Это мой код C#
Код: Выделить всё
string fileName = "Report.xlsx";
Response.Clear();
Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";// "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet.main+xml"; //"application/vnd.openxmlformats-officedocument.spreadsheetml.worksheet+xml" '"application/vnd.openxmlformats-officedocument.spreadsheetml.sheet" '"application/vnd.ms-excel"
Response.AddHeader("Content-Disposition", "attachment;filename=" + fileName);
Подробнее здесь: https://stackoverflow.com/questions/206 ... ng-xlsx-fi