public async Task <IResultModel> Import(IFormFile formFile)
{
var oldData = await _repository.GetListAsync(m => m.IsDel == false);
var data = _excelHandler.Import <MediaTypeImportModel>(formFile);
var entities = _mapper.Map <List <MediaTypeEntity> >(data)
.Where(m => !oldData.Select(m => m.Ext).Contains(m.Ext)).ToList();
var result = await _repository.InsertRangeAsync(entities);
return(ResultModel.Result(result));
}