升级程序开发——读Web.config、执行Sql脚本

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当程序数据库发生修改后，需要执行sql脚本，以修正数据库。数据库连接字符串在web.config文件中，所以此部分设计两部分的内容：读web.config；执行sql脚本文件

读web.config是以读xml文件的方式，找到connectingstring的value，对字符串进行切割、取子字符串的方式获取访问数据库的关键信息：数据库服务器名、数据库名、访问用户名、访问密码

对于脚本文件的执行，通过“GO”来获得脚本文件中包含的需要一次性执行的sql代码，然后再执行所有的代码块就好了

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这里是参考的这篇文章的做法，但是，这篇文章是用C#执行sql文件，再将连接字符串写到web.config中，和我的应用有些差别
http://blog.sina.com.cn/s/blog_4a50d85b0100lzi2.html

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下面的这篇文章，介绍了Split方法的各种重载的应用，并有例子，字符串切割的话可以看看
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程序代码
% a; {. C9 l  V1) public string[] Split(params char[] separator)
2) public string[] Split(char[] separator, int count)
( k  L5 {* B( C7 L; @5 G+ E3) public string[] Split(char[] separator, StringSplitOptions options)
4) public string[] Split(string[] separator, StringSplitOptions options)
8 X  m  s( E% A% h8 d- ^" s5) public string[] Split(char[] separator, int count, StringSplitOptions options)
* W5 P& k9 S% n' X6 r0 Q) a2 ]6) public string[] Split(string[] separator, int count, StringSplitOptions options)
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8 o. X( m. ~0 `! [2 Z( Q" @" h下边我们通过一些实例来说明下怎么使用(以下string words = "1,2.3,,4";)：
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1 s& |# Q. D; [0 e: t  `2 v% ^1. public string[] Split(params char[] separator)
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string[] split = words.Split(new Char[] { ',' });//返回:{"1","2.3","","4"}
string[] split = words.Split(new Char[] { ',', '.' });//返回:{"1","2","3","","4"}
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2. public string[] Split(char[] separator, int count)
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$ O5 p1 E# K9 g/ `. d' o2 c. i 程序代码
# x3 r5 X6 }* ^! b. b$ x5 F) Qstring[] split = words.Split(new Char[] { ',', '.' }, 2);//返回:{"1","2.3,,4"}
7 W5 `! K0 q7 S6 f) xstring[] split = words.Split(new Char[] { ',', '.' }, 6);//返回:{"1","2","3","","4"}
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3. public string[] Split(char[] separator, StringSplitOptions options)
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5 v4 j/ I3 a2 X" B 程序代码
string[] split = words.Split(new Char[] { ',', '.' }, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2","3","4"} 不保留空元素
string[] split = words.Split(new Char[] { ',', '.' }, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素
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4. public string[] Split(string[] separator, StringSplitOptions options)

程序代码
  h5 l) t, d' v" L1 ?8 qstring[] split = words.Split(new string[] { ",", "." }, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2","3","4"} 不保留空元素
string[] split = words.Split(new string[] { ",", "." }, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素

% _  b" Y' W7 Q( G8 N- J5. public string[] Split(char[] separator, int count, StringSplitOptions options)

( S, \. J% Z& k7 Z. o3 ` 程序代码
2 j, n' Z  C1 C3 o; W5 Istring[] split = words.Split(new Char[] { ',', '.' }, 2, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2.3,,4"} 不保留空元素
# b5 u8 @+ _1 j" u% b- jstring[] split = words.Split(new Char[] { ',', '.' }, 6, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素
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# b6 E  b* e- Z6. public string[] Split(string[] separator, int count, StringSplitOptions options)
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string[] split = words.Split(new string[] { ",", "." }, 2, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2.3,,4"} 不保留空元素
string[] split = words.Split(new string[] { ",", "." }, 6, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素