摘要： 后台代码：using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;using System.Drawing;using System.IO;using System.Text;namespace 验证码{ public partial class pic : System.Web.UI.Page { protected void Page_Load(object sender, Even 阅读全文