Action 操作

// 打开Folder操作
            var openFolderTableElement =
               driver.FindElement(
               By.CssSelector("table[data-name=‘图片‘]"));

            var mouseOverAction = new OpenQA.Selenium.Interactions.Actions(driver);
            mouseOverAction.MoveToElement(openFolderTableElement);
            //notice： Actions必须要执行perform
            mouseOverAction.Perform();
            openFolderTableElement.FindElement(By.CssSelector("div.menuBtn a.option_Open")).Click();