面试题 ASP.NET给所有文本控制赋值

        foreach (Control c in Page.Controls)
        {
            if (c is HtmlForm)
            {
                foreach (Control cc in c.Controls)
                {
                    if (cc is TextBox)
                    {
                        ((TextBox)cc).Text = "ab";
                    }
                }
            }
        }

此代码在VS2005中测试通过