[轉貼]檢查子視窗是否開啟

http://www.cnblogs.com/scottckt/archive/2010/01/20/1652485.html
/// 

        /// 检测窗口是否开启
        /// 

        /// 要检测的窗口类名
        /// 返回是否打开,是为打开，并激活被打开的窗口，否未打开
        private bool CheckFormIsOpen(string sFromClassName)
        {
            foreach (Form childrenForm in this.MdiChildren)
            {
                //检测是不是当前子窗体名称
                if (childrenForm.Name == sFromClassName)
                {
                    //是的话就是把他显示
                    childrenForm.Visible = true;
                    //并激活该窗体
                    childrenForm.Activate();
                    return true;
                }
            }
            return false;
        }