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linq ContAins in

Contains是指from f 中的这个f,字符串是没问题的,但如果f是int的话,你想它要怎么实现Contains呢?

query = from c in tbs where c.sx != "类别" && c.path_tbname.Contains(tName.Text) orderby c.id select c; Contains 等于 like '%'+tName.Text+'%'

stringp[] keys = {"a","b","c"}; var query = dataBase.Where(c=>keys.Contains(c));

方法很多,一种是集合相交论。另外一种是循环遍历 --------------------------------------------------------------------- 第二种较为容易理解: from p in table1 where !(from z in table2 select z.id).Contains(p.id) select p ----------...

分少点!回头入我团队帮我打工偿还呀!O(∩_∩)O哈哈~ --------- 你根本不是级联的问题,而是要保持Contains方法功能的特殊性,它有模糊匹配的功能! ------ 第一种方式:轻装上阵,小集合拼合! var names = dataLst.Select(item => item.Name).S...

报错是什么,最好写出测试用例。

这样写,完全正确 var querys=from u in f.Users where u.id.Contains(id) && u.name.Contains(name) select u;

from t1 in table1 _ where (from t2 in table2 select t2.name).ToArray.Contains(t1.name) _ select t1 如果上述不能编译,请将(from t2 in table2 select t2.name).ToArray这句赋予一个变量,然后将这句替换成这个变量就行了

//这样试试: var pro=(from p in Products where p.SearchKeyword.Split(',').ToList().Contains(keyWord) select p).ToList(); 或 var pro=(from p in Products where p.SearchKeyword.IndexOf(keyWord)>-1 select p).ToList();

query=fromcintbswherec.sx!="类别"&&c.path_tbname.Contains(tName.Text)orderbyc.idselectc;Contains等于like'%'+tName.Text+'%'

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