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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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
( \' y; T+ F: w( Whttp://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
2 q; E" @; k. m  s: l% n. X3 ^1) public string[] Split(params char[] separator)
% y& a* @! W  ~) }2) public string[] Split(char[] separator, int count)
. R: W) v& V8 S: s3) public string[] Split(char[] separator, StringSplitOptions options)
6 D* ~: ?/ a# s* \3 }% ]% G, ^4) public string[] Split(string[] separator, StringSplitOptions options)
/ L. o! U+ x8 _2 R. G- K5) public string[] Split(char[] separator, int count, StringSplitOptions options)
; X% r6 H4 }3 j$ y6) public string[] Split(string[] separator, int count, StringSplitOptions options)

4 w- f) G3 L* u; I/ i- _  a/ A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)
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程序代码
4 M0 q7 i1 }# {+ e0 k* o$ E4 [string[] split = words.Split(new Char[] { ',' });//返回:{"1","2.3","","4"}
/ y: {# V8 {1 jstring[] split = words.Split(new Char[] { ',', '.' });//返回:{"1","2","3","","4"}

% A; P" z: T! |- u- ?2. public string[] Split(char[] separator, int count)
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程序代码
string[] split = words.Split(new Char[] { ',', '.' }, 2);//返回:{"1","2.3,,4"}
- ?! L, m6 `, h3 V; a, ~string[] split = words.Split(new Char[] { ',', '.' }, 6);//返回:{"1","2","3","","4"}
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; O/ m6 O6 Q. l* q  \3. 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
string[] split = words.Split(new Char[] { ',', '.' }, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素
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( b+ p8 S% N! L+ X4. public string[] Split(string[] separator, StringSplitOptions options)
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7 Z, f" W. H/ R- H* U* hstring[] split = words.Split(new string[] { ",", "." }, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2","3","4"} 不保留空元素
4 `0 S' |1 s% w, X- n, `+ sstring[] split = words.Split(new string[] { ",", "." }, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素

0 k+ K8 G# k! r* V% q4 J5. public string[] Split(char[] separator, int count, StringSplitOptions options)
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程序代码
8 l; |) J2 S$ C( sstring[] 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

+ T; k/ O! g6 O' K  w4 q6. public string[] Split(string[] separator, int count, StringSplitOptions options)
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代码
6 a% Z, }* e) h3 Nstring[] split = words.Split(new string[] { ",", "." }, 2, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2.3,,4"} 不保留空元素
  D8 \2 W( z/ d! Astring[] split = words.Split(new string[] { ",", "." }, 6, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素