web上传下载文件

Posted 2021-11-29 qiu18359243869

WebService代码：

///     /// 上传文件     ///     /// 文件的byte[]     /// 上传文件的路径     /// 上传文件名字     ///     [WebMethod]     public bool UploadFile(byte[] fs, string path, string fileName)     {         bool flag = false;         try         {             //获取上传案例图片路径             path = Server.MapPath(path);             if (!Directory.Exists(path))             {                 Directory.CreateDirectory(path);             }             //定义并实例化一个内存流，以存放提交上来的字节数组。             MemoryStream m = new MemoryStream(fs);             //定义实际文件对象，保存上载的文件。             FileStream f = new FileStream(path + "\" + fileName, FileMode.Create);             //把内内存里的数据写入物理文件             m.WriteTo(f);             m.Close();             f.Close();             f = null;             m = null;             flag = true;         }         catch (Exception ex)         {             flag = false;         }         return flag;     }

    [WebMethod(Description = "下载服务器站点文件，传递文件相对路径")]     public byte[] DownloadFile(string strFilePath, string path)     {         FileStream fs = null;         string CurrentUploadFolderPath = HttpContext.Current.Server.MapPath(path);

        string CurrentUploadFilePath = CurrentUploadFolderPath + "\" + strFilePath;         if (File.Exists(CurrentUploadFilePath))         {             try             {                 ///打开现有文件以进行读取。                 fs = File.OpenRead(CurrentUploadFilePath);                 int b1;                 System.IO.MemoryStream tempStream = new System.IO.MemoryStream();                 while ((b1 = fs.ReadByte()) != -1)                 {                     tempStream.WriteByte(((byte)b1));                 }                 return tempStream.ToArray();             }             catch (Exception ex)             {                 return new byte[0];             }             finally             {                 fs.Close();             }         }         else         {             return new byte[0];         }

客户端代码：

 ///         /// 上传图片附件         ///         ///         private bool UploadImage()         {             bool flag = true;             string path = @"C:\Documents and Settings\Administrator\My Documents\My Pictures\10121312156cf4a761c504fe69.jpg";//本地路径             byte[] bytes = GetBytesByPath(path);//获取文件byte[]             string uploadPath = "image";//上传服务器文件夹路径             string fileName = "img18.jpg";//文件名称             try             {                 localhost.Service s = new WindowsFormsApplication1.localhost.Service();                 if (s.UploadFile(bytes, uploadPath, fileName)) { flag = true; }                 else { flag = false; }             }             catch             {                 flag = false;             }             return flag;         }         ///         /// 根据文件的路径获取图片的byte[]         ///         ///         ///         public static byte[] GetBytesByPath(string path)         {             FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Read);             BinaryReader br = new BinaryReader(fs);             byte[] bytes = br.ReadBytes((int)fs.Length);             fs.Flush();             fs.Close();             return bytes;         }

        private void DownFile()         {             localhost.Service s = new WindowsFormsApplication1.localhost.Service();             byte[] bs = s.DownloadFile("img18.jpg","image");             FileStream stream=new FileStream(@"C:\Documents and Settings\Administrator\My Documents\My Pictures\18.jpg", FileMode.CreateNew);             stream.Write(bs,0,bs.Length);             stream.Flush();             stream.Close();         }