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C#中Winform 实现Ajax效果自定义按钮

作者：数据酷软件 时间：2022-05-14 08:22:51　

技术看点

  1.  WinForm自定义控件的使用

  2. 自定义控件gif动画的播放

需求及效果

又来一波 C# GDI自定义控件show 。这个控件已经使用几年了，最近找出来重构一下。原来是没有边框的，那么导致导航的功能不是很突出。本来想加个效果：在执行单击时显示Loading动画，在执行完单击事件后恢复原样。这就是网页里见到的局部刷新，Ajax常用的场景。需求来自几年前一个智能储物柜项目，人机界面有个美工设计好的效果图，为了省事和通用，需要一个透明的按钮来实现导航的任务。就是控件只是设计时可见，运行时不可见。

C#中Winform 实现Ajax效果自定义按钮

C#中Winform 实现Ajax效果自定义按钮

 C#中Winform 实现Ajax效果自定义按钮

关键点说明

1）、GraphicsPath实现矩形的圆角羽化处理


using (GraphicsPath path = new GraphicsPath())
  {
   #region 羽化，圆角处理
   path.StartFigure();
   path.AddArc(new Rectangle(new Point(rect.X, rect.Y), new Size(2 * Radius, 2 * Radius)), 180, 90);
   path.AddLine(new Point(rect.X + Radius, rect.Y), new Point(rect.Right - Radius, rect.Y));
   path.AddArc(new Rectangle(new Point(rect.Right - 2 * Radius, rect.Y), new Size(2 * Radius, 2 * Radius)), 270, 90);
   path.AddLine(new Point(rect.Right, rect.Y + Radius), new Point(rect.Right, rect.Bottom - Radius));
   path.AddArc(new Rectangle(new Point(rect.Right - 2 * Radius, rect.Bottom - 2 * Radius), new Size(2 * Radius, 2 * Radius)), 0, 90);
   path.AddLine(new Point(rect.Right - Radius, rect.Bottom), new Point(rect.X + Radius, rect.Bottom));
   path.AddArc(new Rectangle(new Point(rect.X, rect.Bottom - 2 * Radius), new Size(2 * Radius, 2 * Radius)), 90, 90);
   path.AddLine(new Point(rect.X, rect.Bottom - Radius), new Point(rect.X, rect.Y + Radius));
   path.CloseFigure();
   #endregion

要点就是画几段弧线和矩形连接起来。透明就是用了Color.FromArgb加上透明度，然后填充GraphicsPath形成透明区域。


g.FillPath(new SolidBrush(Color.FromArgb(153, BackColor)), path);

2)、单窗体应用如何模块化 

窗体只有一个，但操作界面好多个，由于是无人值守的应用。那么老是切换窗体操作是非常不方便的。工作区域是一个容器Panel,把每个操作界面定义成一个Panel作为只容器。


public partial class DepositBizPanel : UserControl
{
 private BackgroundStyle backgroundStyle = BackgroundStyle.Green;
 /// <summary>
 /// 主题风格
 /// </summary>
 public BackgroundStyle BackgroundStyle
 {
  get { return backgroundStyle; }
  set
  {
   backgroundStyle = value;
   switch (value)
   {
    case GreenlandExpressBox.BackgroundStyle.Blue:
     BackgroundImage = Properties.Resources.jbblue;
     break;
    case GreenlandExpressBox.BackgroundStyle.Orange:
     BackgroundImage = Properties.Resources.jborange;
     break;
    case GreenlandExpressBox.BackgroundStyle.Green:
     BackgroundImage = Properties.Resources.jbgreen;
     break;
   }
   Invalidate();
  }
 }

public Panel ParentPanel
 {
  get;
  set;
 }

public Bitmap QR_Barcode
 {
  get { return (Bitmap)pbxBarcode.Image; }
  set { pbxBarcode.Image = value; }
 }

public DialogResult PanelDiagResult
 {
  get;
  set;
 }

public DepositBizPanel(Panel parent, Bitmap barcode, BackgroundStyle style)
 {
  InitializeComponent();
  DoubleBuffered = true;
  ParentPanel = parent;
  QR_Barcode = barcode;
  BackgroundStyle = style;
 }  

private void btnback_Click(object sender, EventArgs e)
 {
  foreach (Control panel in ParentPanel.Controls)
  {
   if (panel is DepositBizPanel)
   {
    ParentPanel.Controls.Remove(panel);
    PanelDiagResult = DialogResult.Cancel;
    break;
   }
  }
 }

private void btnprocessnext_Click(object sender, EventArgs e)
 {
  foreach (Control panel in ParentPanel.Controls)
  {
   if (panel is DepositBizPanel)
   {
    ParentPanel.Controls.Remove(panel);
    PanelDiagResult = DialogResult.OK;
    break;
   }
  }
 }
}

人机操作界面例子

 3)、控件播放gif动画


private void BeginAnimate()
 {
  if (m_AnimateImage == null)
   return;
  if (ImageAnimator.CanAnimate(m_AnimateImage))
  {
   //当gif动画每隔一定时间后，都会变换一帧，那么就会触发一事件，
   //该方法就是将当前image每变换一帧时，都会调用当前这个委托所关联的方法。
   ImageAnimator.Animate(m_AnimateImage, m_evthdlAnimator);
  }
 }
 private void StopAnimate()
 {
  if (m_AnimateImage == null)
   return;
  try
  {
   if (ImageAnimator.CanAnimate(m_AnimateImage))
   {
    ImageAnimator.StopAnimate(m_AnimateImage, m_evthdlAnimator);
   }
  }
  finally
  {
   m_IsExecuted = false;
  }
 }
 private void UpdateImage()
 {
  if (m_AnimateImage == null)
   return;
  if (ImageAnimator.CanAnimate(m_AnimateImage))
  {
   //获得当前gif动画的下一步需要渲染的帧，当下一步任何对当前gif动画的操作都是对该帧进行操作)
   ImageAnimator.UpdateFrames(m_AnimateImage);
  }
 }
 private void OnImageAnimate(Object sender, EventArgs e)
 {
  Invalidate();
 }
 protected override void OnLoad(EventArgs e)
 {
  base.OnLoad(e);
  string s1 = @"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";
  byte[] buffer = Convert.FromBase64String(s1);
  MemoryStream ms = new MemoryStream(buffer);
  var srcImg = Image.FromStream(ms);
  m_AnimateImage = srcImg;
 }

OnLoad执行的操作是从base64字符串里反序列化图片，就是效果图中的Loading的gif图片。这里遇到一个问题：在关闭了MemoryStream之后，会出现“gdi+ 中发生一般性错误”，于是改为不关闭了，控件销毁之后占用的内存就会释放吧。这是一点隐忧，如果有好的办法，希望留言告知。

透明按钮自定义控件全部代码

第一版自定义按钮：


/// <summary>
/// Cool透明自定义按钮
/// </summary>
public partial class CoolTransparentButton : UserControl
{
 private Size iconSize = new Size(32, 32);
 public Size IconSize
 {
  get
  {
   return iconSize;
  }
  set
  {
   iconSize = value;
   Invalidate();
  }
 }
 private string _ButtonText;
 public string ButtonText
 {
  get { return _ButtonText; }
  set
  {
   _ButtonText = value;
   Invalidate();
  }
 }
 protected Image _IconImage;
 public Image IconImage
 {
  get
  {
   return _IconImage;
  }
  set
  {
   _IconImage = value;
   Invalidate();
  }
 }
 private bool _FocseActived = false;
 private Color _BorderColor = Color.White;
 public Color BorderColor
 {
  get
  {
   return _BorderColor;
  }
  set
  {
   _BorderColor = value;
   Invalidate();
  }
 }
 private int _Radius = 12;
 public int Radius
 {
  get
  {
   return _Radius;
  }
  set
  {
   _Radius = value;
   Invalidate();
  }
 }
 private bool ifDrawBorderWhenLostFocse = true;
 /// <summary>
 /// 失去焦点是否画边框
 /// </summary>
 public bool IfDrawBorderWhenLostFocse
 {
  get
  {
   return ifDrawBorderWhenLostFocse;
  }
  set
  {
   ifDrawBorderWhenLostFocse = value;
   Invalidate();
  }
 }
 /// <summary>
 /// 是否处于激活状态(焦点)
 /// </summary>
 public bool FocseActived
 {
  get { return _FocseActived; }
  set
  {
   _FocseActived = value;
   Invalidate();
  }
 }  
 public CoolTransparentButton()
 {
  DoubleBuffered = true;
  BackColor = Color.Transparent;
  SetStyle(ControlStyles.AllPaintingInWmPaint | ControlStyles.OptimizedDoubleBuffer | ControlStyles.ResizeRedraw, true);
  SetStyle(ControlStyles.Opaque, false);
  UpdateStyles();
 }
 protected override void OnPaint(PaintEventArgs e)
 {
  var rect = ClientRectangle;
  rect.Inflate(-1, -1);
  Graphics g = e.Graphics;
  g.SmoothingMode = SmoothingMode.HighQuality;
  using (GraphicsPath path = new GraphicsPath())
  {
   #region 羽化，圆角处理
   path.StartFigure();
   path.AddArc(new Rectangle(new Point(rect.X, rect.Y), new Size(2 * Radius, 2 * Radius)), 180, 90);
   path.AddLine(new Point(rect.X + Radius, rect.Y), new Point(rect.Right - Radius, rect.Y));
   path.AddArc(new Rectangle(new Point(rect.Right - 2 * Radius, rect.Y), new Size(2 * Radius, 2 * Radius)), 270, 90);
   path.AddLine(new Point(rect.Right, rect.Y + Radius), new Point(rect.Right, rect.Bottom - Radius));
   path.AddArc(new Rectangle(new Point(rect.Right - 2 * Radius, rect.Bottom - 2 * Radius), new Size(2 * Radius, 2 * Radius)), 0, 90);
   path.AddLine(new Point(rect.Right - Radius, rect.Bottom), new Point(rect.X + Radius, rect.Bottom));
   path.AddArc(new Rectangle(new Point(rect.X, rect.Bottom - 2 * Radius), new Size(2 * Radius, 2 * Radius)), 90, 90);
   path.AddLine(new Point(rect.X, rect.Bottom - Radius), new Point(rect.X, rect.Y + Radius));
   path.CloseFigure();
   #endregion
   if (!FocseActived)
   {
    if (ifDrawBorderWhenLostFocse)
     g.DrawPath(new Pen(Color.Gray, 1), path);
    g.FillPath(new SolidBrush(Color.FromArgb(66, BackColor)), path);
   }
   else
   {
    g.DrawPath(new Pen(BorderColor, 1), path);
    rect.Inflate(-1, -1);
    g.FillPath(new SolidBrush(Color.FromArgb(153, BackColor)), path);
   }
   #region 画文本
   g.SmoothingMode = SmoothingMode.AntiAlias;
   if (IconImage != null)
   {
    Rectangle rc = new Rectangle((Width - 32) / 2, 16, IconSize.Width, IconSize.Height);
    g.DrawImage(IconImage, rc);
   }
   if (!string.IsNullOrEmpty(ButtonText))
   {
    using (StringFormat f = new StringFormat())
    {
     Rectangle rectTxt = new Rectangle(0, (Height - 18) / 2, Width, 36);
     f.Alignment = StringAlignment.Center;// 水平居中对齐
     f.LineAlignment = StringAlignment.Center; // 垂直居中对齐
     f.FormatFlags = StringFormatFlags.NoWrap;// 设置为单行文本
     SolidBrush fb = new SolidBrush(this.ForeColor); // 绘制文本
     e.Graphics.DrawString(ButtonText, new Font("微软雅黑", 16F, FontStyle.Bold), fb, rectTxt, f);
    }
   }
   #endregion
  }
 }
 protected override void OnMouseHover(EventArgs e)
 {
  FocseActived = true;
 }
 protected override void OnMouseLeave(EventArgs e)
 {
  FocseActived = false;
 }
 protected override void OnEnter(EventArgs e)
 {
  FocseActived = true;
 }
 protected override void OnLeave(EventArgs e)
 {
  FocseActived = false;
 }
}

第二版自定义按钮：


/// <summary>
/// 自定义透明自定义按钮，模仿实现了网页元素的Ajax效果
/// </summary>
public partial class AjaxTransparentButton : UserControl
{
 private Size iconSize = new Size(32, 32);
 public Size IconSize
 {
  get
  {
   return iconSize;
  }
  set
  {
   iconSize = value;
   Invalidate();
  }
 }
 private string _ButtonText;
 public string ButtonText
 {
  get { return _ButtonText; }
  set
  {
   _ButtonText = value;
   Invalidate();
  }
 }
 protected Image _IconImage;
 public Image IconImage
 {
  get
  {
   return _IconImage;
  }
  set
  {
   _IconImage = value;
   Invalidate();
  }
 }
 private bool _FocseActived = false;
 private Color _BorderColor = Color.White;
 public Color BorderColor
 {
  get
  {
   return _BorderColor;
  }
  set
  {
   _BorderColor = value;
   Invalidate();
  }
 }
 private int _Radius = 12;
 public int Radius
 {
  get
  {
   return _Radius;
  }
  set
  {
   _Radius = value;
   Invalidate();
  }
 }
 private bool ifDrawBorderWhenLostFocse = true;
 /// <summary>
 /// 失去焦点是否画边框
 /// </summary>
 public bool IfDrawBorderWhenLostFocse
 {
  get
  {
   return ifDrawBorderWhenLostFocse;
  }
  set
  {
   ifDrawBorderWhenLostFocse = value;
   Invalidate();
  }
 }
 /// <summary>
 /// 是否处于激活状态(焦点)
 /// </summary>
 public bool FocseActived
 {
  get { return _FocseActived; }
  set
  {
   _FocseActived = value;
   Invalidate();
  }
 }
 private Image m_AnimateImage = null;
 private EventHandler m_evthdlAnimator = null;
 private bool m_IsExecuted = false;
 public AjaxTransparentButton()
 {
  BackColor = Color.Transparent;
  SetStyle(ControlStyles.AllPaintingInWmPaint | ControlStyles.OptimizedDoubleBuffer | ControlStyles.ResizeRedraw | ControlStyles.UserPaint, true);
  SetStyle(ControlStyles.Opaque, false);
  UpdateStyles();
  m_evthdlAnimator = new EventHandler(OnImageAnimate);
 }
 protected override void OnPaint(PaintEventArgs e)
 {
  var rect = ClientRectangle;
  rect.Inflate(-1, -1);
  Graphics g = e.Graphics;
  g.SmoothingMode = SmoothingMode.HighQuality;
  using (GraphicsPath path = new GraphicsPath())
  {
   #region 羽化，圆角处理
   path.StartFigure();
   path.AddArc(new Rectangle(new Point(rect.X, rect.Y), new Size(2 * Radius, 2 * Radius)), 180, 90);
   path.AddLine(new Point(rect.X + Radius, rect.Y), new Point(rect.Right - Radius, rect.Y));
   path.AddArc(new Rectangle(new Point(rect.Right - 2 * Radius, rect.Y), new Size(2 * Radius, 2 * Radius)), 270, 90);
   path.AddLine(new Point(rect.Right, rect.Y + Radius), new Point(rect.Right, rect.Bottom - Radius));
   path.AddArc(new Rectangle(new Point(rect.Right - 2 * Radius, rect.Bottom - 2 * Radius), new Size(2 * Radius, 2 * Radius)), 0, 90);
   path.AddLine(new Point(rect.Right - Radius, rect.Bottom), new Point(rect.X + Radius, rect.Bottom));
   path.AddArc(new Rectangle(new Point(rect.X, rect.Bottom - 2 * Radius), new Size(2 * Radius, 2 * Radius)), 90, 90);
   path.AddLine(new Point(rect.X, rect.Bottom - Radius), new Point(rect.X, rect.Y + Radius));
   path.CloseFigure();
   #endregion
   if (!FocseActived)
   {
    if (ifDrawBorderWhenLostFocse)
     g.DrawPath(new Pen(Color.Gray, 1), path);
    g.FillPath(new SolidBrush(Color.FromArgb(66, BackColor)), path);
   }
   else
   {
    g.DrawPath(new Pen(BorderColor, 1), path);
    rect.Inflate(-1, -1);
    g.FillPath(new SolidBrush(Color.FromArgb(153, BackColor)), path);
   }
   #region 画文本
   g.SmoothingMode = SmoothingMode.AntiAlias;
   if (IconImage != null)
   {
    Rectangle rc = new Rectangle((Width - 32) / 2, 16, IconSize.Width, IconSize.Height);
    g.DrawImage(IconImage, rc);
   }
   if (!string.IsNullOrEmpty(ButtonText))
   {
    using (StringFormat f = new StringFormat())
    {
     Rectangle rectTxt = new Rectangle(0, (Height - 18) / 2, Width, 36);
     f.Alignment = StringAlignment.Center;// 水平居中对齐
     f.LineAlignment = StringAlignment.Center; // 垂直居中对齐
     f.FormatFlags = StringFormatFlags.NoWrap;// 设置为单行文本
     SolidBrush fb = new SolidBrush(this.ForeColor); // 绘制文本
     e.Graphics.DrawString(ButtonText, new Font("微软雅黑", 16F, FontStyle.Bold), fb, rectTxt, f);
    }
   }
   if (m_AnimateImage != null)
   {
    Rectangle rectGif = new Rectangle((Width - 24) / 2, (Height - 16) / 2 - 8, 32, 32);
    if (m_IsExecuted)
    {
     UpdateImage();
     e.Graphics.DrawImage(m_AnimateImage, rectGif);
    }
    else
    {
     e.Graphics.FillRectangle(new SolidBrush(Color.Transparent), rectGif);
    }
   }
   #endregion
  }
 }
 protected override void OnMouseHover(EventArgs e)
 {
  FocseActived = true;
 }
 protected override void OnMouseLeave(EventArgs e)
 {
  FocseActived = false;
 }
 protected override void OnEnter(EventArgs e)
 {
  FocseActived = true;
 }
 protected override void OnLeave(EventArgs e)
 {
  FocseActived = false;
 }
 private void BeginAnimate()
 {
  if (m_AnimateImage == null)
   return;
  if (ImageAnimator.CanAnimate(m_AnimateImage))
  {
   //当gif动画每隔一定时间后，都会变换一帧，那么就会触发一事件，
   //该方法就是将当前image每变换一帧时，都会调用当前这个委托所关联的方法。
   ImageAnimator.Animate(m_AnimateImage, m_evthdlAnimator);
  }
 }
 private void StopAnimate()
 {
  if (m_AnimateImage == null)
   return;
  try
  {
   if (ImageAnimator.CanAnimate(m_AnimateImage))
   {
    ImageAnimator.StopAnimate(m_AnimateImage, m_evthdlAnimator);
   }
  }
  finally
  {
   m_IsExecuted = false;
  }
 }
 private void UpdateImage()
 {
  if (m_AnimateImage == null)
   return;
  if (ImageAnimator.CanAnimate(m_AnimateImage))
  {
   //获得当前gif动画的下一步需要渲染的帧，当下一步任何对当前gif动画的操作都是对该帧进行操作)
   ImageAnimator.UpdateFrames(m_AnimateImage);
  }
 }
 private void OnImageAnimate(Object sender, EventArgs e)
 {
  Invalidate();
 }
 protected override void OnLoad(EventArgs e)
 {
  base.OnLoad(e);
  string s1 = @"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";
  byte[] buffer = Convert.FromBase64String(s1);
  MemoryStream ms = new MemoryStream(buffer);
  var srcImg = Image.FromStream(ms);
  m_AnimateImage = srcImg;
 }
 protected override void OnClick(EventArgs e)
 {
  if (m_IsExecuted)
   return;
  Action clickTask = () =>
  {
   m_IsExecuted = true;
   BeginAnimate();
   base.OnClick(e);
   Invalidate();
  };
  //异步执行单击事件
  clickTask.BeginInvoke((result) =>
  {
   clickTask.EndInvoke(result);
   m_IsExecuted = false;
   StopAnimate();
  }, null);
 }
 protected override void Dispose(bool disposing)
 {
  base.Dispose(disposing);
  if (m_AnimateImage != null)
  {
   try
   {
    StopAnimate();
   }
   finally
   {
    m_AnimateImage.Dispose();
    m_evthdlAnimator = null;
   }
  }
 }
 protected override void OnKeyDown(KeyEventArgs e)
 {
  base.OnKeyDown(e);
  if (e.KeyCode == Keys.Enter)
  {
   OnClick(e);
  }
 }
}

注释不是很多，源码如有需要拿走不谢

来源：http://www.cnblogs.com/datacool/p/datacool_2017_ajax_button.html

标签：Winform,Ajax
0
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