<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[qq_50071874的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/qq_50071874</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; qq_50071874]]></copyright><item><title><![CDATA[windows局域网共享文件夹]]></title><link>https://blog.youkuaiyun.com/qq_50071874/article/details/139833654</link><guid>https://blog.youkuaiyun.com/qq_50071874/article/details/139833654</guid><author>qq_50071874</author><pubDate>Thu, 20 Jun 2024 20:30:00 +0800</pubDate><description><![CDATA[实现在局域网内，把一台电脑的文件夹共享到局域网内，供其他电脑访问。]]></description><category></category></item><item><title><![CDATA[C#西门子plc基础通讯]]></title><link>https://blog.youkuaiyun.com/qq_50071874/article/details/139610530</link><guid>https://blog.youkuaiyun.com/qq_50071874/article/details/139610530</guid><author>qq_50071874</author><pubDate>Thu, 20 Jun 2024 20:30:00 +0800</pubDate><description><![CDATA[总结：基于Hslcommunication第三方库，与西门子plc进行读写操作。1、工具 -> NuGet包管理器 -> 管理解决方案的NuGet程序包；2、搜索并找到HslCommunication，选择对应的项目，点击安装；3、在相关的类中引用命名空间。]]></description><category></category></item><item><title><![CDATA[C # VS常见快捷方式]]></title><link>https://blog.youkuaiyun.com/qq_50071874/article/details/139538975</link><guid>https://blog.youkuaiyun.com/qq_50071874/article/details/139538975</guid><author>qq_50071874</author><pubDate>Sat, 08 Jun 2024 09:06:38 +0800</pubDate><description><![CDATA[F5调试运行，F9 增加/删除断点，F10逐过程运行，F11逐语句运行。Ctrl+X 剪切当前行，Ctrl+D 复制当前行，Ctrl+V 粘贴。Ctrl+K Ctrl+C 注释，Ctrl+K Ctrl+U 取消注释。Ctrl+\ Ctrl+T 显示任务列表（视图-任务列表）Alt+↑️  当前行上移，Alt+↓    当前行下移。F12转到定义，Ctrl+-向后导航。Ctrl+K Ctrl+D自动格式化。ctor + Tab 新建构造函数。prop + Tab 定义属性。/// 自动插入XML注释。]]></description><category></category></item><item><title><![CDATA[ADO.NET中的五个重要对象]]></title><link>https://blog.youkuaiyun.com/qq_50071874/article/details/138976430</link><guid>https://blog.youkuaiyun.com/qq_50071874/article/details/138976430</guid><author>qq_50071874</author><pubDate>Thu, 16 May 2024 22:14:02 +0800</pubDate><description><![CDATA[ADO.NET使用Connection对象连接数据库，使用Command或DataAdapter对象来执行SQL语句，并将执行的结果返回给DataReader或DataSet，然后再使用取得的DataReader或DataSet对象操作数据结果。]]></description><category></category></item><item><title><![CDATA[C# 进制转换]]></title><link>https://blog.youkuaiyun.com/qq_50071874/article/details/138959911</link><guid>https://blog.youkuaiyun.com/qq_50071874/article/details/138959911</guid><author>qq_50071874</author><pubDate>Thu, 16 May 2024 15:08:14 +0800</pubDate><description><![CDATA[/结果为F，原理为先转为十进制后转16进制。//第一个参数“0X07”为16进制（前面必须加0X，例如0X1A3F，0X0F等）1）Convert.ToInt32("1A3F", 16);]]></description><category></category></item><item><title><![CDATA[C# ref和out的用法示例]]></title><link>https://blog.youkuaiyun.com/qq_50071874/article/details/138867078</link><guid>https://blog.youkuaiyun.com/qq_50071874/article/details/138867078</guid><author>qq_50071874</author><pubDate>Tue, 14 May 2024 20:20:26 +0800</pubDate><description><![CDATA[总结：ref可以把值传入方法内，也可以传到方法外，out只能把值传到方法外。简介：ref和out都是按地址传递,使用后都将改变原来参数的数值。]]></description><category></category></item><item><title><![CDATA[C# LINQ和Lambda表达式对照]]></title><link>https://blog.youkuaiyun.com/qq_50071874/article/details/135146858</link><guid>https://blog.youkuaiyun.com/qq_50071874/article/details/135146858</guid><author>qq_50071874</author><pubDate>Mon, 13 May 2024 17:00:07 +0800</pubDate><description><![CDATA[(1) 基础的查询语句(2) 条件查询语句(3) 关于“COUNT、SUM、MIN、MAX”函数的语句(4) 关于数据排序的语句 (5)  关于分页查询的语句(6) 关于模糊查询LIKE的语句(7) 关于分组查询的语句(8) 关于in查询的语句]]></description><category></category></item><item><title><![CDATA[SQL中LIKE条件常用的四种模糊查询]]></title><link>https://blog.youkuaiyun.com/qq_50071874/article/details/135124646</link><guid>https://blog.youkuaiyun.com/qq_50071874/article/details/135124646</guid><author>qq_50071874</author><pubDate>Thu, 21 Dec 2023 11:02:47 +0800</pubDate><description><![CDATA[如select * from [userInfo] where user_name LIKE '长老[1-9]'，将找出“长老1”、“长老2”、......、“长老9”。将会找出user_name为"张三"，“李三”，“三脚猫”，“王三娃”等等有“三”的记录。将会把user_name为“张三娃”，“唐三藏”等等，三个字且中间一个字为“三”的找出来。将找出user_name不为“张三”、“王三”、“李三”的用户信息。将找处“张三”、“王三”、“李三”、“刘三”。]]></description><category></category></item><item><title><![CDATA[SQL函数随记]]></title><link>https://blog.youkuaiyun.com/qq_50071874/article/details/123471594</link><guid>https://blog.youkuaiyun.com/qq_50071874/article/details/123471594</guid><author>qq_50071874</author><pubDate>Tue, 15 Mar 2022 08:36:52 +0800</pubDate><description><![CDATA[desc/asc、convert、datediff、abs、count]]></description><category></category></item></channel></rss>