<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[xy_int的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/xy_int</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; xy_int]]></copyright><item><title><![CDATA[MySQL入门]]></title><link>https://blog.youkuaiyun.com/xy_int/article/details/134548480</link><guid>https://blog.youkuaiyun.com/xy_int/article/details/134548480</guid><author>xy_int</author><pubDate>Wed, 22 Nov 2023 11:07:35 +0800</pubDate><description><![CDATA[创建索引的原则：优先选择为 经常出现在查询条件或排序、分组后面的字段创建索引优点：可以大大的提高查询速度；减少查询中分组和排序的时间；通过创建唯一索引保证数据的唯一性缺点：创建和维护索引需要时间，数据量越大，时间越长；表中的数据进行增删改操作时，也需要进行维护，降低了维护的速度；索引文件需要占据磁盘空间。]]></description><category></category></item><item><title><![CDATA[c# 画热力图（二）]]></title><link>https://blog.youkuaiyun.com/xy_int/article/details/81533979</link><guid>https://blog.youkuaiyun.com/xy_int/article/details/81533979</guid><author>xy_int</author><pubDate>Thu, 09 Aug 2018 11:45:25 +0800</pubDate><description><![CDATA[public void DrawHeat(string filePath, string sheetName)
        {
            string ParamPalettePath = @&quot;D:\Ventuz5\01\Images\HeatMap/palette.png&quot;;//颜色板

            DataTable dt = GetExcelTable(file...]]></description><category></category></item><item><title><![CDATA[c# 画热力图（一）]]></title><link>https://blog.youkuaiyun.com/xy_int/article/details/81533935</link><guid>https://blog.youkuaiyun.com/xy_int/article/details/81533935</guid><author>xy_int</author><pubDate>Thu, 09 Aug 2018 11:42:06 +0800</pubDate><description><![CDATA[ public class HeatMap
    {
        public float BrushStop { get; set; }
        public int Radius { get; set; }
        private struct HeatPoint
        {
            public Point point;
            ...]]></description><category></category></item><item><title><![CDATA[c# 贝塞尔计算]]></title><link>https://blog.youkuaiyun.com/xy_int/article/details/81533864</link><guid>https://blog.youkuaiyun.com/xy_int/article/details/81533864</guid><author>xy_int</author><pubDate>Thu, 09 Aug 2018 11:39:06 +0800</pubDate><description><![CDATA[  public class PointF
        {
            public float X { get; set; }
            public float Y { get; set; }
        }
      public Dictionary&amp;lt;string,string&amp;gt; Getpoints(string[] args)
      ...]]></description><category></category></item><item><title><![CDATA[c#  NPOI 的Excel读取代码]]></title><link>https://blog.youkuaiyun.com/xy_int/article/details/81533834</link><guid>https://blog.youkuaiyun.com/xy_int/article/details/81533834</guid><author>xy_int</author><pubDate>Thu, 09 Aug 2018 11:37:43 +0800</pubDate><description><![CDATA[首页下NPOI 

 

/// &amp;lt;summary&amp;gt;         ///将Excel转为DataTable         /// &amp;lt;/ summary&amp;gt;         /// &amp;lt;param name =“filePath”&amp;gt;文件路径&amp;lt;/ param&amp;gt;         /// &amp;lt;returns&amp;gt; &amp;lt;/ returns&amp;gt; ...]]></description><category></category></item><item><title><![CDATA[c# txt文件的写入和读取]]></title><link>https://blog.youkuaiyun.com/xy_int/article/details/80914989</link><guid>https://blog.youkuaiyun.com/xy_int/article/details/80914989</guid><author>xy_int</author><pubDate>Wed, 04 Jul 2018 16:38:57 +0800</pubDate><description><![CDATA[//写入  public static void FileStreamWirte(string FilePath, string FileContent)        {            try            {                string datetime = DateTime.Now.ToString(&quot;yyyyMMdd&quot;);                if...]]></description><category></category></item><item><title><![CDATA[python 运算符]]></title><link>https://blog.youkuaiyun.com/xy_int/article/details/80886195</link><guid>https://blog.youkuaiyun.com/xy_int/article/details/80886195</guid><author>xy_int</author><pubDate>Mon, 02 Jul 2018 16:56:32 +0800</pubDate><description><![CDATA[1、算术运算符：=、/、//（取整）、*、-、+、**（次方）2、赋值运算符：=3、比较（关系）运算符：and 、or 、not 4、逻辑运算符5、成员运算符6、身份运算符7、位运算符...]]></description><category></category></item><item><title><![CDATA[python 集合set的特性和常用操作]]></title><link>https://blog.youkuaiyun.com/xy_int/article/details/80855338</link><guid>https://blog.youkuaiyun.com/xy_int/article/details/80855338</guid><author>xy_int</author><pubDate>Fri, 29 Jun 2018 13:59:13 +0800</pubDate><description><![CDATA[1、无序2、不重复性3、逻辑关系（in 和ont in 的用法,其中in表示包含，not in 表示不包含）例：A={1,2,3,4,5,6}      B={1,3,5,7,8,9}     c=3     D=c in A     print(D)(结果为true)4、两个集合的求差（-减号或用difference,其中A.difference_update(B)表示更新到A集合中）例：A={...]]></description><category></category></item><item><title><![CDATA[python 中基本数据类型]]></title><link>https://blog.youkuaiyun.com/xy_int/article/details/80855126</link><guid>https://blog.youkuaiyun.com/xy_int/article/details/80855126</guid><author>xy_int</author><pubDate>Fri, 29 Jun 2018 13:03:01 +0800</pubDate><description><![CDATA[数字（NUMBER）：整数(INT)，浮点(FLOAT)，布尔(BOOL)，复数（COMPLEX）;其中BOOL的值为NONE或者是空值或零为假                     1字符串（STR）组：1、序列: 2列表（LIST）:定义一个空List：[]，                            3元组（TUPLE）：定义一个空Tuple：（），其中定义一个元素的tuple...]]></description><category></category></item><item><title><![CDATA[C#连接OPC进行数据交互]]></title><link>https://blog.youkuaiyun.com/xy_int/article/details/80854404</link><guid>https://blog.youkuaiyun.com/xy_int/article/details/80854404</guid><author>xy_int</author><pubDate>Fri, 29 Jun 2018 11:27:57 +0800</pubDate><description><![CDATA[步骤：引用OPCNETAPI.DLL &amp;amp;&amp;amp; OPCNETAPI.COM.DLL          1.查询服务器2.连接服务器3.读取数据4.写入数据1.查询服务器：根据IP地址进行查询代码如下：          //查询服务器            尝试            {                 Opc.Server [] servers = m_discove...]]></description><category></category></item><item><title><![CDATA[Oracle 数据库备份]]></title><link>https://blog.youkuaiyun.com/xy_int/article/details/79447094</link><guid>https://blog.youkuaiyun.com/xy_int/article/details/79447094</guid><author>xy_int</author><pubDate>Mon, 05 Mar 2018 16:10:40 +0800</pubDate><description><![CDATA[一、通过EXP备份先写个批处理文件（.bat），具体如下：@echo off@echo ================================================@echo  windows环境下Oracle数据库的自动备份脚本@echo  说明：启动备份时，需要配置以下变量@echo    1、BACKUP_DIR           指定要备份到哪个目录@echo    ...]]></description><category></category></item><item><title><![CDATA[c#服务程序]]></title><link>https://blog.youkuaiyun.com/xy_int/article/details/54907787</link><guid>https://blog.youkuaiyun.com/xy_int/article/details/54907787</guid><author>xy_int</author><pubDate>Tue, 07 Feb 2017 11:17:32 +0800</pubDate><description><![CDATA[1、新建项目=======》Visualc#.windows======>windows服务====》新建完成 （服务项目名称自取）
2、打开Service1.cs======》右击添加安装程序======》=========》在查看S而vice1的代码======》
=====>编写代码即可


3、安装服务

用.net framework工具INSTALLUTIL安装服务程序即]]></description><category></category></item><item><title><![CDATA[c# string类型和json之间的相互转换]]></title><link>https://blog.youkuaiyun.com/xy_int/article/details/53608857</link><guid>https://blog.youkuaiyun.com/xy_int/article/details/53608857</guid><author>xy_int</author><pubDate>Tue, 13 Dec 2016 13:52:19 +0800</pubDate><description><![CDATA[// 从一个对象信息生成Json串
        public 
static string ObjectToJson(object obj)
        {
           return JavaScriptConvert.SerializeObject(obj);
        }
        // 从一个Json串生成对象信息
        public]]></description><category></category></item><item><title><![CDATA[js判断鼠标滚动放下，向上滚还是向下滚？]]></title><link>https://blog.youkuaiyun.com/xy_int/article/details/53607030</link><guid>https://blog.youkuaiyun.com/xy_int/article/details/53607030</guid><author>xy_int</author><pubDate>Tue, 13 Dec 2016 10:38:06 +0800</pubDate><description><![CDATA[>  
html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">  
head>  
    meta http-equiv="Content-Type" content="text/html;charset=UTF-8" />  
    title>title>  
    script type="text/javascrip]]></description><category></category></item></channel></rss>