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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: D% c! c2 ]9 G6 H4 s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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/ G' Y* }$ s) |7 u- {6 V: D5 [6 a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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5 h$ X! e2 t; H2 p1) public string[] Split(params char[] separator)
% Z. h2 o, h* m9 c2) public string[] Split(char[] separator, int count)
% i" f( O3 f, x& V( n$ z* c3) public string[] Split(char[] separator, StringSplitOptions options)
3 i6 ?1 b2 x2 `6 Q/ E4) public string[] Split(string[] separator, StringSplitOptions options)
$ R3 ?' m4 v" W' s* a5) public string[] Split(char[] separator, int count, StringSplitOptions options)
# H9 p4 }: e) A2 E# D6) 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)

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string[] split = words.Split(new Char[] { ',' });//返回:{"1","2.3","","4"}
% c6 \+ d1 [! Ostring[] split = words.Split(new Char[] { ',', '.' });//返回:{"1","2","3","","4"}

2. public string[] Split(char[] separator, int count)
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程序代码
' `. b" L, a9 I# N' m9 e( astring[] split = words.Split(new Char[] { ',', '.' }, 2);//返回:{"1","2.3,,4"}
% I+ q& ^, ^4 V& a+ Y) S: _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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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

4. public string[] Split(string[] separator, StringSplitOptions options)
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+ r$ s, P1 `2 e1 c6 b# q; xstring[] 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

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

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7 F, P7 Z3 [: B% O3 istring[] 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

3 n* m6 O' r& V6 Y- {6. public string[] Split(string[] separator, int count, StringSplitOptions options)
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0 {4 J  E9 e2 k7 B( E8 dstring[] split = words.Split(new string[] { ",", "." }, 2, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2.3,,4"} 不保留空元素
; f. l! n! d: ?6 H- T. p) gstring[] split = words.Split(new string[] { ",", "." }, 6, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素