using?System;
using?System.Collections;
using?System.Configuration;
using?System.Data;
using?System.Web;
using?System.Web.Security;
using?System.Web.UI;
using?System.Web.UI.HtmlControls;
using?System.Web.UI.WebControls;
using?System.Web.UI.WebControls.WebParts;
using?System.Drawing;

public?partial?class?CheckCode?:?System.Web.UI.Page
{
????protected?void?Page_Load（object?sender?EventArgs?e）
????{
????????string?a?=?GenerateCheckCode（）;
????????CreateCheckCodeImage（a）;
????}

????private?string?GenerateCheckCode（）
????{
????????int?number;
????????char?code;
????????string?checkCode?=?String.Empty;

????????System.Random?random?=?new?Random（）;

????????for?（int?i?=?0;?i?????????{
????????????number?=?random.Next（）;

????????????if?（number?%?2?==?0）
????????????????code?=?（char）（‘0‘?+?（char）（number?%?10））;
????????????else
????????????????code?=?（char）（‘A‘?+?（char）（number?%?26））;

????????????checkCode?+=?code.ToString（）;
????????}
????????Session[“CheckCode“]?=?checkCode;

????????//Response.Cookies.Add（new?HttpCookie（“CheckCode“?checkCode））;

????????return?checkCode;
????}

????private?void?CreateCheckCodeImage（string?checkCode）
????{
????????if?（checkCode?==?null?||?checkCode.Trim（）?==?String.Empty）
????????????return;

????????System.Drawing.Bitmap?image?=?new?System.Drawing.Bitmap（（int）Math.Ceiling（（checkCode.Length?*?12.5））?22）;
????????Graphics?g?=?Graphics.FromImage（image）;

????????try
????????{
????????????//生成隨機生成器
????????????Random?random?=?new?Random（）;

????????????//清空圖片背景色
????????????g.Clear（Color.White）;

????????????//畫圖片的背景噪音線
????????????for?（int?i?=?0;?i?????????????{
????????????????int?x1?=?random.Next（image.Width）;
????????????????int?x2?=?random.Next（image.Width）;
????????????????int?y1?=?random.Next（image.Height）;
????????????????int?y2?=?random.Next（image.Height）;

????????????????g.DrawLine（new?Pen（Color.Silver）?x1?y1?x2?y2）;
????????????}

????????????Font?font?=?new?System.Drawing.Font（“Arial“?12?（System.Drawing.Fontstyle.Bold?|?System.Drawing.Fontstyle.Italic））;
????????????System.Drawing.Drawing2D.LinearGradientBrush?brush?=?new?System.Drawing.Drawing2D.LinearGradientBrush（new?Rectangle（0?0?image.Width?image.Height）?Color.Blue?Color.DarkRed?1.2f?true）;
????????????g.DrawString（checkCode?font?brush?2?2）;

????????????//畫圖片的前景噪音點
????????????for?（int?i?=?0;?i?????????????{
????????????????int?x?=?random.Next（image.Width）;
????????????????int?y?=?random.Next（image.Height）;

????????????????image.SetPixel（x?y?Color.FromArgb（random.Next（）））;
????????????}

????????????//畫圖片的邊框線
????????????g.DrawRectangle（new?Pen（Color.Silver）?0?0?image.Width?-?1?image.Height?-?1）;

????????????System.IO.MemoryStream?ms?=?new?System.IO.MemoryStream（）;
????????????image.Save（ms?System.Drawing.Imaging.ImageFormat.Gif）;
????????????Response.ClearContent（）;
????????????Response.ContentType

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件????1048576??2009-05-06?15:37??期中作業留言版\zhangyang_Data.MDF

?????文件????1048576??2009-05-06?15:37??期中作業留言版\zhangyang_Log.LDF

?????文件???????1010??2009-05-06?15:35??期中作業留言版\LIUYANBAN\App_Code\zyData.cs

?????文件????????103??2009-04-23?16:38??期中作業留言版\LIUYANBAN\CheckCode.aspx

?????文件???????3265??2009-04-23?16:43??期中作業留言版\LIUYANBAN\CheckCode.aspx.cs

?????文件?????196814??2009-04-24?12:14??期中作業留言版\LIUYANBAN\pic\01.jpg

?????文件??????32379??2009-04-21?16:02??期中作業留言版\LIUYANBAN\pic\1.jpg

?????文件???????8144??2008-05-08?22:01??期中作業留言版\LIUYANBAN\pic\101.gif

?????文件??????11005??2008-05-08?22:01??期中作業留言版\LIUYANBAN\pic\102.gif

?????文件???????9542??2008-05-08?22:01??期中作業留言版\LIUYANBAN\pic\103.gif

?????文件???????8447??2008-05-08?22:01??期中作業留言版\LIUYANBAN\pic\104.gif

?????文件???????7867??2008-05-08?22:01??期中作業留言版\LIUYANBAN\pic\105.gif

?????文件??????17192??2008-05-08?22:01??期中作業留言版\LIUYANBAN\pic\106.gif

?????文件???????8972??2008-05-08?22:01??期中作業留言版\LIUYANBAN\pic\107.gif

?????文件??????13196??2008-05-08?22:01??期中作業留言版\LIUYANBAN\pic\108.gif

?????文件??????13223??2008-05-08?22:01??期中作業留言版\LIUYANBAN\pic\109.gif

?????文件??????14894??2008-05-08?22:01??期中作業留言版\LIUYANBAN\pic\110.gif

?????文件???????7566??2008-05-08?22:01??期中作業留言版\LIUYANBAN\pic\111.gif

?????文件??????12031??2008-05-08?22:01??期中作業留言版\LIUYANBAN\pic\112.gif

?????文件??????15799??2008-05-08?22:01??期中作業留言版\LIUYANBAN\pic\113.gif

?????文件??????12685??2008-05-08?22:01??期中作業留言版\LIUYANBAN\pic\114.gif

?????文件???????7811??2008-05-08?22:01??期中作業留言版\LIUYANBAN\pic\115.gif

?????文件???????8541??2008-05-08?22:03??期中作業留言版\LIUYANBAN\pic\116.gif

?????文件???????8987??2008-05-08?22:03??期中作業留言版\LIUYANBAN\pic\117.gif

?????文件???????9432??2008-05-08?22:03??期中作業留言版\LIUYANBAN\pic\118.gif

?????文件???????7263??2008-05-08?22:03??期中作業留言版\LIUYANBAN\pic\119.gif

?????文件???????8999??2008-05-08?22:03??期中作業留言版\LIUYANBAN\pic\120.gif

?????文件???????7087??2008-05-08?22:03??期中作業留言版\LIUYANBAN\pic\121.gif

?????文件??????15692??2008-05-08?22:03??期中作業留言版\LIUYANBAN\pic\122.gif

?????文件???????5628??2008-05-08?22:03??期中作業留言版\LIUYANBAN\pic\123.gif

............此處省略67個文件信息