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C#中Winform 实现Ajax效果自定义按钮

︶ㄣ米米素材网 メ
米米素材网V管理员 / 阅读
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这篇文章主要介绍了C#中Winform 实现Ajax效果自定义按钮的相关资料,需要的朋友可以参考下

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

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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。
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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。

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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

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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：

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/// <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：
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/// <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 = @"r0lgodlhiaagalmaap///7ozs/v7+9bw1uhh4fly8rq6uogbgtq0naebarsbg8texjexl/39/vruvaaaach/c05fvfndqvbfmi4waweaaaah+qqfbqaaacwaaaaaiaagaaae5xdissllrornp0pknrcdfhxvoljlejquosgopsyt4rownssvyw1ica16k8mmmrkcbjskbtfdazyuaekqcfxiq2hgqrfvaqeeijnxvdw6xne4yagrjubcwe60smqudnd4rz1zaqznfagdd0hihh12cee9kjaevlycxig7basmb6slnj87paqbskikoqusnbmdmdc2txqlkuhziytywtxify6be8wjt5yevpjivxnagmlht0vnoggyf0dzxs7apdpb309rnhog5gdqxgldac457d1zz/v/nmom82xihqjykhkp1ozmaddeaaah+qqfbqaaacwaaaaagaaxaaaechdisaskneujfkohs4muyljikmjiv54soypsa0wmlsnqotetbw52mg0ajhypbxioeqrny8v0qfznw+ggwljki4lbqx1ibgjmkrighwjrzcdti2/gh7d9qn774wqgayoefwcchiv/gymdho+qkzktr3p7eqah+qqfbqaaacwbaaaahqaoaaaechdiswdanesnhhjzwe2duseo5sjkkb2hokgyfld1cb/dneoilkti2plyukgeatmbaaacsygbedyd4zn1yiemh0scqqgyehnmtnnaksqjxmbuueypi9ecau/ufnnzeup9vbqebofolmfxwhnoqw6rweoceqah+qqfbqaaacwhaaaagqaraaaeardicdzznovndsvfbhbddpwzgohbge3nqaki0ayejeqogmqdlkenazbujhra0cobyhlvskm4saaawkahcfawtu0a4rxzfwjnzxfwjjwb9ptihru5dvghl+/7nqmbggo/fykhcx8aiameeqah+qqfbqaaacwoaaaaegayaaaezxcwaaq9odamdouai17mcydhwa3mcypb1rooxbktmsbt944bu6zcqcbqiwpb4jaihick86irtb20qvwp7xq/fyv4tnwnz4oqwoeigl0hx/eqsli69bociktke2vvdap5d1p0cw4rach5baufaaaala4aaaasab4aaasakbgcqr3ybimxvkeimsxxhcffpizqbatxisbclibgand+ijygq2i4haamwxbgnhj8bebzgpnnjz7lwpnfdlvglgjmdnw/5drcrhae3xbkm6fqwot1xdnpwcvcjgcjmgeiecyocqlrf4ymbiojvv2ccxzvcoohbwgrcaikcmfujheaifkebquaaaasdwababeahwaabhsqyakgorivelinnoflbjem1bcifbdcbmutkqdtn0cujru5njqrymh5vifttkjcoj2hqjqrheqvqguu+uw6awgewxkoo55lxiihodjky8pbothpxmpayi+hkzoeewktdhkzghmidcoihiuhfbmojxinlr4kcw1odalxsxeaifkebquaaaascaaoabgaegaabgwqyekrcdgbyvvmoof5ilanaiogkroch9hacd3mfmhubzmhibtgwjmbfoldb4goggbcackrcaauwamzowjqexysqsjgwj0kqvkaltiyphp1lbfttp10is6mt5gdvfx1brn8ftsvcaqdob9+kheaifkebquaaaasagasab0adgaabhgqyemrbeps4bqdqzbdr5ichmwegufqgwkakbwwwsihc4lonsxhbscsqoosscgqdjiwwohqnaxwbiyjnxeofciewdi9jczesey7gwmm5doeww4jjoypqq743u1wctv0cgfzbhj5xclfhyd/ewznhoyvdgiofhkqnreaifkebquaaaasaaapabkaeqaabgeqquqrudjrw3vaycz5x2ie6ekckaootasi7ytntq046bbsnctvitz4aotmwkzbic6h6cvajacct0cubtgatg5ntcu9gkidempjg5ybbopwlnvzlwtqyknzagzwahomb2m3ggshsrsrach5baufaaaalaeacaarabgaaarcmkr0gl34npkuyycacamyhbijkgi2uw02vhft33iu7yididad4/ereygdlu/nubaoj9dvc2ecdgfayiuaxs3bboh6mic5iap5eh5fk2exc4tpgwzyiyfgvhembbeaifkebquaaaasaaacaa4ahqaabhmqyanyovislfdgxbj808ep5krwv8qeg+prcoeoiokmwjk0ekcu54h9aoghkgximzgaapqzcccu2ax2o6nuud2pmjcyha4l0udm/ljydcngfgakjqe5yh0wubybauyfbifkhwabgxkdgx5lgxphaxcpbisrads=";
   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
原文链接：http://www.cnblogs.com/datacool/p/datacool_2017_ajax_button.html