使用PageFactory.InitElements(_driver, this);在您的基页类的构造函数上:

Use PageFactory.InitElements(_driver, this); on the constructor of your base page class:

public class Page
{
    public IWebDriver _driver;

    public Page(IWebDriver driver)
    {
        this._driver = driver;
        PageFactory.InitElements(_driver, this);
    }
}

请参阅 PageFactory 文档