EF的使用

EF的使用

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Expression<Func<CustomerType, bool>> expression = c => (c.Id != null);<br>   var c = from u in ccc                     where u.Name == editModel.Name                     select u.Name;             ccc.Select(u => u.Name == "");             ccc.Where(u => u.Name == "").Any(u=>u.Name=="");

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<br>1，var cumtomerType = dbContext.CustomerTypes.FirstOrDefault(me => me.Id == id); 2，list = dbContext.CustomerTypes.Where(expression).OrderByDescending(c => c.CreateTime).Skip((pageIndex - 1) * pageSize).Take 3，query.Any(,)确定序列是否包含

1	select挑选列，where用于筛选