Linq初学用法(1)

对Dictionary查询

        Dictionary<string, tableInfo> _structTable;
        /*
         _structTable添加了内容
        */
        List<string> sd = (from tb in _structTable
                         where tb.Value.tableName.ToLower().IndexOf(p.ToLower()) >= 0
                         select tb.Value.tableName).ToList<string>();

在一个结构里查询-----------------------------------------------------

先定义一个结构

 class test
    {
        public test(string a,string b)
        {
            aa = a;
            bb = b;
        }
        public string aa;
        public string bb;
    }

实例化与查询

 List<test> lstT = new List<test>();
            lstT.Add(new test("asd", "jjj"));
            lstT.Add(new test("2q1", "weq"));
            lstT.Add(new test("2qyyy", "rr"));
            lstT.Add(new test("5qwty", "rf1gr"));
            List<test> lstT2 = (from t in lstT where t.aa.IndexOf("1") > 0 || t.bb.IndexOf("1") > 0 select t).ToList<test>();
            List<test> lstT3= lstT.Where(a=>a.aa.IndexOf("2") >= 0 ).ToList<test>();