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(); }