利用一般處理常式處理頭像的瀏覽和更新

<div id="localImag" style="width: 328px; float: left; height: 113px;">                            <img id="preview" src="SearchCompanyPhoto.ashx" width="140" height="150" />                        </div>

   

   一般處理常式

using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Text;using BLL;using System.Web.SessionState;//引入讀寫操作using System.IO;namespace GoodCommunitySystem{    /// <summary>    /// SearchCompanyPhoto 的摘要說明    /// </summary>    public class SearchCompanyPhoto : IHttpHandler, IReadOnlySessionState     {        public void ProcessRequest(HttpContext context)        {            //當session有值的時候才能夠上傳頭像            if (context.Session["UserName"] != null){                companyBLL companybll = new companyBLL();                Entity.companyEntity encompanyInfo = new Entity.companyEntity();                           StringBuilder strWhere = new StringBuilder();                //拿到session中存在的使用者id值                string userID = context.Session["UserID"].ToString();                 string userName=context.Session["UserName"].ToString();                encompanyInfo = companybll.GetEntity(userID);                //擷取頭像地址                string HeadImg = encompanyInfo.HeadImg;                //把頭像地址轉換為絕地地址                string img = context.Server.MapPath(HeadImg);                // 以二進位方式讀檔案                  FileStream aFile = new FileStream(img, FileMode.OpenOrCreate, FileAccess.ReadWrite);                // 建立一個位元據流讀入器，和開啟的檔案關聯                  BinaryReader brMyfile = new BinaryReader(aFile);                // 把檔案指標重新置放到檔案的開始                  brMyfile.BaseStream.Seek(0, SeekOrigin.Begin);                //擷取照片的位元組數組                  byte[] photo = brMyfile.ReadBytes(Convert.ToInt32(aFile.Length.ToString()));                // 關閉以上new的各個對象                  brMyfile.Close();                context.Response.BinaryWrite(photo);            }            else            {                return;            }        }        public bool IsReusable        {            get            {                return false;            }        }    }}

  

HTML

<asp:FileUpload ID="FileUpload1" runat="server" onchange="javascript:setImagePreview(this,localImag,preview);" style="width: 245px; margin-left: -125px; "/><input id="Button1" type="button" onclick="SavePhoto()" value="確認上傳頭像" style="margin-left: 200px;"/>

     JS

        function SavePhoto() {            document.getElementById("test").value = "SavePhoto";//設定表示為後台調不同方法資料            var form = document.forms["TabData"];            form.action = "EditCompanyInfo.aspx";            form.method = "POST";            form.submit();        }

   

using BLL;using Entity;using System;using System.Collections.Generic;using System.IO;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;namespace GoodCommunitySystem{    public partial class EditCompanyInfomation : System.Web.UI.Page    {        protected void Page_Load(object sender, EventArgs e)        {            var test = Request.Form["test"];            //當session中不存在值，頁面重新導向到首頁            if (Session["UserName"] == null)            {                Response.Redirect("default.aspx");            }            else            {                                if (test == "SavePhoto")                {                        //上傳頭像                        UpdatePhoto();                }                            }        }        companyBLL companybll = new companyBLL();        companyEntity encompany = new companyEntity();        public void UpdatePhoto()        {            if (Session["UserName"] == null)            {                Page.ClientScript.RegisterStartupScript(Page.GetType(), "message", "<script language='javascript' defer>alert('您尚未登入，請登入！');</script>");                //Response.Write("<script language='javascript'>alert('請重新登入！');</script>");                return;            }            if (this.FileUpload1.FileContent.Length <= 0)            {                Page.ClientScript.RegisterStartupScript(Page.GetType(), "message", "<script language='javascript' defer>alert('請您重新上傳頭像，謝謝！');</script>");                return;            }            if (this.FileUpload1.FileContent.Length >= 200000)            {                Page.ClientScript.RegisterStartupScript(Page.GetType(), "message", "<script language='javascript' defer>alert('照片不能超過200KB！');</script>");                return;            }            String fullfilename = this.FileUpload1.PostedFile.FileName;    //擷取圖片的絕對路徑            String filename = fullfilename.Substring(fullfilename.LastIndexOf("\\") + 1);//擷取圖片的名稱            String type = filename.Substring(filename.LastIndexOf(".") + 1).ToLower();            //擷取圖片的格式（類型）            String Rename = Session["UserName"] + "_" + DateTime.Now.ToString("yyyyMMddHHmmss");     //使用者名稱+時間命名，避免上傳圖片命名重複            string varToDirectory = Request.PhysicalApplicationPath + "touxiang";  //專門存放使用者相簿的檔案            //判斷檔案是否存在，不存在則建立該檔案            if (!Directory.Exists(varToDirectory))            {                Directory.CreateDirectory(varToDirectory);            }            if (type == "jpg" || type == "png" || type == "jpeg" || type == "gif")            {                companyEntity enCompanyInfo = new companyEntity();                enCompanyInfo.UserID = Session["UserID"].ToString();                enCompanyInfo.HeadImg = "touxiang/" + Rename + "." + type;  //資料庫中中圖片的路徑                //圖片首先上傳至目錄下                FileUpload1.SaveAs(Server.MapPath("touxiang") + "/" + Rename + "." + type);//將圖片以相對路徑儲存，並以目前時間命名                //添加記錄成功後                if (companybll.UpdateHeadImg(enCompanyInfo))                {                    Page.ClientScript.RegisterStartupScript(Page.GetType(), "message", "<script language='javascript' defer>alert('上傳照片成功');</script>");                    DataListBind();                }                else                {                    //Page.ClientScript.RegisterStartupScript(Page.GetType(), "message", "<script language='javascript' defer>alert('刪除照片失敗，請重新上傳！');</script>");                    return;                    //Response.Write("<script language='javascript'>alert('上傳照片失敗，請重新上傳！');</script>");                }            }            else            {                Page.ClientScript.RegisterStartupScript(Page.GetType(), "message", "<script language='javascript' defer>alert('您選擇的照片格式有誤，請重新選擇！');</script>");                //Response.Write("<script language='javascript'>alert('您選擇的照片有誤，請重新選擇！');</script>");            }        }        /// <summary>        /// 綁定資料        /// </summary>        public void DataListBind()        {            string UserID = Session["UserID"].ToString();            encompany = companybll.GetEntity(UserID);        }    }}