public void Add(MSDS_Composition entity)
{
if (_context.MSDS_Composition.Any(x => x.CASCode == entity.CASCode || x.Composition_Name == entity.Composition_Name))
{
throw new Exception("该组分已经存在！");
}
_context.MSDS_Composition.Add(entity);
}
public void Add(MSDS_Composition entity)
{
_repository.Add(entity);
}