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

  X% s& W0 e% v) x4 \* F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
4 F3 C; j3 {( _/ O, Qhttp://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

7 D9 Q% z$ i5 [  x! G程序代码
& y3 m- H6 C4 p" N1) public string[] Split(params char[] separator)
9 c* u0 h5 `7 J7 @# B2) public string[] Split(char[] separator, int count)
& A% ]! j+ G8 A9 M3) 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)
* x- G! V6 Y1 t& y1 f6) 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";)：

3 q5 c6 o* @6 R- R1. public string[] Split(params char[] separator)

程序代码
, h# }$ \; Y2 _6 E# f. G; N( e# }string[] split = words.Split(new Char[] { ',' });//返回:{"1","2.3","","4"}
6 }& I% ^: G; Sstring[] split = words.Split(new Char[] { ',', '.' });//返回:{"1","2","3","","4"}
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2. public string[] Split(char[] separator, int count)

程序代码
# B4 c: X" x8 t$ Ustring[] 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 X3 }2 v3 |: }" n3. 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
; c, S) c/ o0 L( b7 s1 Cstring[] split = words.Split(new Char[] { ',', '.' }, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素

2 @: S! I8 c% q5 |1 p# {' f; K4. public string[] Split(string[] separator, StringSplitOptions options)
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* a) M9 X  q5 d  |' Y0 Q8 u 程序代码
5 f/ m+ G& x+ y* astring[] 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

5. public string[] Split(char[] separator, int count, StringSplitOptions options)
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程序代码
$ l# f) g2 b9 Z. H. o" qstring[] split = words.Split(new Char[] { ',', '.' }, 2, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2.3,,4"} 不保留空元素
% i! [- l* n+ O6 Pstring[] split = words.Split(new Char[] { ',', '.' }, 6, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素
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/ Z9 W7 X6 g$ }! v- K6. public string[] Split(string[] separator, int count, StringSplitOptions options)
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, T+ l. Z+ z/ J1 H3 `' _代码
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