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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5 A  d; T- E8 Q  l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  Z7 f( X: c4 g* B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
1 ^2 L; X* a) y) b  [http://www.itwis.com/html/net/c/20100506/8234.html

程序代码
1) public string[] Split(params char[] separator)
2) public string[] Split(char[] separator, int count)
2 ~$ Y$ d9 ], Z+ \3) public string[] Split(char[] separator, StringSplitOptions options)
4) public string[] Split(string[] separator, StringSplitOptions options)
. X* n! b" \( c0 G9 v0 S5) public string[] Split(char[] separator, int count, StringSplitOptions options)
6) public string[] Split(string[] separator, int count, StringSplitOptions options)

0 |# ^3 S/ n4 C' S' K: ~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)

程序代码
string[] split = words.Split(new Char[] { ',' });//返回:{"1","2.3","","4"}
; B- G- v( k2 V% a7 D6 `; estring[] split = words.Split(new Char[] { ',', '.' });//返回:{"1","2","3","","4"}

7 j4 z9 r0 r* F) K! I2. public string[] Split(char[] separator, int count)
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程序代码
9 c. n8 G% y2 }: X' Y/ k! @+ ^string[] split = words.Split(new Char[] { ',', '.' }, 2);//返回:{"1","2.3,,4"}
2 f. {0 S! G4 v$ E/ \7 vstring[] split = words.Split(new Char[] { ',', '.' }, 6);//返回:{"1","2","3","","4"}

3. public string[] Split(char[] separator, StringSplitOptions options)

. o  i7 G+ w1 @$ k# Z& g1 L 程序代码
* N$ m# n2 ~. {+ W8 G' s0 T, kstring[] split = words.Split(new Char[] { ',', '.' }, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2","3","4"} 不保留空元素
7 e7 o/ c  P/ r' Lstring[] split = words.Split(new Char[] { ',', '.' }, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素
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  E/ A! j- J" }; `( y4. public string[] Split(string[] separator, StringSplitOptions options)

程序代码
string[] split = words.Split(new string[] { ",", "." }, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2","3","4"} 不保留空元素
" F, L% V( g0 ]* J9 ostring[] 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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* `0 `: {- f8 D  n" t' ~/ X; |2 k  b( z 程序代码
  h9 b3 h; D4 [* ~string[] 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
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* C; `) M  e1 C; {2 N5 R# h& l6. public string[] Split(string[] separator, int count, StringSplitOptions options)

代码
. H( z/ R$ _4 M8 P+ u! \0 P1 Estring[] split = words.Split(new string[] { ",", "." }, 2, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2.3,,4"} 不保留空元素
+ N4 \' @" G# |- ^string[] split = words.Split(new string[] { ",", "." }, 6, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素