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

. E2 E" m6 |8 [( f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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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
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程序代码
1) public string[] Split(params char[] separator)
2) public string[] Split(char[] separator, int count)
; y, L  i7 t! l8 z3) public string[] Split(char[] separator, StringSplitOptions options)
  U+ N5 }- r0 t! W9 V7 O, S4) public string[] Split(string[] separator, StringSplitOptions options)
( k) ^' d7 q( Z$ s! [5 H: F5) public string[] Split(char[] separator, int count, StringSplitOptions options)
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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1. public string[] Split(params char[] separator)
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程序代码
string[] split = words.Split(new Char[] { ',' });//返回:{"1","2.3","","4"}
8 g2 C1 u( c$ R( l; B; Rstring[] split = words.Split(new Char[] { ',', '.' });//返回:{"1","2","3","","4"}

% N- V0 Q# \# y0 X: z  O2. public string[] Split(char[] separator, int count)

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, S5 p' ~/ u1 Z* M; v) ]8 i' Zstring[] split = words.Split(new Char[] { ',', '.' }, 2);//返回:{"1","2.3,,4"}
3 E1 P9 S7 l1 M8 k3 fstring[] split = words.Split(new Char[] { ',', '.' }, 6);//返回:{"1","2","3","","4"}

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

程序代码
string[] split = words.Split(new Char[] { ',', '.' }, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2","3","4"} 不保留空元素
8 Y* B' y' J6 I2 Nstring[] 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
9 f/ {- o3 ]) e& g/ D# Xstring[] split = words.Split(new string[] { ",", "." }, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素

1 {" J' y4 l5 N* e. \. z2 L5. public string[] Split(char[] separator, int count, StringSplitOptions options)
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程序代码
6 |  I$ @- N8 }& W  k) b# Fstring[] 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

$ g+ D& `3 h& L1 c5 c2 u6. public string[] Split(string[] separator, int count, StringSplitOptions options)
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: k" D+ ~+ W0 s7 r' L7 qstring[] split = words.Split(new string[] { ",", "." }, 2, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2.3,,4"} 不保留空元素
0 z# E6 `' x1 M' N3 k- e7 mstring[] split = words.Split(new string[] { ",", "." }, 6, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素