.net 项目总结 day02学习

功能实现

代码功能    图片截取　　返回上次访问位置  退出登录   找回密码邮件

1   图片截取,使用jquery.imgareaselect.min.js

<%@ Page Title="" Language="C#" MasterPageFile="~/Master/UserMaster.Master" AutoEventWireup="true" CodeBehind="UserCenter.aspx.cs" Inherits="Maticsoft.Web.UserInfoManager.UserCenter" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server">
<style type="text/css">
        #divCut {
            background-position: top left
        }
    </style>
    <link href="/Css/imgareaselect-default.css" rel="stylesheet" />
    <script src="/js/jquery.imgareaselect.min.js"></script>
    <script src="/SWFUpload/swfupload.js"></script>
    <script src="/SWFUpload/handlers.js"></script>
     <script type="text/javascript">
         var swfu;
         window.onload = function () {
             swfu = new SWFUpload({
                 // Backend Settings
                 upload_url: "/ashx/upload.ashx?action=up",
                 post_params: {
                     "ASPSESSID": "<%=Session.SessionID %>"
                 },

                 // File Upload Settings
                 file_size_limit: "2 MB",
                 file_types: "*.jpg;*.gif",
                 file_types_description: "JPG Images",
                 file_upload_limit: 0,    // Zero means unlimited

                 // Event Handler Settings - these functions as defined in Handlers.js
                 //  The handlers are not part of SWFUpload but are part of my website and control how
                 //  my website reacts to the SWFUpload events.
                 swfupload_preload_handler: preLoad,
                 swfupload_load_failed_handler: loadFailed,
                 file_queue_error_handler: fileQueueError,
                 file_dialog_complete_handler: fileDialogComplete,
                 upload_progress_handler: uploadProgress,
                 upload_error_handler: uploadError,
                 upload_success_handler: showImage,
                 upload_complete_handler: uploadComplete,

                 // Button settings
                 button_image_url: "/SWFUpload/images/XPButtonNoText_160x22.png",
                 button_placeholder_id: "spanButtonPlaceholder",
                 button_ 160,
                 button_height: 22,
                 button_text: '<span class="button">请选择上传图片<span class="buttonSmall">(2 MB Max)</span></span>',
                 button_text_style: '.button { font-family: Helvetica, Arial, sans-serif; font-size: 14pt; } .buttonSmall { font-size: 10pt; }',
                 button_text_top_padding: 1,
                 button_text_left_padding: 5,

                 // Flash Settings
                 flash_url: "/SWFUpload/swfupload.swf",    // Relative to this file
                 flash9_url: "/SWFUpload/swfupload_FP9.swf",    // Relative to this file

                 custom_settings: {
                     upload_target: "divFileProgressContainer"
                 },

                 // Debug Settings
                 debug: false
             });
         }
         //上传成功以后调用该方法
         function showImage(file, serverData) {
             //$("#imgSrc").attr("src", serverData);
             var data = serverData.split(':');
             if (data[0] == "ok") {
                 //建上传成功的图片作为divContent的背景.
                 //$("#divContent").css("backgroundImage", "url(" + data[1] + ")").css("width", data[2] + "px").css("height", data[3] + "px");
                 $("#selectbanner").attr("src", data[1]);//给定img的数据
                 $('#selectbanner').imgAreaSelect({
                     selectionColor: 'blue', x1: 0, y1: 0, x2: 150, y2: 100,

                     //maxWidth: 950, minWidth: 950,  minHeight: 400, maxHeight: 400,

                     selectionOpacity: 0.2, onSelectEnd: preview
                 });
                 $('#selectbanner').data('x', 0);

                 $('#selectbanner').data('y', 0);

                 $('#selectbanner').data('w',150);

                 $('#selectbanner').data('h', 100);
                 $("#imagePath").val(data[1]);//将上传成功的头像存储到隐藏域中。
             } else {
                 alert(serverData[1]);
             }
         }
         //选择结束以后调用该方法(确定出要截取头像的范围，并且通过data方法存储要截取头像范围的数据)
         function preview(img, selection) {

             $('#selectbanner').data('x', selection.x1);

             $('#selectbanner').data('y', selection.y1);

             $('#selectbanner').data('w', selection.width);

             $('#selectbanner').data('h', selection.height);

         }


         $(function () {
             //$("#divCut").resizable({
             //    containment: "parent"
             //}).draggable({ containment: "parent" });
             $("#btnPhotoCut").click(function () {
                 ////确定要截取头像的范围。
                 //var y = $("#divCut").offset().top - $("#divContent").offset().top;//计算出纵坐标.
                 //var x = $("#divCut").offset().left - $("#divContent").offset().left;
                 //var width = $("#divCut").width();
                 //var height = $("#divCut").height();
                 //var pars = {
                 //    x: x,
                 //    y: y,
                 //    width,
                 //    height: height,
                 //    action: "cut",
                 //    imagePath: $("#imagePath").val()

                 //};

                 var pars = {

                     x: $('#selectbanner').data('x'),

                     y: $('#selectbanner').data('y'),

                      $('#selectbanner').data('w'),

                     height: $('#selectbanner').data('h'),

                     imagePath: $("#imagePath").val(),
                     action: "cut",

                 };
                 //根据确定的范围进行头像的截取.
                 $.post("/ashx/upload.ashx", pars, function (data) {
                     $("#imgSrc").attr("src", data);//截取成功后的数据
                 });
             });
         });
    </script>


</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="cphContent" runat="server">

    <div id="content">
        <div id="swfu_container" style="margin: 0px 10px;">
            <div>
                <span id="spanButtonPlaceholder"></span>
            </div>
            <div id="divFileProgressContainer" style="height: 75px;"></div>
            <div id="thumbnails"></div>
           <%-- <div id="divContent" style="300px; height:300px">
                <div id="divCut" style="100px; height:100px;border:solid 1px red">

                </div>
            </div>--%>
            <img id="selectbanner"/>
            <input type="button" value="头像截取" id="btnPhotoCut" />
            <input type="hidden" id="imagePath" />
            <br />
            <img id="imgSrc" />
        </div>
        </div>
</asp:Content>

using System;
using System.Collections.Generic;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Web;

namespace Maticsoft.Web.ashx
{
    /// <summary>
    /// upload 的摘要说明
    /// </summary>
    public class upload : IHttpHandler
    {

        public void ProcessRequest(HttpContext context)
        {
            context.Response.ContentType = "text/plain";
            //context.Response.Write("Hello World");
            string action = context.Request["action"];
            if (action == "up")
            {
                fileUpload(context);//上传图片

            }
            else if (action == "cut")
            {
                cutFileImage(context);//截取图片文件
            }
            else
            {
                context.Response.Write("参数异常！1");
            }
        }
        #region 截取图片文件
       
        private void cutFileImage(HttpContext context)
        {
            int x = Convert.ToInt32(context.Request["x"]);
            int y = Convert.ToInt32(context.Request["y"]);
            int width = Convert.ToInt32(context.Request["width"]);
            int height = Convert.ToInt32(context.Request["height"]);
            string imagePath = context.Request["imagePath"];
            using (Bitmap map =  new Bitmap(width,height))
            {
                using (Graphics g = Graphics.FromImage(map))
                {
                    using (Image img = Image.FromFile(context.Request.MapPath(imagePath)))
                    {
                        //将原图的指定范围画到画布上.
                        //1:表示对哪张图片进行操作
                        //2:画多么大.
                        //3:画原图的哪块区域
                        g.DrawImage(img, new Rectangle(0, 0, width, height), new Rectangle(x, y, width, height), GraphicsUnit.Pixel);
                        string fileNewName = Guid.NewGuid().ToString();
                        string fullDir = "/UploadImage/" + fileNewName + ".jpg";
                        map.Save(context.Request.MapPath(fullDir), System.Drawing.Imaging.ImageFormat.Jpeg);//保存图片.
                        //一定要将截取后的图片路径存储到数据库中。
                        context.Response.Write(fullDir);
                    }
                }
            }
            //throw new NotImplementedException();
        }
        #endregion
        #region 上传图片
        private void fileUpload(HttpContext context)
        {
            HttpFileCollection collection = context.Request.Files;
            bool isSucess = false;
            if (collection.Count > 0)
            {
                HttpPostedFile file = context.Request.Files["Filedata"];
                if (file != null)
                {
                    string fileName = Path.GetFileName(file.FileName);
                    string fileExt = Path.GetExtension(fileName);
                    if (fileExt == ".jpg")
                    {
                        string dir = "/UploadImage/" + DateTime.Now.Year + "/" + DateTime.Now.Month + "/" + DateTime.Now.Day + "/";
                        if (!Directory.Exists(context.Request.MapPath(dir)))
                        {
                            Directory.CreateDirectory(context.Request.MapPath(dir));
                        }
                        string newfileName = Guid.NewGuid().ToString();
                        string fullDir = dir + newfileName + fileExt;
                        file.SaveAs(context.Request.MapPath(fullDir));
                        isSucess = true;
                        using (Image img = Image.FromFile(context.Request.MapPath(fullDir)))
                        {
                            context.Response.Write("ok:" + fullDir + ":" + img.Width + ":" + img.Height);
                        }
                        //file.SaveAs(context.Request.MapPath("/UploadImage/" + fileName));
                        //context.Response.Write("/UploadImage/" + fileName);
                    }
                }
            }
            if (!isSucess)
            {
                context.Response.Write("no:上传失败!!");
            }
        }
        #endregion

        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
    }
}

2   基本登陆与自动登录

3   返回上次访问位置

using Maticsoft.BLL;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace Maticsoft.Web.CheckUserState
{//使用频率较高时  其他页面直接继承checkusersession    就不需要多次书写
    public class CheckSession : System.Web.UI.Page
    {
        public void Page_Init(object sender, EventArgs e)
        {
            if (Session["userInfo"] == null)
            {
                if (Request.Cookies["cp1"] != null)
                {
                    UsersManager userManager = new UsersManager();
                    string userName = Request.Cookies["cp1"].Value;//查询是否存在此用户名
                    Model.Users userInfo = userManager.GetModel(userName);
                    if (!Common.WebCommon.CheckCookieInfo(userInfo))
                    {
                        // Response.Redirect("/Account/Login.aspx");
                        Common.WebCommon.ReturnRedirect();
                    }
                }
                else
                {
                    //Response.Redirect("/Account/Login.aspx");
                    Common.WebCommon.ReturnRedirect();
                }
            }
        }
    }
}

4    退出登录

  /// <summary>
        /// 清除session
        /// </summary>
        /// <param name="context"></param>
        public void ProcessRequest(HttpContext context)
        { 
            context.Response.ContentType = "text/plain";
            //context.Response.Write("Hello World");
            if (context.Session["userInfo"] != null)
            {
                context.Session["userInfo"] = null;
                //清除cookie中的值
                context.Response.Cookies["cp1"].Expires = DateTime.Now.AddDays(-1);
                context.Response.Cookies["cp2"].Expires = DateTime.Now.AddDays(-1);
                context.Response.Write("ok");
            }
        }

5    注册跳转

　　验证码每次点击登录时直接强制过期，应该是为了，减少服务器端压力

6    找回密码

　　采用的是数据库更新密码，邮件发送新密码，数据库更新一定放在发送邮件后，防止邮件未发送而密码更改，

 /// <summary>
        /// 发送邮件
        /// </summary>
        /// <param name="context"></param>
        public void ProcessRequest(HttpContext context)
        {
            context.Response.ContentType = "text/plain";
            //context.Response.Write("Hello World");
            string mail = context.Request["mail"];
            UsersManager userInfoManager = new UsersManager();
            if (userInfoManager.CheckUserMail(mail))//表示有这个邮箱
            {
                userInfoManager.SendUserMail(mail);
                context.Response.Write("ok");
            }
            else
            {
                context.Response.Write("no");
            }
        }

  public bool CheckUserMail(string mail)
       {
           return dal.CheckUserMail(mail) > 0;
       }

/// <summary>
       /// 发送邮件   利用数据库存储源邮件信息，并存储在缓存中
       /// </summary>
       /// <param name="mail"></param>
       public void SendUserMail(string mail)
       {
           //1：系统产生一个新的密码(一定要替换用户在数据库中的旧密码,但是发送到用户邮箱中的密码必须是明文)，发送到用户邮箱中。
           //2:发送一个连接.
           SettingsManager settingManager = new SettingsManager();
           string newPwd = Guid.NewGuid().ToString().Substring(0, 8);

           Model.Users userInfo = dal.GetUserByMail(mail);//根据邮箱找用户
           userInfo.LoginPwd = Common.WebCommon.Md5String(Common.WebCommon.Md5String(newPwd));
           //注释的是用来邮件发送的缓存用法  
                MailMessage mailMsg = new MailMessage();//两个类，别混了，要引入System.Net这个Assembly
                mailMsg.From = new MailAddress(settingManager.GetModel("系统邮件地址").Value);//源邮件地址 
               
                mailMsg.To.Add(new MailAddress(mail));//目的邮件地址。可以有多个收件人
                mailMsg.Subject = "您在xxx网站新的账户";//发送邮件的标题 
                StringBuilder sb = new StringBuilder();
                sb.Append("您在xxx网站中新的账户如下:");
                sb.Append("用户名:"+userInfo.LoginId);
                sb.Append("密码是:"+newPwd);
                mailMsg.Body = sb.ToString();//发送邮件的内容 
                mailMsg.IsBodyHtml = true;
                //指定Smtp服务地址。(根据发件人邮箱指定对应的SMTP服务器地址)
               
                //SmtpClient client = new SmtpClient("smtp.qq.com");
                SmtpClient client = new SmtpClient(settingManager.GetModel("系统邮件SMTP").Value);//smtp.163.com，smtp.qq.com
                client.Credentials = new NetworkCredential(settingManager.GetModel("系统邮件用户名").Value, settingManager.GetModel("系统邮件密码").Value);//发件人邮箱的用户名密码
                client.Send(mailMsg);
                dal.Update(userInfo);//这一项必须放在最后



          
       }

 /// <summary>
        /// 根据配置项的名称找对应配置信息
        /// </summary>
        /// <param name="name">配置项的名称(key)</param>
        /// <returns></returns>
        public Model.Settings GetModel(string name)
        {
            object obj = Common.CacheHelper.Get("setting_" + name);
            if (obj == null)
            {
                Model.Settings setting = dal.GetModel(name);
                Common.CacheHelper.Set("setting_" + name, setting);
                return setting;
            }
            else
            {
                Model.Settings setting = obj as Model.Settings;
                return setting;

            }
        }

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Web;

namespace Maticsoft.Common
{
   public class CacheHelper
    {
       /// <summary>
       /// 根据缓存的key，从缓存中取值.
       /// </summary>
       /// <param name="key"></param>
       /// <returns></returns>
       public static object Get(string key)
       {
           System.Web.Caching.Cache cache = HttpRuntime.Cache;
           return cache[key];
       }
       /// <summary>
       /// 向缓存中添加数据
       /// </summary>
       /// <param name="key"></param>
       /// <param name="value"></param>
       public static void Set(string key, object value)
       {
           System.Web.Caching.Cache cache = HttpRuntime.Cache;
           cache[key] = value;
       }

       /// <summary>
       /// 向缓存中添加数据
       /// </summary>
       /// <param name="key"></param>
       /// <param name="value"></param>
       public static void Set(string key, object value,DateTime time)
       {
           System.Web.Caching.Cache cache = HttpRuntime.Cache;
           cache.Insert(key, value, null, time, TimeSpan.Zero);
       }
         /// <summary>
       /// 移除缓存中的数据
       /// </summary>
       /// <param name="key"></param>
       /// <param name="value"></param>
       public static void Reomve(string key)
       {
           System.Web.Caching.Cache cache = HttpRuntime.Cache;
           cache.Remove(key);
       }

            
    }
}