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
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" D! S8 ?# P" t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
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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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" i" F" ?% e3 r% C  H4 s1) public string[] Split(params char[] separator)
2) public string[] Split(char[] separator, int count)
3) public string[] Split(char[] separator, StringSplitOptions options)
/ V: o" z9 B) j3 y4 x7 {4) public string[] Split(string[] separator, StringSplitOptions options)
0 C: n* t, J8 N8 m6 {6 {) y6 D5) public string[] Split(char[] separator, int count, StringSplitOptions options)
6) public string[] Split(string[] separator, int count, StringSplitOptions options)

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. public string[] Split(params char[] separator)

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string[] split = words.Split(new Char[] { ',' });//返回:{"1","2.3","","4"}
1 C8 k! n: D0 T. J0 s: p7 r! b: Nstring[] split = words.Split(new Char[] { ',', '.' });//返回:{"1","2","3","","4"}
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! |; v5 A; z% ]0 E& \2. public string[] Split(char[] separator, int count)
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2 h/ o* T3 @! e5 c4 s7 istring[] split = words.Split(new Char[] { ',', '.' }, 2);//返回:{"1","2.3,,4"}
& ?, J3 d* y5 B3 _6 C( Pstring[] split = words.Split(new Char[] { ',', '.' }, 6);//返回:{"1","2","3","","4"}
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# a. n) G9 K1 x" `, y3. public string[] Split(char[] separator, StringSplitOptions options)
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程序代码
# @. J, X' [$ o3 Z% P, Q+ H' Nstring[] 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
- l% z) _& o7 h" j( P# ?4 s+ pstring[] 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
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5. public string[] Split(char[] separator, int count, StringSplitOptions options)
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程序代码
# R! \# O. z' g. Pstring[] split = words.Split(new Char[] { ',', '.' }, 2, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2.3,,4"} 不保留空元素
4 b0 ]9 ]( q7 o& {string[] split = words.Split(new Char[] { ',', '.' }, 6, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素
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( `  S0 c/ }: ~3 a1 X  Y, O6. public string[] Split(string[] separator, int count, StringSplitOptions options)
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代码
7 f  U* m4 a: n2 G. F' hstring[] split = words.Split(new string[] { ",", "." }, 2, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2.3,,4"} 不保留空元素
! _& p% S; |& q( d  y& z- u& |string[] split = words.Split(new string[] { ",", "." }, 6, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素