EF的使用

2024-10-21 04:13:09

Expression<Func<CustomerType, bool>> expression = c => (c.Id != null);

  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=="");

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

select挑选列，where用于筛选

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