache cache, bool doubleBuffer)
    {
        base.DrawCaption(cache, doubleBuffer);
    }
    /// <summary>
    /// 画背景
    /// </summary>
    /// <param name="cache"></param>
    protected override void DrawBackground(GraphicsCache cache)
    {
        base.DrawBackground(cache);
​
        Rectangle r = RectangleHelper.GetCenterBounds(this.CaptionBounds, new Size(CaptionBounds.Width, CaptionBounds.Height));
        Brush linGrBrush = new LinearGradientBrush(r,
        Color.FromArgb(255, 255, 0, 0),
        Color.FromArgb(255, 0, 0, 255), 45);
        cache.FillRectangle(linGrBrush, r);
​
    }
    /// <summary>
    /// 画边框
    /// </summary>
    /// <param name="cache"></param>
    /// <param name="doubleBuffer"></param>
    protected override void DrawBorders(GraphicsCache cache, bool doubleBuffer)
    {
        base.DrawBorders(cache, doubleBuffer);
        //Rectangle r = RectangleHelper.GetCenterBounds(this.CaptionBounds, new Size(CaptionBounds.Width, CaptionBounds.Height));
        //Pen myPen = new Pen(Color.Black, 1);
        //cache.DrawRectangle(myPen, r);
    }
    /// <summary>
    /// 画展示内容周边（左、右、下部分）
    /// </summary>
    /// <param name="cache"></param>
    /// <param name="info"></param>
    /// <param name="kind">表示周边为左、右、下的哪一个</param>
    protected override void DrawFrameCore(GraphicsCache cache, SkinElementInfo info, FrameKind kind)
    {
        base.DrawFrameCore(cache, info, kind);
​
        Brush linGrBrush = new LinearGradientBrush(info.Bounds,
        Color.FromArgb(255, 255, 0, 0),
        Color.FromArgb(255, 0, 0, 255), 45);
        //Color.FromArgb(255, 119, 144, 237),
        //Color.FromArgb(255, 180, 154, 202), 45);
        cache.FillRectangle(linGrBrush, info.Bounds);
​
    }
    /// <summary>
    /// 画标题文字前图标
    /// </summary>
    /// <param name="cache"></param>
    public override void DrawIcon(GraphicsCache cache)
    {
        base.DrawIcon(cache);
        //cache.DrawIcon(SystemIcons.Warning,IconBounds);
    }
    /// <summary>
    /// 画标题栏按钮（最大化、最小化、关闭）
    /// </summary>
    /// <param name="cache"></param>
    /// <param name="useClip"></param>
    public override void DrawButtons(GraphicsCache cache, bool useClip)
    {
        //base.DrawButtons(cache, useClip);
        this.Buttons.Clear();
    }
}

       最后新建一个类NewXtraMessageBox，写一个用于弹出窗体的方法，返回值为DialogResult。

private static DialogResult ShowInternal(Control owner, string message, string caption, Icon messageIcon, params DialogResult[] dialogResults)
{
   MessageBoxForm form = new MessageBoxForm();
   XtraMessageBoxArgs args = new XtraMessageBoxArgs(owner, message, caption, dialogResults, messageIcon, 0);
   args.Showing += Args_Showing;
   return form.ShowMessageBoxDialog(args);
}

      XtraMessageBoxArgs便是提示框展示的内容部分，注册Args_Showing事件，在事件重绘窗体。这里也能重绘窗体，但能重绘的部分只包括在正常设计窗体时的属性部分（字体大小、边框样式、透明度等），提示框中间部分样式只能在此处修改。

/// <summary>
/// 此处修改form和button
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private static void Args_Showing(object sender, XtraMessageShowingArgs e)
{
    //改变form相关样式
    e.Form.Font = new Font("Arial", 14F);
    e.Form.LookAndFeel.UseDefaultLookAndFeel = false;
    e.Form.LookAndFeel.Style = DevExpress.LookAndFeel.LookAndFeelStyle.Skin;
    //e.Form.FormBorderStyle = FormBorderStyle.None;
​
    MessageButtonCollection buttons = e.Buttons;
    SimpleButton btn = null;
    foreach (var dialog in (DialogResult[])Enum.GetValues(typeof(DialogResult)))
    {
    btn = buttons[dialog];
​
    if (btn != null)
    {
       btn.Size = new Size(Convert.ToInt32(btn.Width * 1.2),                    Convert.ToInt32(btn.Height * 1.2)); //按钮大小
       btn.Font = e.Form.Font; //按钮字体
       btn.ShowFocusRectangle = DefaultBoolean.False;
     }
    if (dialog == DialogResult.OK) //通过DialogResult确定按钮并改变具体按钮样式
    {
       btn.Text = "‘是’按钮";
    }
    }
​
    }
}

       最后在此类中写Show方法，输入标题、内容、按钮类型、图标等信息调用ShowInternal方法，可自定义图标。

public static void Show(string message)
{
    ShowMessageBox(message, null, MessageBoxButtons.OK, null);
}
public static void Show(Control owner, string message)
{
    ShowInternal(owner, message, null, null, DialogResult.OK);
}
public static void Show(string message, string caption)
{
    ShowMessageBox(message, caption, MessageBoxButtons.OK, null);
}
public static void Show(string message, string caption, MessageBoxButtons messageBox)
{
    ShowMessageBox(message, caption, messageBox, null);
}
public static void Show(string message, string caption, MessageBoxIcon messageBoxIcon)
{
    if (messageBoxIcon == MessageBoxIcon.Warning)
    {
        ShowMessageBox(message, caption, MessageBoxButtons.OK, SystemIcons.Warning);
    }
    else if (messageBoxIcon == MessageBoxIcon.Question)
    {
        ShowMessageBox(message, caption, MessageBoxButtons.OK, SystemIcons.Question);
    }
    else if (messageBoxIcon == MessageBoxIcon.Error)
    {
        ShowMessageBox(message, caption, MessageBoxButtons.OK, SystemIcons.Error);
    }
    else if (messageBoxIcon == MessageBoxIcon.Information)
    {
        ShowMessageBox(message, caption, MessageBoxButtons.OK, SystemIcons.Information);
    }
    else if (messageBoxIcon == MessageBoxIcon.Asterisk)
    {
        ShowMessageBox(message, caption, MessageBoxButtons.OK, SystemIcons.Asterisk);
    }
    else if (messageBoxIcon == MessageBoxIcon.Exclamation)
    {
        ShowMessageBox(message, caption, MessageBoxButtons.OK, SystemIcons.Exclamation);
    }
    else if (messageBoxIcon == MessageBoxIcon.Hand)
    {
        ShowMessageBox(message, caption, MessageBoxButtons.OK, SystemIcons.Hand);
    }
    else
    {
        ShowMessageBox(message, caption, MessageBoxButtons.OK, null);
    }
}
public static void Show(string message, string caption, Icon icon)
{
    ShowMessageBox(message, caption, MessageBoxButtons.OK, icon);
}
public static void Show(string message, string caption, MessageBoxButtons messageBox, MessageBoxIcon messageBoxIcon)
{
    if (messageBoxIcon == MessageBoxIcon.Warning)
    {
        ShowMessageBox(message, caption, messageBox, SystemIcons.Warning);
    }
    else if (messageBoxIcon == MessageBoxIcon.Question)
    {
        ShowMessageBox(message, caption, messageBox, SystemIcons.Question);
    }
    else if (messageBoxIcon == MessageBoxIcon.Error)
    {
        ShowMessageBox(message, caption, messageBox, SystemIcons.Error);
    }
    else if (messageBoxIcon == MessageBoxIcon.Information)
    {
        ShowMessageBox(message, caption, messageBox, SystemIcons.Information);
    }
    else if (messageBoxIcon == MessageBoxIcon.Asterisk)
    {
        ShowMessageBox(message, caption, messageBox, SystemIcons.Asterisk);
    }
    else if (messageBoxIcon == MessageBoxIcon.Exclamation)
    {
        ShowMessageBox(message, caption, messageBox, SystemIcons.Exclamation);
    }
    else if (messageBoxIcon == MessageBoxIcon.Hand)
    {
        ShowMessageBox(message, caption, messageBox, SystemIcons.Hand);
    }
    else
    {
        ShowMessageBox(message, caption, messageBox, null);
    }
}
public static void Show(string message, string caption, MessageBoxButtons messageBox, Icon icon)
{
    ShowMessageBox(message, caption, messageBox, icon);
}
private static void ShowMessageBox(string message, string caption, MessageBoxButtons messageBox, Icon icon)
{
    if (messageBox == MessageBoxButtons.OK)
    {
        ShowInternal(null, message, caption, icon, DialogResult.OK);
    }
    else if (messageBox == MessageBoxButtons.OKCancel)
    {
        ShowInternal(null, message, caption, icon, new DialogResult[] { DialogResult.OK, DialogResult.Cancel });
    }
    else if (messageBox == MessageBoxButtons.YesNo)
    {
        ShowInternal(null, message, caption, icon, new DialogResult[] { DialogResult.Yes, DialogResult.No });
    }
    else if (messageBox == MessageBoxButtons.YesNoCancel)
    {
        ShowInternal(null, message, caption, icon, new DialogResult[] { DialogResult.Yes, DialogResult.No, DialogResult.Cancel });
    }
    else if (messageBox == MessageBoxButtons.RetryCancel)
    {
        ShowInternal(null, message, caption, icon, new DialogResult[] { DialogResult.Retry, DialogResult.Cancel });
    }
    else if (messageBox == MessageBoxButtons.AbortRetryIgnore)
    {
        ShowInternal(null, message, caption, icon, new DialogResult[] { DialogResult.Abort, DialogResult.Retry, DialogResult.Ignore });
    }
}

效果如下：

        通过重绘可以还可将背景改为图片、改变按钮位置等等、可进一步拓展。

       完整项目可以从我的csdn下载：https://download.csdn.net/download/weixin_52748738/18149812

 

 

 

 

附完整代码：

using DevExpress.Skins;
using DevExpress.Skins.XtraForm;
using DevExpress.Utils;
using DevExpress.Utils.Drawing;
using DevExpress.XtraEditors;
using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;
​
namespace TestMessageBox
{
    public static class NewMessageBox
    {
    #region show部分
    public static void Show(string message)
    {
        ShowMessageBox(message, null, MessageBoxButtons.OK, null);
    }
    public static void Show(Control owner, string message)
    {
        ShowInternal(owner, message, null, null, DialogResult.OK);
    }
    public static void Show(string message, string caption)
    {
        ShowMessageBox(message, caption, MessageBoxButtons.OK, null);
    }
    public static void Show(string message, string caption, MessageBoxButtons messageBox)
    {
        ShowMessageBox(message, caption, messageBox, null);
    }
    public static void Show(string message, string caption, MessageBoxIcon messageBoxIcon)
    {
        if (messageBoxIcon == MessageBoxIcon.Warning)
        {
            ShowMessageBox(message, caption, MessageBoxButtons.OK, SystemIcons.Warning);
        }
        else if (messageBoxIcon == MessageBoxIcon.Question)
        {
            ShowMessageBox(message, caption, MessageBoxButtons.OK, SystemIcons.Question);
        }
        else if (messageBoxIcon == MessageBoxIcon.Error)
        {
            ShowMessageBox(message, caption, MessageBoxButtons.OK, SystemIcons.Error);
        }
        else if (messageBoxIcon == MessageBoxIcon.Information)
        {
            ShowMessageBox(message, caption, MessageBoxButtons.OK, SystemIcons.Information);
        }
        else if (messageBoxIcon == MessageBoxIcon.Asterisk)
        {
            ShowMessageBox(message, caption, MessageBoxButtons.OK, SystemIcons.Asterisk);
        }
        else if (messageBoxIcon == MessageBoxIcon.Exclamation)
        {
            ShowMessageBox(message, caption, MessageBoxButtons.OK, SystemIcons.Exclamation);
        }
        else if (messageBoxIcon == MessageBoxIcon.Hand)
        {
            ShowMessageBox(message, caption, MessageBoxButtons.OK, SystemIcons.Hand);
        }
        else
        {
            ShowMessageBox(message, caption, MessageBoxButtons.OK, null);
        }
    }
    public static void Show(string message, string caption, Icon icon)
    {
        ShowMessageBox(message, caption, MessageBoxButtons.OK, icon);
    }
    public static void Show(string message, string caption, MessageBoxButtons messageBox, MessageBoxIcon messageBoxIcon)
    {
        if (messageBoxIcon == MessageBoxIcon.Warning)
        {
            ShowMessageBox(message, caption, messageBox, SystemIcons.Warning);
        }
        else if (messageBoxIcon == MessageBoxIcon.Question)
        {
            ShowMessageBox(message, caption, messageBox, SystemIcons.Question);
        }
        else if (messageBoxIcon == MessageBoxIcon.Error)
        {
            ShowMessageBox(message, caption, messageBox, SystemIcons.Error);
        }
        else if (messageBoxIcon == MessageBoxIcon.Information)
        {
            ShowMessageBox(message, caption, messageBox, SystemIcons.Information);
        }
        else if (messageBoxIcon == MessageBoxIcon.Asterisk)
        {
            ShowMessageBox(message, caption, messageBox, SystemIcons.Asterisk);
        }
        else if (messageBoxIcon == MessageBoxIcon.Exclamation)
        {
            ShowMessageBox(message, caption, messageBox, SystemIcons.Exclamation);
        }
        else if (messageBoxIcon == MessageBoxIcon.Hand)
        {
            ShowMessageBox(message, caption, messageBox, SystemIcons.Hand);
        }
        else
        {
            ShowMessageBox(message, caption, messageBox, null);
        }
    }
    public static void Show(string message, string caption, MessageBoxButtons messageBox, Icon icon)
    {
        ShowMessageBox(message, caption, messageBox, icon);
    }
    private static void ShowMessageBox(string message, string caption, MessageBoxButtons messageBox, Icon icon)
    {
        if (messageBox == MessageBoxButtons.OK)
        {
            ShowInternal(null, message, caption, icon, DialogResult.OK);
        }
        else if (messageBox == MessageBoxButtons.OKCancel)
        {
            ShowInternal(null, message, caption, icon, new DialogResult[] { DialogResult.OK, DialogResult.Cancel });
        }
        else if (messageBox == MessageBoxButtons.YesNo)
        {
            ShowInternal(null, message, caption, icon, new DialogResult[] { DialogResult.Yes, DialogResult.No });
        }
        else if (messageBox == MessageBoxButtons.YesNoCancel)
        {
            ShowInternal(null, message, caption, icon, new DialogResult[] { DialogResult.Yes, DialogResult.No, DialogResult.Cancel });
        }
        else if (messageBox == MessageBoxButtons.RetryCancel)
        {
            ShowInternal(null, message, caption, icon, new DialogResult[] { DialogResult.Retry, DialogResult.Cancel });
        }
        else if (messageBox == MessageBoxButtons.AbortRetryIgnore)
        {
            ShowInternal(null, message, caption, icon, new DialogResult[] { DialogResult.Abort, DialogResult.Retry, DialogResult.Ignore });
        }
    }
    #endregion
    private static DialogResult ShowInternal(Control owner, string message, string caption, Icon messageIcon, params DialogResult[] dialogResults)
    {
        MessageBoxForm form = new MessageBoxForm();
        XtraMessageBoxArgs args = new XtraMessageBoxArgs(owner, message, caption, dialogResults, messageIcon, 0);
        args.Showing += Args_Showing;
        return form.ShowMessageBoxDialog(args);
    }
​
    /// <summary>
    /// 此处修改form和button
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    private static void Args_Showing(object sender, XtraMessageShowingArgs e)
    {
        e.Form.Font = new Font("Arial", 14F);
        e.Form.LookAndFeel.UseDefaultLookAndFeel = false;
        e.Form.LookAndFeel.Style = DevExpress.LookAndFeel.LookAndFeelStyle.Skin;
        
        //e.Form.FormBorderStyle = FormBorderStyle.None;
​
        MessageButtonCollection buttons = e.Buttons;
        SimpleButton btn = null;
        foreach (var dialog in (DialogResult[])Enum.GetValues(typeof(DialogResult)))
        {
            btn = buttons[dialog];
​
            if (btn != null)
            {
                btn.Size = new Size(Convert.ToInt32(btn.Width * 1.2), Convert.ToInt32(btn.Height * 1.2)); //按钮大小
                btn.Font = e.Form.Font; //按钮字体
                btn.ShowFocusRectangle = DefaultBoolean.False;
            }
            if (dialog == DialogResult.OK)
            {
                btn.Text = "‘是’按钮";
            }
        }
​
    }
}
​
internal class MessageBoxForm : XtraMessageBoxForm
{
    protected override FormPainter CreateFormBorderPainter()
    {
        return new MessageBoxFormPainter(this, LookAndFeel);
    }
​
}
internal class MessageBoxFormPainter : FormPainter
{
    internal MessageBoxFormPainter(Control owner, ISkinProvider provider) : base(owner, provider) { }
​
    /// <summary>
    /// 标题文字样式
    /// </summary>
    /// <param name="cache"></param>
    protected override void DrawText(GraphicsCache cache)
    {
        string text = Text;
        if (text == null || text.Length == 0 || TextBounds.IsEmpty)
            return;
        AppearanceObject appearance = new AppearanceObject(GetDefaultAppearance());
        appearance.Font = Owner.Font;  
        appearance.TextOptions.Trimming = Trimming.EllipsisCharacter;
      
        Rectangle r = RectangleHelper.GetCenterBounds(TextBounds, new Size(TextBounds.Width, appearance.CalcDefaultTextSize(cache.Graphics).Height));
        DrawTextShadow(cache, appearance, r);
​
        //cache.DrawString(text, appearance.Font, appearance.GetForeBrush(cache),r, appearance.GetStringFormat());
        cache.DrawString(text, appearance.Font, Color.Blue, r, appearance.GetStringFormat());   // 字体颜色、样式
    }
    /// <summary>
    /// 标题阴影
    /// </summary>
    /// <param name="cache"></param>
    /// <param name="appearance"></param>
    /// <param name="bounds"></param>
    protected override void DrawTextShadow(GraphicsCache cache, AppearanceObject appearance, Rectangle bounds)
    {
        base.DrawTextShadow(cache, appearance, bounds);
    }
    /// <summary>
    /// 标题文本框高度
    /// </summary>
    /// <param name="cache"></param>
    /// <param name="appearance"></param>
    /// <returns></returns>
    protected override int CalcTextHeight(GraphicsCache cache, AppearanceObject appearance)
    {
        return (int)(cache.Graphics.MeasureString(Text, Owner.Font).Height);
    }
    /// <summary>
    /// 标题栏高度
    /// </summary>
    /// <returns></returns>
    protected override int GetCaptionHeight()
    {
        return 30;
    }
    /// <summary>
    /// 画标题
    /// </summary>
    /// <param name="cache"></param>
    /// <param name="doubleBuffer"></param>
    protected override void DrawCaption(GraphicsCache cache, bool doubleBuffer)
    {
        base.DrawCaption(cache, doubleBuffer);
    }
    /// <summary>
    /// 画背景
    /// </summary>
    /// <param name="cache"></param>
    protected override void DrawBackground(GraphicsCache cache)
    {
        base.DrawBackground(cache);
​
        Rectangle r = RectangleHelper.GetCenterBounds(this.CaptionBounds, new Size(CaptionBounds.Width, CaptionBounds.Height));
        Brush linGrBrush = new LinearGradientBrush(r,
        Color.FromArgb(255, 255, 0, 0),
        Color.FromArgb(255, 0, 0, 255), 45);
        cache.FillRectangle(linGrBrush, r);
​
    }
    /// <summary>
    /// 画边框
    /// </summary>
    /// <param name="cache"></param>
    /// <param name="doubleBuffer"></param>
    protected override void DrawBorders(GraphicsCache cache, bool doubleBuffer)
    {
        base.DrawBorders(cache, doubleBuffer);
        //Rectangle r = RectangleHelper.GetCenterBounds(this.CaptionBounds, new Size(CaptionBounds.Width, CaptionBounds.Height));
        //Pen myPen = new Pen(Color.Black, 1);
        //cache.DrawRectangle(myPen, r);
    }
    /// <summary>
    /// 画展示内容周边（左、右、下部分）
    /// </summary>
    /// <param name="cache"></param>
    /// <param name="info"></param>
    /// <param name="kind">表示周边为左、右、下的哪一个</param>
    protected override void DrawFrameCore(GraphicsCache cache, SkinElementInfo info, FrameKind kind)
    {
        base.DrawFrameCore(cache, info, kind);
​
        Brush linGrBrush = new LinearGradientBrush(info.Bounds,
        Color.FromArgb(255, 255, 0, 0),
        Color.FromArgb(255, 0, 0, 255), 45);
        //Color.FromArgb(255, 119, 144, 237),
        //Color.FromArgb(255, 180, 154, 202), 45);
        cache.FillRectangle(linGrBrush, info.Bounds);
​
    }
    /// <summary>
    /// 画标题文字前图标
    /// </summary>
    /// <param name="cache"></param>
    public override void DrawIcon(GraphicsCache cache)
    {
        base.DrawIcon(cache);
        //cache.DrawIcon(SystemIcons.Warning,IconBounds);
    }
    /// <summary>
    /// 画标题栏按钮（最大化、最小化、关闭）
    /// </summary>
    /// <param name="cache"></param>
    /// <param name="useClip"></param>
    public override void DrawButtons(GraphicsCache cache, bool useClip)
    {
        //base.DrawButtons(cache, useClip);
        this.Buttons.Clear();
    }
}
}
【推广】 免费学中医，健康全家人
原文地址：https://www.cnblogs.com/zn19961006/p/14706981.html