Linq To Sql Distinct去重
1 var result = (from o in db.grade 2 orderby o.grade_score 3 select new { o.grade_score}).Distinct(); 4 SelectList selectListitem2 = new SelectList(result.ToList(), "grade_score", "grade_score"); 5 selectList.AddRange(selectListitem2); 6 ViewBag.T_Category = selectList;

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