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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1 G7 e" {5 [$ U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
* E) |) x; m) Z. Nhttp://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)
2) public string[] Split(char[] separator, int count)
8 F  \; P: }& `, l$ q& m: y- f3) public string[] Split(char[] separator, StringSplitOptions options)
. J* [% k/ T0 w, {6 Q2 \4) public string[] Split(string[] separator, StringSplitOptions options)
; v; \0 t- W) ~1 E- V0 q- v" [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";)：
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1. public string[] Split(params char[] separator)
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) O6 j. I# Q0 O; D+ Kstring[] split = words.Split(new Char[] { ',' });//返回:{"1","2.3","","4"}
7 N) I, S' _5 W3 \string[] split = words.Split(new Char[] { ',', '.' });//返回:{"1","2","3","","4"}
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2. public string[] Split(char[] separator, int count)

程序代码
7 b$ |: C* Z, Sstring[] split = words.Split(new Char[] { ',', '.' }, 2);//返回:{"1","2.3,,4"}
  f, [! [- Q! k1 D* A" H" }string[] split = words.Split(new Char[] { ',', '.' }, 6);//返回:{"1","2","3","","4"}
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3. public string[] Split(char[] separator, StringSplitOptions options)
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程序代码
" \1 e+ [4 B' u, F, Z$ T: nstring[] split = words.Split(new Char[] { ',', '.' }, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2","3","4"} 不保留空元素
0 _9 @$ |/ r7 R0 i# Qstring[] 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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string[] split = words.Split(new string[] { ",", "." }, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2","3","4"} 不保留空元素
" e, ?* n7 a6 @- ystring[] split = words.Split(new string[] { ",", "." }, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素
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! x9 [9 h- E& A3 p. P' Q5. public string[] Split(char[] separator, int count, StringSplitOptions options)

  N+ S( t# z# u  F- s! _" s 程序代码
7 V# p& n$ a  Q& }4 P& wstring[] split = words.Split(new Char[] { ',', '.' }, 2, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2.3,,4"} 不保留空元素
$ Q4 e* G3 z+ ^( x) Vstring[] 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)
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8 C/ v* R5 B! ?1 o6 @/ I2 j+ jstring[] split = words.Split(new string[] { ",", "." }, 2, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2.3,,4"} 不保留空元素
8 M+ y; y  l5 ^7 Z7 G  |  Xstring[] split = words.Split(new string[] { ",", "." }, 6, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素