如何知道何时在C＃中单击按钮

Question

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; 
    }
}

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

Answer 1

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
}

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

myButton.Click += new EventHandler(myButton_Click);

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
}

Answer 2

Register the button Click event and do whatever you want in the event handler like

dashPanelButton.Click += new EventHandler(myhandler);

protected void myhandler(object sender, EventArgs e)
{
  //do whatever you want
}

Answer 3

You can do what you want, like this:

private void showPanel(Object sender, EventArgs e)
    {
        if (sender == dashPanelButton)
        {
            dashPanel.Visible = true;
        }
        else if (sender == studInfoBtn)
        {
            studInfoBtn.Visible = true;
        }
        else
        {
            homePanel.Visible = true;
        }
    }

make sure your button is wired correctly

dashPanelButton.Click += new EventHandler(showPanel);
studInfoBtn.Click += new EventHandler(showPanel);