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
* {. I% _5 i. W: G% g# L3 S: dhttp://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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  \5 _0 p# B* ]程序代码
1 l- q' A* U9 J- I  X1 r4 F1) public string[] Split(params char[] separator)
$ j# |; F! A/ W5 t, l! }- P2) public string[] Split(char[] separator, int count)
3) public string[] Split(char[] separator, StringSplitOptions options)
4) public string[] Split(string[] separator, StringSplitOptions options)
+ T6 V- \6 O( ?5) public string[] Split(char[] separator, int count, StringSplitOptions options)
! e* a( o6 }) A* I# j6) public string[] Split(string[] separator, int count, StringSplitOptions options)

2 p" i4 T, e% D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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2 V; S& Q/ O& K  L6 |1 \1 g- h1. public string[] Split(params char[] separator)
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程序代码
# u8 A- Z8 \! G: M1 Astring[] split = words.Split(new Char[] { ',' });//返回:{"1","2.3","","4"}
string[] 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"}
& M- W' n* x, C6 g! \( Y  `" vstring[] split = words.Split(new Char[] { ',', '.' }, 6);//返回:{"1","2","3","","4"}
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* G7 ?* q. C$ C+ ?, g3. public string[] Split(char[] separator, StringSplitOptions options)
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程序代码
/ q  I" s* x, R2 f. N3 ?# l3 u8 @7 Vstring[] 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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$ x1 d# q& @# D' H- _% I4. public string[] Split(string[] separator, StringSplitOptions options)

程序代码
3 U2 K8 h& i* p) q! B7 astring[] split = words.Split(new string[] { ",", "." }, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2","3","4"} 不保留空元素
8 S& R2 }- v; ?$ ?3 E3 Rstring[] 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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: g3 U: o8 Q" T" A 程序代码
* `# X2 h% P5 c8 wstring[] split = words.Split(new Char[] { ',', '.' }, 2, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2.3,,4"} 不保留空元素
& C# r5 M: K; p& w7 |" l7 A7 p0 Lstring[] 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
6 f: F1 K+ ~1 v4 ^4 e( rstring[] 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