1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Web; 5  6 namespace Blog.UI 7 { 8     using System.Drawing; 9     using Blog.Common;10     /// <summary>11     /// Vcode 的摘要说明12     /// </summary>13     public class Vcode : IHttpHandler,System.Web.SessionState.IRequiresSessionState14     {15         Random r = new Random();16         public void ProcessRequest(HttpContext context)17         {18             //准备一张画布19             using (Image img = new Bitmap(60, 25))20             {21                 22                 //准备一个画家23                 Graphics g = Graphics.FromImage(img);24                 //背景画白25                 g.Clear(Color.White);26                 //画边框27                 g.DrawRectangle(Pens.Red, 0, 0, img.Width - 1, img.Height - 1);28                 //画噪点线29                 DrawPoints(g, img, 10);30                 //得到验证码字符串31                 string vcodestr = Getstring(1);32                 //画字符串33                 g.DrawString(vcodestr, new Font("微软雅黑", 16, FontStyle.Italic | FontStyle.Strikeout), Brushes.Blue, 0, 0);34                 DrawPoints(g, img, 10);35                 //将图片以jpg格式显示在outputstream流36                 img.Save(context.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg);37                 //存进session38                 context.Session[CommonHelper.Vcode] = vcodestr;39             }40         }41         void DrawPoints(Graphics g,Image img,int n)42         {43             for (int i = 0; i < n; i++)44             {45                 int x = r.Next(0, img.Width);46                 int y = r.Next(0, img.Height);47                 g.DrawLine(Pens.Blue, x, y, x + r.Next(2, img.Width), y + r.Next(2, img.Width));48             }49             50         }51         string Getstring(int n)52         {53             string s = string.Empty;54             55             char[] c = new char[] { ‘1‘, ‘2‘, ‘3‘, ‘4‘, ‘5‘, ‘6‘, ‘7‘, ‘8‘, ‘9‘, ‘a‘, ‘b‘, ‘c‘,‘d‘ };56             for (int i = 0; i < n; i++)57             {58                s+=c[ r.Next(c.Length)];59             }60             return s;61         }62         public bool IsReusable63         {64             get65             {66                 return false;67             }68         }69     }70 }

<%@ Page Language="C#" MasterPageFile="~/Master/Site1.Master" AutoEventWireup="true" CodeBehind="PhotoList.aspx.cs" Inherits="Blog.UI.Photo.PhotoList" %><%@ Register Assembly="AspNetPager" Namespace="Wuqi.Webdiyer" TagPrefix="bigying" %><asp:Content ID="heard" ContentPlaceHolderID="head" runat="server">    <style type="text/css">        .contentdiv        {            height: 200px;            width: 130px;            border: 1px solid blue;            margin: 4px 2px;            display: inline-block;        }            .contentdiv ul            {                text-align: center;            }        .pictureimg        {            width: 130px;            height: 150px;        }        #pagingdiv        {            width: 400px;            border: 1px solid red;            position: relative;            left: 320px;            top: 250px;        }        #uploaddiv        {            width:200px;            height:100px;            border:1px solid red;            margin:50px auto;            display:none;        }    </style>    <script src="/JS/jquery-1.9.1.min.js"></script>    <script src="/JS/AjaxHelper.js"></script>   <script type="text/javascript">       //var pid;       //var paid;       function Delete(id)       {           alert(id);       }       function Showupload(pid,paid)       {           $("#uploaddiv").show();           $("#pid").val(pid);           $("#paid").val(paid);       }       function Cancleupload() {           $("#uploaddiv").hide();                  }       function Uploadphotoajax()       {           //手写ajax复习           //var xhr = new XMLHttpRequest();           //xhr.open("post", "/Photo/upload.ashx", true);           //xhr.setRequestHeader("content-type","multipart/form-data");           //xhr.onreadystatechange = function () {           //    if (xhr.status == 200 && xhr.readyState == 4)           //    {           //        alert(xhr.responseText);           //    }           //}           //xhr.send($("#f1").serialize());           //AjaxHelper.prcessPost("/Photo/upload.ashx", $("#f1").serialize(), function (ajaxobj) {           //    alert(ajaxobj);           //});           $("#uploadLog").html("上传中...");           $("#f1").submit();       }       function uploadSuccess(msg)       {           if (msg.split(‘|‘).length > 1) {               $("#imgShow").attr("src", msg.split(‘|‘)[1]);               $("#uploadLog").html($("#uploadLog").html()+"<br/>"+msg.split(‘|‘)[0]);           }           else {               alert(msg);           }       }   </script></asp:Content><asp:Content ID="content" ContentPlaceHolderID="ContentPlaceHolder01" runat="server">    <form runat="server">    <asp:Repeater ID="Repeater1" runat="server" OnItemCommand="Repeater1_ItemCommand">        <ItemTemplate>            <div class="contentdiv">            <ul>                <li class="pictureli">                    <img class="pictureimg" src="/Upload/Images/<%#Eval("Psrc")%>" /></li>                <li><%#Eval("Ptitle") %></li>                <li><asp:LinkButton ID="LinkButton1" runat="server" CommandArgument=‘<%#Eval("Pid") %>‘ CommandName="btnDel">删除</asp:LinkButton>                    <a href="javascript:void(0)" onclick="Edit(<%#Eval("Pid")%>)">修改</a>                    <a href="javascript:void(0)" onclick=‘Showupload(<%#Eval("PId")%>,<%#Eval("PAlbum") %>)‘>上传</a>                </li>            </ul>        </div>                   </ItemTemplate>    </asp:Repeater>       <div id="pagingdiv"> <bigying:AspNetPager ID="pager"  runat="server" AlwaysShow="true" FirstPageText="首页" LastPageText="尾页" NextPageText="后页" PageIndexBoxType="TextBox" PrevPageText="前页" ShowPageIndexBox="Always" SubmitButtonText="Go" TextAfterPageIndexBox="页" TextBeforePageIndexBox="转到" PageSize="5" OnPageChanged="pager_PageChanged"></bigying:AspNetPager>        </div> </form>      <div id="uploaddiv">                <%-- 这里用一个隐藏的iframe，将form的target指向iframe，而该iframe是隐藏的，从而达到无刷新上传，ajax一般操作字符串 --%>        <form method="post" id="f1" enctype="multipart/form-data" action="upload.ashx" target="frame1">          <%-- 隐藏控件保存paid和pid传递值 --%>             <input type="hidden" id="paid" name="paid" />            <input type="hidden" id="pid" name="pid" />             <table >                <tr>                    <td><label id="uploadLog"></label></td>                    <td><img width="40px" src="" id="imgShow" alt="缩略图" /></td>                </tr>                <tr>                    <td colspan="2">                        <input type="file" name="filepath" multiple="multiple" id="fileajax" /></td>                                    </tr>                <tr>                    <td>                        <input type="button" value="上传" onclick="Uploadphotoajax()" /></td>                    <td>                        <input type="button" value="取消" onclick="Cancleupload()" /></td>                </tr>            </table>        </form>        <iframe style="display:none" name="frame1" id="frame1"></iframe>           </div></asp:Content>

using System;using System.Collections.Generic;using System.Linq;using System.Web;namespace Blog.UI.Photo{    using Blog.BLL;    using Blog.Model;    using Blog.Common;    using System.Drawing;    /// <summary>    /// upload 的摘要说明    /// </summary>    public class upload : IHttpHandler    {        public void ProcessRequest(HttpContext context)        {            if (context.Request.HttpMethod.ToLower() == "post")            {                Uploadphoto(context);            }        }        private static void Uploadphoto(HttpContext context)        {            string paid = context.Request.Form["paid"];            string pid = context.Request.Form["pid"];            //得到上传来的文件集合判断集合长度，遍历集合元素因为可能是多文件上传            HttpFileCollection myfilelist = context.Request.Files;            if (myfilelist.Count > 0)            {                for (int i = 0; i < myfilelist.Count; i++)                {                    //判断是否为空文件，并且要求为图片文件                    if (myfilelist[i].ContentLength > 3 && myfilelist[i].ContentType.StartsWith("image/"))                    {                        //旧名字到生成新名字随机字符串                        string oldname = myfilelist[i].FileName;                        string suffixname = System.IO.Path.GetExtension(oldname);                        string newname = Guid.NewGuid() + suffixname;                        string path = "/Upload/Images/" + newname;                        //把集合中图片放进2进制流，把这个流创建一个img                        using (Image img = Image.FromStream(myfilelist[i].InputStream))                        {                            img.Save(context.Server.MapPath(path));                            //img.Save(context.Response.OutputStream, img.RawFormat);                        }                        BlogPhotoBLL bpBLL = new BlogPhotoBLL();                        BlogPhoto model = bpBLL.GetModel(int.Parse(pid));                        model.PSrc = newname;                        if (bpBLL.Update(model))                        {                            context.Response.Write("<script>window.parent.uploadSuccess(‘" + oldname + "上传成功|" + path + "‘);window.parent.location=‘/Photo/PhotoList.aspx?paid="+paid+"‘;</script>");                            context.Response.End();                        }                        else                        {                            context.Response.Write("<script>window.parent.uploadSuccess(‘" + oldname + "上传不成功|" + path + "‘);</script>");                        }                    }                }            }        }        public bool IsReusable        {            get            {                return false;            }        }    }}