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
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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
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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
http://www.itwis.com/html/net/c/20100506/8234.html
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程序代码
1) public string[] Split(params char[] separator)
7 v, f, ~* U* T, V6 q; r2) public string[] Split(char[] separator, int count)
3) public string[] Split(char[] separator, StringSplitOptions options)
4) public string[] Split(string[] separator, StringSplitOptions options)
5) public string[] Split(char[] separator, int count, StringSplitOptions options)
6) public string[] Split(string[] separator, int count, StringSplitOptions options)
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  M# Y( t* O9 A5 o% b+ ~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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; z- E) P' `4 V6 |+ p( g2 Y1. public string[] Split(params char[] separator)

程序代码
  ]: @1 g9 `5 E5 ]  Jstring[] split = words.Split(new Char[] { ',' });//返回:{"1","2.3","","4"}
; t) W) K& r' i5 }string[] split = words.Split(new Char[] { ',', '.' });//返回:{"1","2","3","","4"}

8 O! k+ T  x' T. w% r1 t( f2. public string[] Split(char[] separator, int count)

程序代码
* a  }# q8 v# p# c( fstring[] split = words.Split(new Char[] { ',', '.' }, 2);//返回:{"1","2.3,,4"}
string[] split = words.Split(new Char[] { ',', '.' }, 6);//返回:{"1","2","3","","4"}

$ n. }5 ?3 A! U; [0 P% d- V3. public string[] Split(char[] separator, StringSplitOptions options)
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3 ^! ~) L; X8 C7 T$ L 程序代码
, F. y/ U- K: t6 L% b) hstring[] 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

4. public string[] Split(string[] separator, StringSplitOptions options)

6 ^9 _' |, ~) X) r+ j 程序代码
string[] split = words.Split(new string[] { ",", "." }, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2","3","4"} 不保留空元素
# ]" Q' Q" W1 }% l. m& gstring[] split = words.Split(new string[] { ",", "." }, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素
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5. public string[] Split(char[] separator, int count, StringSplitOptions options)
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3 {: D( ~5 \& A4 r0 f# D 程序代码
( k& b7 e9 P. M' H$ R) Istring[] split = words.Split(new Char[] { ',', '.' }, 2, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2.3,,4"} 不保留空元素
string[] split = words.Split(new Char[] { ',', '.' }, 6, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素

% g8 D. ]2 s+ [* r! W9 ?  V6. 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