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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: C5 l( ~9 r9 d, U# 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
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, \% `# b( R+ g) Q- U% O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
  M" R4 N6 i+ C; Z# a7 Phttp://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
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1) public string[] Split(params char[] separator)
2 O( O7 c/ `" u( [2) public string[] Split(char[] separator, int count)
$ S' O; |4 U) a: M& d3) 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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+ t) j9 g2 g; i( p2 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";)：
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0 t6 o% @5 u5 m' A8 T) w1 \0 ?1 i. a1. public string[] Split(params char[] separator)
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string[] split = words.Split(new Char[] { ',' });//返回:{"1","2.3","","4"}
string[] split = words.Split(new Char[] { ',', '.' });//返回:{"1","2","3","","4"}
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' n; I, f1 O1 L3 |2 s: ~2 h2. public string[] Split(char[] separator, int count)

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string[] split = words.Split(new Char[] { ',', '.' }, 2);//返回:{"1","2.3,,4"}
' k# p  |1 M( T5 z6 w# ^8 S5 Astring[] 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
" O" e4 l! D$ d6 t7 z1 \string[] 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

: Q. r" }0 h. k+ P# d; p4. public string[] Split(string[] separator, StringSplitOptions options)

程序代码
! \) b: `" x: M4 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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7 s& {- G" _& r- C8 N6 x( q5. public string[] Split(char[] separator, int count, StringSplitOptions options)
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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

( a% q; Y+ c8 q: F  b: @6. public string[] Split(string[] separator, int count, StringSplitOptions options)
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代码
1 U; r# t3 e6 B" }string[] split = words.Split(new string[] { ",", "." }, 2, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2.3,,4"} 不保留空元素
; S. ~$ o8 X8 k" Qstring[] split = words.Split(new string[] { ",", "." }, 6, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素