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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' _  Z' W$ n' ?& h9 _; F0 J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

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
& }% k6 l, k0 g2 l. s+ B- C; qhttp://www.itwis.com/html/net/c/20100506/8234.html

程序代码
% @+ x0 _1 u& {- Q! U9 R2 |- E1) public string[] Split(params char[] separator)
2) public string[] Split(char[] separator, int count)
2 Z, @; N8 k1 R+ u( Y5 D7 F" [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)
; C: J7 F% p2 M& d6) public string[] Split(string[] separator, int count, StringSplitOptions options)

4 p- m; D4 }1 M% n$ P3 G/ O* y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";)：

' f) V$ v/ G# K3 t6 D7 g1. public string[] Split(params char[] separator)

程序代码
: I9 [$ U7 Z0 U9 @% kstring[] split = words.Split(new Char[] { ',' });//返回:{"1","2.3","","4"}
& b8 z( |3 z8 S6 e4 F! p1 Nstring[] split = words.Split(new Char[] { ',', '.' });//返回:{"1","2","3","","4"}

* S0 a  y9 `) ~: b8 Z2. public string[] Split(char[] separator, int count)

程序代码
string[] 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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$ B% L( _1 L: o" ?6 ?8 K  I  e* l3. public string[] Split(char[] separator, StringSplitOptions options)
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+ Q1 Q/ G  e! m6 g0 q  s 程序代码
, o4 f: D& S2 k. ?5 m# hstring[] 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)
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程序代码
string[] split = words.Split(new string[] { ",", "." }, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2","3","4"} 不保留空元素
  S$ J, }0 Q5 V% R$ Gstring[] split = words.Split(new string[] { ",", "." }, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素

! Z# ?; r+ w4 Y. E% A; \5. public string[] Split(char[] separator, int count, StringSplitOptions options)

" W, j' S% D7 B$ u$ e 程序代码
( a, b& ]4 r- C7 @1 L5 @: W9 f$ Qstring[] split = words.Split(new Char[] { ',', '.' }, 2, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2.3,,4"} 不保留空元素
string[] split = words.Split(new Char[] { ',', '.' }, 6, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素

( o. m. U* z% S# B, {6. public string[] Split(string[] separator, int count, StringSplitOptions options)

! L* s: K7 c' x, G8 M代码
string[] split = words.Split(new string[] { ",", "." }, 2, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2.3,,4"} 不保留空元素
) P/ T4 N4 N, ^& `  c0 B8 Ustring[] split = words.Split(new string[] { ",", "." }, 6, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素