plupload的一些使用心得

最近要做一个文件上传的东西经过同事的推荐所以就选择了plupload，挺强大的由于项目框架为改动后的MVC 刚一开始破费周折不过最后总算是完成了废话不多说了粘出来代码给大家参考吧！文件包大家去官网上面下载吧。下载地址http://www.plupload.com/

引用

前台页面的代码JS

$(function () {
            // 初始化Flash上传插件
            $("#flash_uploader").pluploadQueue({
                runtimes: 'flash',    //使用Flash插件
                url: '/AJAX/uploadFiles.ashx',    //服务器端响应页面
                max_file_size: '10mb', //最大文件限制
                chunk_size: '1mb',    //一次上传数据大小
                unique_names: true,    //是否自动生成唯一名称
                filters: [{ title: "All files", extensions: "doc,docx,ppt,pptx,xls,xlsx,vsd,pot,pps,rtf,wps,et,dps,pdf,txt,epub,rar" }
],
                // 缩放图片
                resize: { width: 320, height: 240, quality: 80 },
                // SWF文件位置
                flash_swf_url: '$webpath/library/js/plupload/plupload.flash.swf',
                init: {
                    FileUploaded: function (up, file, info) {
                        //一个文件上传成功
                        var res = $("#hid_FilePath").val();
                        var newres = "";
                        newres = res + info.response;
                        $("#hid_FilePath").val(newres);
                    },
                    Error: function (up, args) {
                        //发生错误
                        if (args.file) {
                            alert('[error] File:' + args.file);
                        } else {
                            alert('[error]' + args);
                        }
                    }
                }
            });
            // 这一块主要是防止在上传未结束前表单提交，具体大家可酌情修改编写
            $('form').submit(function (e) {
                var uploader = $('#uploader').pluploadQueue(); // 取得上传队列
                if (uploader.files.length > 0) { // 就是说如果上传队列中还有文件
                    uploader.bind('StateChanged', function () {
                        if (uploader.files.length === (uploader.total.uploaded + uploader.total.failed)) {
                            $('form')[0].submit(); //表单提交
                        }
                    });
                    uploader.start();
                } else {
                    alert('队列中必须至少要有一个文件!');
                }
                return false;
            });
        });
    </script>

我用的是一般处理程序来处理上传的核心代码的uploadFiles.ashx代码

/// <summary>
        /// Json数据序列化
        /// </summary>
        /// <param name="dic"></param>
        /// <returns></returns>
        private string toJson(Dictionary<string, string> dic)
        {
            return EbookServer_Common.Public.toJson(dic);
        }
        /// <summary>
        /// Json数据反序列化
        /// </summary>
        /// <param name="jsonList"></param>
        /// <returns></returns>
        private string toJsonArray(List<string> jsonList)
        {
            return EbookServer_Common.Public.toJsonArray(jsonList);
        }
        public void UploadFile(HttpContext context)
        {
            Dictionary<string, string> _dic = new Dictionary<string, string>();
            context.Response.CacheControl = "no-cache";
            string s_rpath = FileHelper.GetUploadPath();//@"E:\My Documents\Visual Studio 2008\WebSites\SWFUpload\demos\applicationdemo.net";

            string Datedir = DateTime.Now.ToString("yy-MM-dd");
            string updir = s_rpath + "\\" + Datedir;
            string returnstr = "";
            int filesize = 0;
            List<string> _arr = new List<string>();
            if (context.Request.Files.Count > 0)
            {
                try
                {

                    for (int j = 0; j < context.Request.Files.Count; j++)
                    {
                        Dictionary<string, string> _dic_info = new Dictionary<string, string>();
                        HttpPostedFile uploadFile = context.Request.Files[j];
                        int offset = Convert.ToInt32(context.Request["chunk"]); //当前分块
                        int total = Convert.ToInt32(context.Request["chunks"]);//总的分块数量
                        string name = context.Request["name"];
                        //文件没有分块
                        if (total == 1)
                        {

                            if (uploadFile.ContentLength > 0)
                            {
                                if (!Directory.Exists(updir))
                                {
                                    Directory.CreateDirectory(updir);
                                }
                                // string fileId = DateTime.Now.ToString("yyyyMMddHHmmssfff") + uploadFile.FileName.Substring(uploadFile.FileName.LastIndexOf("."));
                                uploadFile.SaveAs(string.Format("{0}\\{1}", updir, name));
                                filesize = Convert.ToInt32(uploadFile.ContentLength / 1024);
                            }
                        }
                        else
                        {
                            //文件分成多块上传
                            string fullname = WriteTempFile(uploadFile, offset, name);
                            if (total - offset == 1)
                            {
                                //如果是最后一个分块文件，则把文件从临时文件夹中移到上传文件夹中
                                System.IO.FileInfo fi = new System.IO.FileInfo(fullname);
                                if (!Directory.Exists(updir))
                                {
                                    Directory.CreateDirectory(updir);
                                }
                                string oldFullName = string.Format(@"{0}\\{1}", updir, name);
                                FileInfo oldFi = new FileInfo(oldFullName);
                                if (oldFi.Exists)
                                {
                                    //文件名存在则删除旧文件
                                    oldFi.Delete();
                                }
                                fi.MoveTo(oldFullName);
                                filesize = Convert.ToInt32(fi.Length / 1024);
                            }
                        }

                        string filePath = string.Format(@"\\upload\\{0}\\{1}", Datedir, name);
                        string fileName = name;
                        string fileSize = filesize.ToString();
                        returnstr = returnstr + fileName + "||" + filePath + "||" + fileSize + ",";
                    }
                    context.Response.ContentEncoding = System.Text.Encoding.GetEncoding("utf-8");
                    context.Response.Charset = "utf-8";
                    context.Response.AddHeader("content-type", "application/x-javascript");
                    context.Response.Write(returnstr.ToString());
                }
                catch (Exception ex)
                {
                    context.Response.Write("Message" + ex.ToString());
                }
            }
        }
        /// <summary>
        /// 保存临时文件
        /// </summary>
        /// <param name="uploadFile"></param>
        /// <param name="chunk"></param>
        /// <returns></returns>
        private string WriteTempFile(HttpPostedFile uploadFile, int chunk, string name)
        {
            // string fileId = DateTime.Now.ToString("yyyyMMddHHmmssfff") + uploadFile.FileName.Substring(uploadFile.FileName.LastIndexOf("."));
            string tempDir = FileHelper.GetTempPath();
            if (!Directory.Exists(tempDir))
            {
                Directory.CreateDirectory(tempDir);
            }
            string fullName = string.Format("{0}\\{1}.part", tempDir, name);
            if (chunk == 0)
            {
                //如果是第一个分块，则直接保存
                uploadFile.SaveAs(fullName);
            }
            else
            {
                //如果是其他分块文件，则原来的分块文件，读取流，然后文件最后写入相应的字节
                FileStream fs = new FileStream(fullName, FileMode.Append);
                if (uploadFile.ContentLength > 0)
                {
                    int FileLen = uploadFile.ContentLength;
                    byte[] input = new byte[FileLen];

                    // Initialize the stream.
                    System.IO.Stream MyStream = uploadFile.InputStream;

                    // Read the file into the byte array.
                    MyStream.Read(input, 0, FileLen);

                    fs.Write(input, 0, FileLen);
                    fs.Close();
                }
            }
            return fullName;
        }

还有一个文件处理类引用来的FileHelper.cs

    public FileHelper()
        {
            //
            //TODO: 在此处添加构造函数逻辑
            //
        }
        /// <summary>
        /// 获取上传目录
        /// </summary>
        /// <returns></returns>
        public static string GetUploadPath()
        {
            string path = HttpContext.Current.Server.MapPath("~/");
            string dirname = GetDirName();
            string uploadDir = path + "\\" + dirname;
            CreateDir(uploadDir);
            return uploadDir;
        }
        /// <summary>
        /// 获取临时目录
        /// </summary>
        /// <returns></returns>
        public static string GetTempPath()
        {
            string path = HttpContext.Current.Server.MapPath("~/");
            string dirname = GetTempDirName();
            string uploadDir = path + "\\" + dirname;
            CreateDir(uploadDir);
            return uploadDir;
        }
        private static string GetDirName()
        {
            return System.Configuration.ConfigurationManager.AppSettings["uploaddir"];
        }
        private static string GetTempDirName()
        {
            return System.Configuration.ConfigurationManager.AppSettings["tempdir"];
        }
        public static void CreateDir(string path)
        {
            if (!System.IO.Directory.Exists(path))
            {
                System.IO.Directory.CreateDirectory(path);
            }
        }

到此就完成了。。。由于时间紧迫就不废话了从中引用了别人的代码希望能帮到大家谢谢！

来源：https://www.cnblogs.com/weiying/p/weiying_2014_10_10.html

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