图片盒，双击&单击事件 [英] Picture box, Double click & Single click events

问题描述

我有一个奇怪的问题。我有一个图片框双击事件以及单击事件。问题是甚至我双击控件，单击事件被提出[如果我禁用单击事件，双击事件正在运行]。 此问题已在此讨论，但没有人给出正确答案

解决方案

有一个派生Picturebox控件类

  class PictureBoxCtrl：System.Windows.Forms.PictureBox 
 {
 //请注意，DoubleClickTime属性获取
 // 
之间允许的最大毫秒数//鼠标点击双击以使其有效。 
 int previousClick = SystemInformation.DoubleClickTime; 
公共新事件EventHandler DoubleClick; 
 
 protected override void OnClick（EventArgs e）
 {
 int now = System.Environment.TickCount; 
 //如果最近一次点击之后的时间是
 //，则会检测到双击。 
 if（now  -  previousClick <= SystemInformation.DoubleClickTime）
 {
 //提高DoubleClick事件。 
如果（DoubleClick！= null）
 DoubleClick（此为EventArgs.Empty）; 
} 
 //将previousClick设置为现在，以便可以检测到
 //后续的双击。 
 previousClick = now; 
 //允许基类提高常规的Click事件。 
 base.OnClick（e）; 
} 
 
 // DoubleClick事件的事件处理代码。 
 protected new virtual void OnDoubleClick（EventArgs e）
 {
 if（this.DoubleClick！= null）
 this.DoubleClick（this，e）; 
} 
} 
  

然后使用类

  PictureBoxCtrl imageControl = new PictureBoxCtrl（）; 
 imageControl.DoubleClick + = new EventHandler（picture_DoubleClick）; 
 imageControl.Click + = new EventHandler（picture_Click）; 
  

然后根据您的要求执行picture_Click和picture_DoubleClick

  void picture_Click（object sender，EventArgs e）
 {
 //自定义实现
} 
 
 void picture_DoubleClick（object发件人，EventArgs e）
 {
 //自定义实现
} 
  

此实施的参考

I have an strange issue. I have a picture box double click event as well as single click event. The problem is even I double click the control, single click event is raised [If I disable single click event, double click event is working]. This problem has been discussed here , but nobody gave a right answer

解决方案

Have a derived Picturebox control class

class PictureBoxCtrl:System.Windows.Forms.PictureBox
{
    // Note that the DoubleClickTime property gets 
    // the maximum number of milliseconds allowed between 
    // mouse clicks for a double-click to be valid.
    int previousClick = SystemInformation.DoubleClickTime;
    public new event EventHandler DoubleClick;

    protected override void OnClick(EventArgs e)
    {
        int now = System.Environment.TickCount;
        // A double-click is detected if the the time elapsed
        // since the last click is within DoubleClickTime.
        if (now - previousClick <= SystemInformation.DoubleClickTime)
        {
            // Raise the DoubleClick event.
            if (DoubleClick != null)
                DoubleClick(this, EventArgs.Empty);
        }
        // Set previousClick to now so that 
        // subsequent double-clicks can be detected.
        previousClick = now;
        // Allow the base class to raise the regular Click event.
        base.OnClick(e);
    }

    // Event handling code for the DoubleClick event.
    protected new virtual void OnDoubleClick(EventArgs e)
    {
        if (this.DoubleClick != null)
            this.DoubleClick(this, e);
    }
}

Then use create objects by using the class

            PictureBoxCtrl imageControl = new PictureBoxCtrl();               
            imageControl.DoubleClick += new EventHandler(picture_DoubleClick);
            imageControl.Click += new EventHandler(picture_Click);

Then Implement picture_Click and picture_DoubleClick with your requirements

void picture_Click(object sender, EventArgs e)
{
  //Custom Implementation
}

void picture_DoubleClick (object sender, EventArgs e)
{
  //Custom Implementation
}

Reference for this implementation

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