asp.net+jquery 文件上传代码

asp教程.net+jquery 文件上传代码
<%@ page language="c#" contenttype="text/html" responseencoding="gb2312" %>

asp.net教程 c代码

上传文件 方法
    ///
    ///
    ///
    public string uploadfile(string filenamepath)
    {
        //system.threading.thread.sleep(10000);
        //system.net.mime.mediatypenames.application.doevents();
        return uploadfile(filenamepath, "upload/orgimg/");
    }

    ///

    /// 上传文件 方法
    ///

    ///
    ///
    /// 返回上传处理结果   格式说明： 0|file.jpg|msg   成功状态|文件名|消息   
    public string uploadfile(string filenamepath, string tofilepath)
    {
        try
        {
            //获取要保存的文件信息
            fileinfo file = new fileinfo(filenamepath);
            //获得文件扩展名
            string filenameext = file.extension;

            //验证合法的文件
            if (checkfileext(filenameext))
            {
                //生成将要保存的随机文件名
                string filename = getfilename() + filenameext;
                //检查保存的路径 是否有/结尾
                if (tofilepath.endswith("/") == false) tofilepath = tofilepath + "/";
                //if (smallpath.endswith("/") == false) tofilepath = tofilepath + "/";
                //if (waterpath.endswith("/") == false) tofilepath = tofilepath + "/";

                //按日期归类保存
                string datepath = datetime.now.tostring("yyyymm") + "/" + datetime.now.tostring("dd") + "/";
                if (true)
                {
                    tofilepath += datepath;//原图
                    //  smallpath += datepath;//缩略图
                    // waterpath += datepath;//水印图

                }
                //获得要保存的文件路径     --upload/orgimg/2010/07/02/asdafsaf.jpg
                string serverfilename = tofilepath + filename;
                //获得要保存的缩略图文件路径
                // string smallfilename = smallpath + filename;
                //获得要保存的水印图文件路径
                // string waterfilename = waterpath + filename;

                //物理完整路径           --服务器上路径
                string tofilefullpath = httpcontext.current.server.mappath(tofilepath);
                //缩略图物理完整路径
                // string tosmallfullpath = httpcontext.current.server.mappath(smallpath);
                //水印图物理完整路径
                // string toswaterfullpath = httpcontext.current.server.mappath(waterpath);

                //检查是否有该路径  没有就创建
                if (!directory.exists(tofilefullpath))
                {
                    directory.createdirectory(tofilefullpath);
                }

                //检查缩略图是否有该路径  没有就创建
                //if (!directory.exists(tosmallfullpath))
                //{
                //    directory.createdirectory(tosmallfullpath);
                //}

                ////检查水印图是否有该路径  没有就创建
                //if (!directory.exists(toswaterfullpath))
                //{
                //    directory.createdirectory(toswaterfullpath);
                //}

                //将要保存的完整文件名         --绝对路劲      
                string tofile = tofilefullpath + filename;
                //将要保存的缩略图完整文件名
                //string tosmallfile = tosmallfullpath + filename;
                ////将要保存的水印图完整文件名
                //string towaterfile = toswaterfullpath + filename;

                ///创建webclient实例      
                webclient mywebclient = new webclient();
                //设定windows网络安全认证   方法1
                mywebclient.credentials = credentialcache.defaultcredentials;
                ////设定windows网络安全认证   方法2
                //networkcredential cred = new networkcredential("username", "userpwd");
                //credentialcache cache = new credentialcache();
                //cache.add(new uri("uploadpath"), "basic", cred);
                //mywebclient.credentials = cache;
               
                //httpfilecollection files = httpcontext.current.request.files;
                //for (int ifile = 0; ifile < files.count; ifile++)
                //{
                //    httppostedfile postedfile = files[ifile];
                //    postedfile.saveas(tofile);
                   
                //}
                // 可根据扩展名字的不同保存到不同的文件夹
              
               
                //要上传的文件      
                filestream fs = new filestream(filenamepath, filemode.open, fileaccess.read);
                //filestream fs = openfile();      
                binaryreader r = new binaryreader(fs);
                //使用uploadfile方法可以用下面的格式      
                //mywebclient.uploadfile(tofile, "put",filenamepath);      
                byte[] postarray = r.readbytes((int)fs.length);
                stream poststream = mywebclient.openwrite(tofile, "put");
                if (poststream.canwrite)
                {
                    poststream.write(postarray, 0, postarray.length);
                }
                else
                {
                    return "0|" + serverfilename + "|" + "文件目前不可写";
                }

                poststream.close();
               // makethumbnail(tofile, tosmallfile, 80, 80, "cut");
              //  addwater(tofile, towaterfile);
                return "1|" + serverfilename + "|" + "文件上传成功|" + serverfilename;
            }
            else
            {
                return "0|errorfile|" + "文件格式非法";
            }
        }
        catch (exception e)
        {
            return "0|errorfile|" + "文件上传失败,错误原因：" + e.message;
        }
    }