当另一个窗体关闭时在一个窗体中执行代码[重复]

是的,你想干什么就干什么 FormClosing 但你需要 Form1 并设置值 窗体关闭 在里面 Form2 ,在 set{}

// in Form 2
private void Form2_FormClosing(object sender, FormClosingEventArgs e)
{
    Form1.IsForm2Closed = true;
}

// in Form 1
private static _isForm2Closed ;
public static bool IsForm2Closed 
{
    get
    {
        return _isForm2Closed;
    }
    set
    {
        _isForm2Closed = value;

       if(value)
       {
           // do whatever you want to execute here.
       }
    }
}