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  • Entity Framework GroupBy usage

     分组后,循环子集的方法

                var rightScopes = db.RightScope.ToList();
                var rightScopeType = rightScopes.OrderBy(rs => rs.ClaimValue).GroupBy(rs => rs.ClaimType);
    
                //一级目录.得到ClaimType分组.每一个分组.增加一级.容易查看.
                foreach (var item in rightScopeType)
                {
                    tree_children.name = item.Key;
    
                    //二级目录..得到一个分组.显示出来.
                    foreach (RightScope rs in item)
                    {                   
                        tree_children_last.type = rs.ClaimType;
                        tree_children_last.value = rs.ClaimValue; 
                    }               
                }       

     分组后,直接Tolist()取得子集的方法

                var rightScopeType = rightScopes.OrderBy(rs => rs.ClaimValue).GroupBy(rs => rs.ClaimType);
                foreach (var item in rightScopeType)
                {               
                    tree_children.name = item.Key;
                    RightScope rs =item.Tolist();                           
                } 
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  • 原文地址:https://www.cnblogs.com/cxd1008/p/9145607.html
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