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

' `' h: p8 M6 m. g! W# e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

0 ?  f) S3 R4 l; j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
( x! Y' w( [4 i" Z6 }" r7 Jhttp://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
6 i- W6 l& a9 \5 Phttp://www.itwis.com/html/net/c/20100506/8234.html

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3 \* U) q3 F3 F5 g0 L1) public string[] Split(params char[] separator)
$ G/ i" d9 G; y7 L- |- a) m9 `$ C2) public string[] Split(char[] separator, int count)
3) public string[] Split(char[] separator, StringSplitOptions options)
( `% @! s& ^8 D' A" M5 H- f6 `5 H( U4) public string[] Split(string[] separator, StringSplitOptions options)
5) public string[] Split(char[] separator, int count, StringSplitOptions options)
( F& D4 j( C8 D6) public string[] Split(string[] separator, int count, StringSplitOptions options)

" U/ Q$ @% }- ~2 {& p2 H+ j# n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";)：

1. public string[] Split(params char[] separator)
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程序代码
2 v; b/ J" {/ v' Y+ ]$ n1 H3 nstring[] split = words.Split(new Char[] { ',' });//返回:{"1","2.3","","4"}
( B8 \' _* J& ?8 pstring[] split = words.Split(new Char[] { ',', '.' });//返回:{"1","2","3","","4"}

$ J/ L/ F( p2 |0 n7 n2. public string[] Split(char[] separator, int count)
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程序代码
string[] 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"}
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3. public string[] Split(char[] separator, StringSplitOptions options)

) ~8 L6 W0 |) q9 h# y' w$ T 程序代码
* T9 Z4 F5 _' W* T4 d4 I% Z! _# ^# E$ tstring[] 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

' h8 O$ a! W+ ~% q: l( k, e4. public string[] Split(string[] separator, StringSplitOptions options)

' {- E5 ~/ Y) H# q* _ 程序代码
string[] 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

; w4 j( B! W- h& V5. public string[] Split(char[] separator, int count, StringSplitOptions options)

/ m/ [& h) Z# I4 Y 程序代码
& L* k& X; C$ w' x5 fstring[] split = words.Split(new Char[] { ',', '.' }, 2, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2.3,,4"} 不保留空元素
8 S- T! F7 q) n6 f# W0 v$ \string[] split = words.Split(new Char[] { ',', '.' }, 6, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素

  `8 ~+ z2 ~% K0 z8 Y4 r. i6. public string[] Split(string[] separator, int count, StringSplitOptions options)
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代码
string[] split = words.Split(new string[] { ",", "." }, 2, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2.3,,4"} 不保留空元素
( `+ N' e2 E9 Q- i( X* Mstring[] split = words.Split(new string[] { ",", "." }, 6, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素