Rest文件下载

 public void DownloadFile(string fileId)

        {

            //Stream fileStream = null;

            try

            {

                int fileID = Convert.ToInt32(fileId);

                string RelatePath = fileInfoBLL.GetRelatePath(fileID);

                string fileFullPath = filePath + "\\" + RelatePath;

                string fileName = fileInfoBLL.GetFileName(fileID);

                var response = HttpContext.Current.Response;

                response.Clear();

                response.Buffer = true;

                //fileName = System.Web.HttpUtility.UrlEncode(fileName, System.Text.Encoding.GetEncoding("UTF-8"));

                response.AppendHeader("Content-Disposition", "attachment;filename=" + fileName);

                response.ContentEncoding = System.Text.Encoding.UTF8;

                response.Charset = "UTF-8";

                response.WriteFile(fileFullPath);

            }

            catch (Exception ex)

            {

                ExceptionHandler.ExceptionHelper.Instance.HandleException(ex);

            }

        }

将字符串转换成指定编码格式：

1   string fileName = System.Web.HttpUtility.UrlEncode("要转换的字符串", System.Text.Encoding.GetEncoding("UTF-8"));

2    string gbStr =  System.Text.Encoding.GetEncoding("gb2312").GetString(System.Text.Encoding.Default.GetBytes(‘xxx‘));

另一种：

 1  private void DownloadFile(string fileName, string filePath)

 2         {

 3             try

 4             {

 5                 if (!string.IsNullOrEmpty(filePath))

 6                 {

 7                     if (string.IsNullOrEmpty(fileName))

 8                     {

 9                         fileName = filePath.Substring(filePath.LastIndexOf("\\") + 1);

10                     }

11

12                     context.Response.Clear();

13                     context.Response.Buffer = true;

14                     context.Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlPathEncode(fileName));

15                     context.Response.ContentEncoding = System.Text.Encoding.UTF8;

16                     context.Response.Charset = "UTF-8";

17                     //context.Response.ContentType = "application/vnd.ms-excel";

18                     context.Response.WriteFile(UploadFileSavePath + "\\" + filePath);

19                 }

20             }

21             catch (Exception ex)

22             {

23                 ExceptionHelper.Instance.HandleException(ex);

24                 context.Response.Write("{\"bizSuccess\":false,\"msg\":\"下载文件时发生错误！\"}");

25             }

26

27             context.Response.Flush();

28             context.Response.End();

29         }

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