在 C# 中如何知道何时单击按钮 [英] How to know when a button is clicked in C#

问题描述

请我在某些情况下需要你的帮助，关于 C# 中的按钮.我怎么知道什么时候点击了一个特定的按钮.我想使用 if 条件语句来编写事件.所以我希望它在点击特定按钮时做一些事情.我想将所有代码放在一个函数或类中，然后我可以随时调用它.例如

Pls I need your help in some cases about button in C#. How can I know when a particular button is clicked. I want to use the if condition statement to write the event. So I want it to do something when particular button is clicked. I want to put all the code inside one function or class then I can call it anytime. For example

private void showPanel()  
{  
    if (dashPanelButton.Clicked == true)  
    {  
        dashPanel.Visible = true;  
    }  
    else if(studInfoBtn.Clicked == true)  
    {  
        studInfoPanel.Visible = true;  
    }  
    else  
    {  
        homePanel.Visible = true; 
    }
}

请注意，上面的代码只是一个假设，并不是真正的工作代码.只是用来解释自己

Note the above code is just an assumption not really a working code. Just using it to explain myself

推荐答案

您不会检查按钮是否被点击".代码不会只是坐在那里等待点击发生.相反，您使用点击事件处理程序响应按钮点击":

You don't "check if a button is clicked". The code isn't going to just sit around and wait for that click to happen. Instead, you "respond to a button click" with a click event handler:

void myButton_Click(Object sender, EventArgs e)
{
    // do something when the button is clicked
}

您可以在设计器或代码中将处理程序附加到按钮上:

You can attach the handler to the button in the designer, or in code:

myButton.Click += new EventHandler(myButton_Click);

现在，如果您希望将相同的处理程序用于多个按钮，那么 Object sender 就变得有用了.这是对引发事件的对象的引用.所以在你的情况下，这将是被点击的按钮:

Now, if you want the same handler to be used for multiple buttons, that's where that Object sender becomes useful. That's a reference to the object which raised the event. So in your case, it would be the button which was clicked:

void myButton_Click(Object sender, EventArgs e)
{
    var theButton = (Button)sender;
    // now "theButton" is the button which was clicked
}

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