ASP.NET上传下载文件示例，使用webClient实现

 

/// <summary> /// WebClient上传文件至服务器 /// </summary> /// <param name="fileNamePath">文件名，全路径格式</param> /// <param name="uriString">服务器文件夹路径</param> public string UploadFile(string fileNamePath,string uriString) { string fileName = fileNamePath.Substring(fileNamePath.LastIndexOf("//") + 1); string NewFileName = DateTime.Now.ToString("yyMMddhhmmss") + DateTime.Now.Millisecond.ToString() + fileNamePath.Substring(fileNamePath.LastIndexOf(".")); string fileNameExt = fileName.Substring(fileName.LastIndexOf(".") + 1); if(uriString.EndsWith("/") == false) { uriString = uriString + "/"; } uriString = uriString + NewFileName; // 创建WebClient实例 WebClient myWebClient = new WebClient(); myWebClient.Credentials = CredentialCache.DefaultCredentials; // 要上传的文件 FileStream fs = new FileStream(fileNamePath, FileMode.Open, FileAccess.Read); //FileStream fs = OpenFile(); BinaryReader r = new BinaryReader(fs); try { //使用UploadFile方法可以用下面的格式 //myWebClient.UploadFile(uriString,"PUT",fileNamePath); byte[] postArray = r.ReadBytes((int)fs.Length); Stream postStream = myWebClient.OpenWrite(uriString,"PUT"); if(postStream.CanWrite) { postStream.Write(postArray,0,postArray.Length); } else { return "No Write."; } postStream.Close(); return "Succefull"; } catch(Exception ex) { return "Error:" + ex.Message; } } /// <summary> /// 下载服务器文件至客户端 /// </summary> /// <param name="URL">被下载的文件地址，绝对路径</param> /// <param name="Dir">另存放的目录</param> public string Download(string URL,string Dir) { WebClient client = new WebClient(); string fileName = URL.Substring(URL.LastIndexOf("/") + 1); //被下载的文件名 string Path = Dir+fileName; //另存为的绝对路径＋文件名 try { WebRequest myre=WebRequest.Create(URL); } catch(Exception ex) { return "Error:" + ex.Message; } try { client.DownloadFile(URL,Path); return "Succefull"; } catch(Exception ex) { return "Error:" + ex.Message; } }