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

2 [  h1 s+ R8 |, |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
' n: `  [' r3 \, N0 }( rhttp://www.itwis.com/html/net/c/20100506/8234.html

9 j' o# r5 l7 O8 W% |1 s$ H程序代码
1) public string[] Split(params char[] separator)
5 }9 c1 s- u' L+ T6 t. d2) public string[] Split(char[] separator, int count)
, J! l: W0 x. w' f0 Z3) public string[] Split(char[] separator, StringSplitOptions options)
' H/ e) Z) W+ i1 S4) public string[] Split(string[] separator, StringSplitOptions options)
9 n! e2 K/ m/ N8 s5) public string[] Split(char[] separator, int count, StringSplitOptions options)
6) public string[] Split(string[] separator, int count, StringSplitOptions options)
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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
" O# x/ K. l# V1 sstring[] split = words.Split(new Char[] { ',' });//返回:{"1","2.3","","4"}
2 s$ c0 a' b0 V  @2 T. S+ Astring[] split = words.Split(new Char[] { ',', '.' });//返回:{"1","2","3","","4"}

2. public string[] Split(char[] separator, int count)

3 }: i' \. D, c 程序代码
2 B  q' K# S! A6 rstring[] split = words.Split(new Char[] { ',', '.' }, 2);//返回:{"1","2.3,,4"}
# c* K. L* ]. |  s% xstring[] split = words.Split(new Char[] { ',', '.' }, 6);//返回:{"1","2","3","","4"}

3. public string[] Split(char[] separator, StringSplitOptions options)
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程序代码
string[] split = words.Split(new Char[] { ',', '.' }, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2","3","4"} 不保留空元素
8 w! Y: u. B: K0 m  r  jstring[] 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)

7 R1 I) t8 I2 O 程序代码
string[] split = words.Split(new string[] { ",", "." }, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2","3","4"} 不保留空元素
. i6 _# v9 r3 N/ q, Nstring[] split = words.Split(new string[] { ",", "." }, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素
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6 x& K' |  a) y7 C, s5. public string[] Split(char[] separator, int count, StringSplitOptions options)
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7 P6 x1 _+ e0 |5 L" R 程序代码
string[] split = words.Split(new Char[] { ',', '.' }, 2, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2.3,,4"} 不保留空元素
/ [/ |& P0 }+ o1 g; x% A+ t1 Qstring[] split = words.Split(new Char[] { ',', '.' }, 6, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素

0 Z9 |* i9 o$ t, z% B6. public string[] Split(string[] separator, int count, StringSplitOptions options)

代码
+ S, e# S& u% p$ Sstring[] 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