急！ WebClient上传图片总是打不开

沙伽more 2014-03-25 03:35:28

A项目一般处理程序上传代码：

 MemoryStream ms;

        public void ProcessRequest(HttpContext context)

        {

            string _filedir = context.Server.MapPath(@"/Styles/images/");

            try

            {

                string result = "3";

                int cout = context.Request.Files.Count;

                if (cout > 0)

                {

                    HttpPostedFile hpf = context.Request.Files[0];

                    if (hpf != null)

                    {

                        string fileExt = Path.GetExtension(hpf.FileName).ToLower();

                        //只能上传文件，过滤不可上传的文件类型  

                        string fileFilt = ".gif|.jpg|.php|.jsp|.jpeg|.png|......";

                        if (fileFilt.IndexOf(fileExt) <= -1)

                        {

                            result= "1";

                        }

                        int length = hpf.ContentLength; //判断文件大小 

                        if (length > 204800)

                        {

                            result= "2";

                        }

                        byte[] bt = new byte[length];//获取文件的Byte[]

                        ms = new MemoryStream(bt);//用Byte[]，实例化ms



                        UriBuilder url = new UriBuilder("http://192.168.20.162:8030/temp_1/ashx/UploadHandler.ashx");//上传路径

                        url.Query = string.Format("filename={0}", Path.GetFileName(hpf.FileName));//上传url参数

                        WebClient wc = new WebClient();

                        wc.OpenWriteCompleted += new OpenWriteCompletedEventHandler(wc_OpenWriteCompleted);//委托异步上传事件

                        wc.OpenWriteAsync(url.Uri);//开始异步上传

                        context.Response.Write(hpf.FileName);

                    }

                }

                context.Response.Write(result);

            }

            catch

            {

                context.Response.Write("3");//3文件上传失败

            }

        }

        protected void wc_OpenWriteCompleted(object sender, OpenWriteCompletedEventArgs e)

        {

            int bufSize = 10;

            int byteGet = 0;

            byte[] buf = new byte[bufSize];

            while ((byteGet = ms.Read(buf, 0, bufSize)) > 0)//循环读取,上传

            {

                e.Result.Write(buf, 0, byteGet);//注意这里

            }

            e.Result.Close();//关闭

            ms.Close();

        }

B项目接收代码：

 public void ProcessRequest(HttpContext context)

        {

            context.Response.ContentType = "text/plain";

            string filename = context.Request.QueryString["filename"].ToString();

            using (FileStream inputStram = File.Create(context.Server.MapPath("~/img/") + filename))

            {

                SaveFile(context.Request.InputStream, inputStram);

            }

        }



        protected void SaveFile(Stream stream, FileStream inputStream)

        {

            int bufSize = 1024;

            int byteGet = 0;

            byte[] buf = new byte[bufSize];

            while ((byteGet = stream.Read(buf, 0, bufSize)) > 0)

            {

                inputStream.Write(buf, 0, byteGet);

            }

        }

问题：我上传图片是上传到了B项目中，但是图片好像是损坏了，打不开

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Jolly丶 2014-08-23

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   protected void wc_OpenWriteCompleted(object sender, OpenWriteCompletedEventArgs e)
        {
                int bufSize = 10;
                int byteGet = 0;
                byte[] buf = new byte[bufSize];
                while ((byteGet = ms.Read(buf, 0, bufSize)) > 0)//循环读取,上传
                {
                    e.Result.Write(buf, 0, byteGet);//注意这里
                     uploadInfo.UploadedLength += byteGet;
                }
                //   让父页面知道已经处理上传完毕
               
            
                e.Result.Close();//关闭
                ms.Close();
       
        }

Jolly丶 2014-08-23

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   // 读取要上传的文件
                        FileStream fs = new FileStream(this.fileUpload.PostedFile.FileName, FileMode.Open, FileAccess.Read);
                        ms = new BinaryReader(fs);

                        string newFile = DateTime.Now.Ticks.ToString();
                        string exit = this.fileUpload.FileName.Substring(this.fileUpload.FileName.IndexOf('.'));
                        newFile = newFile + exit;
                        UriBuilder url = new UriBuilder("http://localhost:4256/UploadFileHander.ashx");//上传路径
                        url.Query = string.Format("filename={0}", newFile);//上传url参数
                        uploadInfo.ContentLength = this.fileUpload.PostedFile.ContentLength;
                        uploadInfo.FileName = newFile;
                        uploadInfo.UploadedLength = 0;
                        //文件存在 初始化...
                        uploadInfo.IsReady = true;
                        
                        WebClient wc = new WebClient();
                        wc.Credentials = CredentialCache.DefaultCredentials;
                        wc.OpenWriteCompleted += new OpenWriteCompletedEventHandler(wc_OpenWriteCompleted);//委托异步上传事件
                        wc.OpenWriteAsync(url.Uri);//开始异步上传

                        const string js = "window.parent.onComplete('success', '{0} 已成功上传,重命名为：{1}：文件大小：{2}');";
                        ScriptManager.RegisterStartupScript(this, typeof(upload_aspx), "progress", string.Format(js, Path.GetFileName(this.fileUpload.FileName), DateTime.Now.ToString("yyyy-MM") + "/" + DateTime.Now.Day + "/" + newFile, uploadInfo.ContentLength), true);

Jolly丶 2014-08-23