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

" a5 u7 J. h* v6 s5 s' S8 W- r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
, ?5 ~# {* [1 ?% ]7 b4 }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
4 Q# E# ?& P8 P9 bhttp://www.itwis.com/html/net/c/20100506/8234.html
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程序代码
* u0 n5 r  I. N% i- R& `+ D7 v1) public string[] Split(params char[] separator)
2) public string[] Split(char[] separator, int count)
3) public string[] Split(char[] separator, StringSplitOptions options)
3 h8 q; t* u0 c2 d1 z5 A, k4) 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)

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";)：

1. public string[] Split(params char[] separator)

" O& g+ r: E% t. D- p$ w 程序代码
string[] split = words.Split(new Char[] { ',' });//返回:{"1","2.3","","4"}
  h/ b5 n: o$ \' W) p- Gstring[] split = words.Split(new Char[] { ',', '.' });//返回:{"1","2","3","","4"}

# {0 x1 a1 G% q" y/ @2. public string[] Split(char[] separator, int count)

, ^4 r8 t1 |3 s1 v: T+ ~' w 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"}

( d  b2 F3 M. i! z) m3. 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
4 ?9 K8 `) P5 U8 R5 i' k  I) Rstring[] split = words.Split(new Char[] { ',', '.' }, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素

4. 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
string[] split = words.Split(new string[] { ",", "." }, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素
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% r- C6 n% y' w, z  W3 ?5. public string[] Split(char[] separator, int count, StringSplitOptions options)

0 i+ o5 w) _! q) k 程序代码
: o- Q/ p$ M* n9 f# `string[] split = words.Split(new Char[] { ',', '.' }, 2, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2.3,,4"} 不保留空元素
7 N2 h" m4 z+ B- e6 Xstring[] split = words.Split(new Char[] { ',', '.' }, 6, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素

6. public string[] Split(string[] separator, int count, StringSplitOptions options)

代码
  L  @- G0 s& V% `' Zstring[] 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