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)
1 H5 A1 L3 S' s1 e2) 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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  v; p) x1 P, q( C& s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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3 f( |; _( p, O* Fstring[] split = words.Split(new Char[] { ',' });//返回:{"1","2.3","","4"}
# @. s( d  p1 W) P% Cstring[] split = words.Split(new Char[] { ',', '.' });//返回:{"1","2","3","","4"}

( j. F! M, [! Z/ {; t. G! c# T2. public string[] Split(char[] separator, int count)
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* q& R" W/ o2 i5 Tstring[] split = words.Split(new Char[] { ',', '.' }, 2);//返回:{"1","2.3,,4"}
* w4 C7 h6 G6 y3 E# Tstring[] split = words.Split(new Char[] { ',', '.' }, 6);//返回:{"1","2","3","","4"}

3. public string[] Split(char[] separator, StringSplitOptions options)
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1 h: E0 T$ J8 M* ~/ Sstring[] 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

9 Y2 ^3 J2 I0 H1 o5 D5 Z7 w4. public string[] Split(string[] separator, StringSplitOptions options)
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程序代码
# j' |0 b- L+ R6 ?! Y/ ]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
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5. public string[] Split(char[] separator, int count, StringSplitOptions options)
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5 |0 D- j4 v6 ~* J; h  \  M% gstring[] split = words.Split(new Char[] { ',', '.' }, 2, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2.3,,4"} 不保留空元素
- n1 C7 |6 v2 A0 L+ Rstring[] split = words.Split(new Char[] { ',', '.' }, 6, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素
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/ V. d% I0 U; B( ]1 g6. public string[] Split(string[] separator, int count, StringSplitOptions options)

代码
string[] split = words.Split(new string[] { ",", "." }, 2, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2.3,,4"} 不保留空元素
+ a/ K$ e- S& I" a& v9 Sstring[] split = words.Split(new string[] { ",", "." }, 6, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素