C# 将EXCEL表格转化为二进制字符串,通过文件流让前端下载

/// <summary>
/// EXCEL表格转化为二进制字符串导出
/// </summary>
/// <param name="path">文件路径</param>
public void DownLoadModuleFile(string path)
{
  // 若已知单独文件地址可直接传入地址
  var path = HttpContext.Current.Server.MapPath(path);

  // 将文件读取成二进制流
  FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Read);
  BinaryReader r = new BinaryReader(fs);
  byte[] buf = r.ReadBytes((int)fs.Length);
  fs.Dispose();
  
  //文件名
  var fileName = $"test.xlsx";
  //流方式下载文件
  HttpContext.Current.Response.ContentType = "application/octet-stream";
  //通知浏览器下载文件而不是打开
  HttpContext.Current.Response.AddHeader("Content-Disposition",$"attachment; filename={HttpUtility.UrlEncode(fileName)}");
  HttpContext.Current.Response.BinaryWrite(buf);
  HttpContext.Current.Response.Flush();
  HttpContext.Current.Response.End();
}

 

posted @ 2022-03-14 13:24  混子一  阅读(1001)  评论(0)    收藏  举报