WebService下载文件代码,CSharp代码库,德仔网

代码语言
代码分类
【CSharp】 WebService下载文件
作者:xqf222 / 发布于2014/2/25/ 574
WebService项目中的Web.config配置代码

 <appSettings>
 <add key="UploadFileFolder" value="/Uploads/TestUpload/" />
 </appSettings>

WebService项目中的ImageService.asmx代码
 /// <summary>
 /// Webservice中的下载文件处理函数
 /// </summary>
 /// <param name="filePath">文件路径</param>
 /// <returns>返回文件流</returns>
 [WebMethod(Description = "下载服务器站点文件，传递文件相对路径")]
 public byte[] DownloadFile(string strFilePath)
 {
 FileStream fs = null;
 string CurrentUploadFolderPath = Server.MapPath(ConfigurationManager.AppSettings["UploadFileFolder"]);
 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];
 }
 }

Winform项目中的窗体下载按钮代码
 private void btnDownload_Click(object sender, EventArgs e)
 {
 string CurrentServiceFilePath = this.txtServiceFile.Text.Trim();
 string CurrentDownloadFolderPath = this.txtDownloadFolder.Text.Trim();

 if (CurrentServiceFilePath == "" || CurrentDownloadFolderPath == "")
 {
 MessageBox.Show(DownloadImage(CurrentServiceFilePath, CurrentDownloadFolderPath)); 
 }
 else if (CurrentServiceFilePath == "")
 {
 MessageBox.Show("请填写要下载的服务器文件路径和选择本地保存目录");
 }
 else if (CurrentDownloadFolderPath == "")
 {

 MessageBox.Show("请填写要下载的服务器文件路径和选择本地保存目录");
 
 }
 }

Winform项目中的窗体下载按钮调用函数

 /// <summary>
 /// 通过WebService下载文件
 /// </summary>
 /// <param name="ServiceFilePath">服务器图片路径</param>
 /// <param name="DownloadFolderPath">本地图片路径</param>
 private string DownloadImage(string ServiceFilePath, string DownloadFolderPath)
 {
 try
 {
 string DownloadFileName="";
 if (ServiceFilePath.Contains("/"))
 {
 DownloadFileName=ServiceFilePath.Substring(ServiceFilePath.LastIndexOf("/"));
 }
 else
 {
 DownloadFileName = ServiceFilePath;
 }
 string DownloadFilePath = DownloadFolderPath +"\\"+ DownloadFileName;
 localhost.ImageService myImageService=new localhost.ImageService();
 byte[] bytes = myImageService.DownloadFile(ServiceFilePath);
 if (bytes != null)
 {
 if (!Directory.Exists(DownloadFolderPath)) {
 Directory.CreateDirectory(DownloadFolderPath);
 }
 if (!File.Exists(DownloadFilePath))
 {
 File.Create(DownloadFilePath).Dispose();
 }
 //如果不存在完整的上传路径就创建
 FileInfo downloadInfo = new FileInfo(DownloadFilePath);
 if (downloadInfo.IsReadOnly) { downloadInfo.IsReadOnly = false; }
 //定义并实例化一个内存流，以存放提交上来的字节数组。
 MemoryStream ms = new MemoryStream(bytes);
 //定义实际文件对象，保存上载的文件。
 FileStream fs = new FileStream(DownloadFilePath, FileMode.Create);
 ///把内内存里的数据写入物理文件
 ms.WriteTo(fs);
 fs.Flush();
 ms.Flush();
 ms.Close();
 fs.Close();
 fs = null;
 ms = null;
 }
 return "下载成功";
 }
 catch(Exception ex)
 {
 return "下载失败"+ex.Message;
 }
 }
试试其它关键字
　WebService下载文件　
同语言下
可能有用的
xqf222贡献的其它代码(82)