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

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

( M  w1 X& S3 v1 H1 s4 h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
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程序代码
1) public string[] Split(params char[] separator)
2) public string[] Split(char[] separator, int count)
3) public string[] Split(char[] separator, StringSplitOptions options)
1 z9 N7 }3 V7 Z& U* f  ^  n4) public string[] Split(string[] separator, StringSplitOptions options)
& y; B2 M. |8 }: L8 M+ B5) public string[] Split(char[] separator, int count, StringSplitOptions options)
6) public string[] Split(string[] separator, int count, StringSplitOptions options)

% x0 i+ K4 m4 _* ~  I8 X9 S" ~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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& c/ [& H+ f1 a& v( {8 R0 Mstring[] split = words.Split(new Char[] { ',' });//返回:{"1","2.3","","4"}
2 q! R' a. Y' v, B8 A0 B3 rstring[] split = words.Split(new Char[] { ',', '.' });//返回:{"1","2","3","","4"}

2. public string[] Split(char[] separator, int count)

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string[] split = words.Split(new Char[] { ',', '.' }, 2);//返回:{"1","2.3,,4"}
( @$ A: u: D! J* \3 M# n% Gstring[] split = words.Split(new Char[] { ',', '.' }, 6);//返回:{"1","2","3","","4"}
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: M6 N) Q7 K: R5 ?3. public string[] Split(char[] separator, StringSplitOptions options)
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程序代码
1 \- ?" X2 N+ L3 R# H4 H8 qstring[] 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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程序代码
1 I; j) ?* v. K* @0 ?* Ustring[] 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

) \, s5 W; Q! }6 K" `5. public string[] Split(char[] separator, int count, StringSplitOptions options)

" I$ }. n: P% x2 R3 t 程序代码
# L1 \- n. B, Q  \6 k+ e* G' Vstring[] split = words.Split(new Char[] { ',', '.' }, 2, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2.3,,4"} 不保留空元素
8 V. b5 n2 \' l' _string[] 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)

代码
string[] split = words.Split(new string[] { ",", "." }, 2, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2.3,,4"} 不保留空元素
string[] split = words.Split(new string[] { ",", "." }, 6, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素