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

$ \5 w) G5 I: o$ w" I/ p+ Q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

/ I+ C% ?, Z/ n- a9 Q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
http://www.itwis.com/html/net/c/20100506/8234.html

程序代码
1) public string[] Split(params char[] separator)
- l# d8 q6 i3 b2) public string[] Split(char[] separator, int count)
3) public string[] Split(char[] separator, StringSplitOptions options)
7 F, G3 \0 O* N9 I! M! `% P! D4) public string[] Split(string[] separator, StringSplitOptions options)
9 {; g% E( G' D5) public string[] Split(char[] separator, int count, StringSplitOptions options)
, I. f# `7 |1 R( Q; j% |6) public string[] Split(string[] separator, int count, StringSplitOptions options)
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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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" g( V8 x$ Y* M5 w4 T+ c1. public string[] Split(params char[] separator)

程序代码
9 M' F, W; U9 H, u  i% [6 B+ e. mstring[] 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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! p  }! T% K  x. B) Q; K1 H: d( A2. public string[] Split(char[] separator, int count)

' u% P4 c6 ?( A# L0 X/ w( ^8 }7 R 程序代码
* z2 G3 ~6 i; U5 W/ R9 [  X1 bstring[] 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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# p: ~5 t  m% n) K3. public string[] Split(char[] separator, StringSplitOptions options)

9 b2 X6 x! A/ }# q 程序代码
2 h' a9 p' k* C5 P' Q$ Nstring[] split = words.Split(new Char[] { ',', '.' }, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2","3","4"} 不保留空元素
  V1 }- A# J7 g' X3 o: d; ~string[] 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
( f+ k+ {6 l" ~+ f' kstring[] 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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9 w. D- [& U( y4 q5. public string[] Split(char[] separator, int count, StringSplitOptions options)

程序代码
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

) s5 l4 J& c/ e5 C5 ~6. public string[] Split(string[] separator, int count, StringSplitOptions options)
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代码
string[] split = words.Split(new string[] { ",", "." }, 2, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2.3,,4"} 不保留空元素
( T4 w, V! T4 s$ A# A& B  _string[] split = words.Split(new string[] { ",", "." }, 6, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素