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

public?partial?class?CheckCode?:?System.Web.UI.Page
{
????protected?void?Page_Load（object?sender?EventArgs?e）
????{
????????this.createCheckCodeImage（generateCheckCode（））;
????}

????private?string?generateCheckCode（）
????{
????????int?number;
????????char?code;
????????string?checkCode?=?string.Empty;
????????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;
????????}
????????Session[“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?=?“image/Gif“;
????????????Response.BinaryWrite（ms.ToArra

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

?????文件???????4667??2008-12-24?20:02??MyWebSite\App_Code\DataOperate.cs

?????文件????????611??2010-01-07?00:34??MyWebSite\App_Code\Name.cs

?????文件????????889??2010-01-07?00:30??MyWebSite\App_Code\Student.cs

?????文件????2293760??2009-12-16?23:17??MyWebSite\App_Data\aspnetdb.mdf

?????文件?????573440??2009-12-16?23:17??MyWebSite\App_Data\aspnetdb_Log.LDF

?????文件????????447??2008-12-23?10:28??MyWebSite\CheckCode.aspx

?????文件???????3204??2008-12-23?11:00??MyWebSite\CheckCode.aspx.cs

?????文件????????650??2008-12-24?10:23??MyWebSite\Error.aspx

?????文件????????458??2008-12-23?17:19??MyWebSite\Error.aspx.cs

?????文件???????4921??2008-12-24?19:31??MyWebSite\Login.aspx

?????文件???????2939??2008-12-24?11:18??MyWebSite\Login.aspx.cs

?????文件????????449??2008-12-23?15:32??MyWebSite\Manager.aspx

?????文件????????408??2008-12-23?14:53??MyWebSite\Manager.aspx.cs

?????文件???????1578??2010-02-06?20:48??MyWebSite\MyWebSite.sln

????..A..H.?????10752??2010-02-06?20:49??MyWebSite\MyWebSite.suo

?????文件???????8717??2008-12-24?10:29??MyWebSite\Region.aspx

?????文件???????3741??2008-12-24?20:00??MyWebSite\Region.aspx.cs

?????文件???????1778??2009-12-10?22:19??MyWebSite\Web.config

?????目錄??????????0??2010-01-07?00:34??MyWebSite\App_Code

?????目錄??????????0??2008-12-25?14:43??MyWebSite\App_Data

?????目錄??????????0??2010-02-06?20:48??MyWebSite

-----------?---------??----------?-----??----

??????????????2913409????????????????????21