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

0 J3 m/ L. }4 [* d: ]& I& 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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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
8 ~6 \! T: j" ?( @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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程序代码
+ l  M' I0 q1 B! F7 y; p5 y8 {1) public string[] Split(params char[] separator)
: l' j9 N/ f1 u, M2) public string[] Split(char[] separator, int count)
1 t+ ]% ^' m8 n3) public string[] Split(char[] separator, StringSplitOptions options)
, w& ]6 r6 S2 L  q8 h4) public string[] Split(string[] separator, StringSplitOptions options)
& _2 R' a! q% U2 F  O. J5) public string[] Split(char[] separator, int count, StringSplitOptions options)
' e1 i" L: L  U. D. ^6) public string[] Split(string[] separator, int count, StringSplitOptions options)

* n: ], [# @/ Y/ 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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4 V" t# J' }8 z, Hstring[] split = words.Split(new Char[] { ',' });//返回:{"1","2.3","","4"}
9 [' |1 Q* F& X1 |string[] split = words.Split(new Char[] { ',', '.' });//返回:{"1","2","3","","4"}

2 u7 I; ^) ~" E- S& `# {2. public string[] Split(char[] separator, int count)

程序代码
string[] split = words.Split(new Char[] { ',', '.' }, 2);//返回:{"1","2.3,,4"}
string[] split = words.Split(new Char[] { ',', '.' }, 6);//返回:{"1","2","3","","4"}
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7 g1 K, p2 @) z( u1 H3. 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

. H7 v" `0 {3 _4. public string[] Split(string[] separator, StringSplitOptions options)
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程序代码
  Z1 F0 m: w7 n! e0 j* j+ ~( 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
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5. public string[] Split(char[] separator, int count, StringSplitOptions options)
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程序代码
  n+ u' M" N/ c" h5 _; C: C3 U: Ustring[] 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

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

5 w3 S' D9 d& }' B1 r代码
5 D; E1 T" c* C8 L& G7 f- Ostring[] 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