C# 将鼠标单击事件处理程序添加到图片框
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Adding a mouse click eventhandler to a PictureBox
提问by Arianule
I have a picturebox control and upon clicking it another PictureBox appears at a specific location. I.o.w it wasnt added from the toolbox.
我有一个图片框控件，单击它后，另一个图片框会出现在特定位置。Iow 它不是从工具箱中添加的。
PictureBox picOneFaceUpA = new PictureBox();
picOneFaceUpA.Location = new Point(42, 202);
picOneFaceUpA.Width = 90;
picOneFaceUpA.Height = 120;
picOneFaceUpA.Image = Image.FromFile("../../Resources/" + picFaceUpToBeMoved[0] + ".png");
Controls.Add(picOneFaceUpA);
picOneFaceUpA.BringToFront();
How would I add a MouseClick eventhandler to this control?
我将如何向该控件添加 MouseClick 事件处理程序？
Thanks
谢谢
采纳答案by Jon B
Just add an event handler using the +=operator:
只需使用+=运算符添加一个事件处理程序：
picOneFaceUpA.MouseClick += new MouseEventHandler(your_event_handler);
Or:
或者：
picOneFaceUpA.MouseClick += new MouseEventHandler((o, a) => code here);
回答by Sergey Berezovskiy
Best way in WinForms to subscribe to event - select your control in designer, go to Properties window and select events tab. Then choose any event you want (Click, MouseClick, etc) and double-click on space to the right of event name. Event handler will be generated and subscribed to event.
WinForms 中订阅事件的最佳方式 - 在设计器中选择您的控件，转到“属性”窗口并选择“事件”选项卡。然后选择您想要的任何事件（单击、鼠标单击等）并双击事件名称右侧的空格。将生成事件处理程序并订阅事件。
If you want to subscribe to event manually, then add event handler to event
如果要手动订阅事件，则将事件处理程序添加到事件
picOneFaceUpA.MouseClick += PicOneFaceUpA_MouseClick;
Hitting Tabafter you write +=will generate handler. Or you can write it manually:
Tab写入后点击+=将生成处理程序。或者您可以手动编写它：
void PicOneFaceUpA_MouseClick(object sender, MouseEventArgs e)
{
// handle click event
if (e.Button == MouseButtons.Left)
MessageBox.Show("Left button clicked");
}
BTWif you don't need additional info about click event (e.g. which button was clicked), then use Clickevent instead. It handles left button clicks by default:
顺便说一句，如果您不需要有关单击事件的其他信息（例如，单击了哪个按钮），请改用Click事件。它默认处理左键点击：
picOneFaceUpA.Click += PicOneFaceUpA_Click;
And handler:
和处理程序：
void PicOneFaceUpA_Click(object sender, EventArgs e)
{
// show another picture box
}
回答by John Koerner
If you type picOneFaceUpA.Click +=then hit tab, it will autocomplete for you and implement the event handler:
如果您输入picOneFaceUpA.Click +=然后点击选项卡，它将为您自动完成并实现事件处理程序：
private void button2_Click(object sender, EventArgs e)
{
PictureBox picOneFaceUpA= new PictureBox();
picOneFaceUpA.Click += new EventHandler(picOneFaceUpA_Click);
}
void picOneFaceUpA_Click(object sender, EventArgs e)
{
throw new NotImplementedException();
}
回答by Mr_Green
It seems you know how to add dynamic controls then you should just do
看来您知道如何添加动态控件，那么您应该这样做
this.picOneFaceUpA.MouseClick += new MouseEventHandler(yourMethodName); //hook
and to remove a event
并删除事件
this.picOneFaceUpA.MouseClick -= yourMethodName; //unhook
the method should be declared something like this:
该方法应声明如下：
private void yourMethodName(object sender, MouseEventArgs e)
{
//your code here
}
