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List<UserInfo> UserInfoList= new List<UserInfo> while(reader.Read()) { UserInfo userinfo = new UserInfo(); userinfo.Age = reader["Age"].ToString(); us 阅读全文
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方法一: static void TestMethod(DateTime? date = null) { date = date ?? DateTime.Now; //若date有值,date为指定日期值,date为空或者不传此值,date为Now } 感谢:https://www.cnblogs. 阅读全文
摘要:
方法一: static void TestMethod(DateTime? date = null) { date = date ?? DateTime.Now; //若date有值,date为指定日期值,date为空或者不传此值,date为Now } 感谢:https://www.cnblogs. 阅读全文