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

7 r" [/ K  t/ r9 z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

, k$ R0 b- I& A$ X! _4 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
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
' r1 ~' n) A' Z0 Y# q" Whttp://www.itwis.com/html/net/c/20100506/8234.html

程序代码
6 N- A  Q# N& Y3 [. \1) public string[] Split(params char[] separator)
% L8 F# t2 R% q/ E" t' z2) 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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2 Z1 w# e- E9 z9 e) 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";)：

/ E. _( n) x$ @  c6 Z& `) q7 I1 [1. public string[] Split(params char[] separator)

程序代码
string[] split = words.Split(new Char[] { ',' });//返回:{"1","2.3","","4"}
4 u2 F9 y* G( w5 d  ostring[] split = words.Split(new Char[] { ',', '.' });//返回:{"1","2","3","","4"}
% {$ [% u9 L: V, A* Q
2. public string[] Split(char[] separator, int count)
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+ \! Y4 H! }* e" ~; \( z6 Y 程序代码
  o7 k& H( M4 K" Pstring[] split = words.Split(new Char[] { ',', '.' }, 2);//返回:{"1","2.3,,4"}
% z! `/ r/ j3 I: t- B& k. M& astring[] split = words.Split(new Char[] { ',', '.' }, 6);//返回:{"1","2","3","","4"}
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+ G* g$ ^& L: w  A. p2 d# A3. public string[] Split(char[] separator, StringSplitOptions options)

- D4 Q& O' y% z8 K0 ?  Q 程序代码
string[] split = words.Split(new Char[] { ',', '.' }, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2","3","4"} 不保留空元素
9 x3 E# P" s0 [( J' Q! G7 _; istring[] split = words.Split(new Char[] { ',', '.' }, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素

4 C. }4 f8 o7 T4. public string[] Split(string[] separator, StringSplitOptions options)

' {; L. D  q' E7 K5 ^8 e7 s) y9 R 程序代码
' a: x8 x- G/ H, N; Fstring[] 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
  S7 h& y" M5 d5 }2 b9 X& @9 Dstring[] split = words.Split(new Char[] { ',', '.' }, 2, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2.3,,4"} 不保留空元素
: P; j/ F/ R) @2 R+ K; A9 Kstring[] split = words.Split(new Char[] { ',', '.' }, 6, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素
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, v/ L3 U% B9 M0 h2 ?; n6. public string[] Split(string[] separator, int count, StringSplitOptions options)
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代码
9 n2 F: u  b6 Dstring[] split = words.Split(new string[] { ",", "." }, 2, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2.3,,4"} 不保留空元素
1 `; Y% J7 h; Ostring[] split = words.Split(new string[] { ",", "." }, 6, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素