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

4 U$ a- t9 H1 o0 P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
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
: u" t* \: w4 ~8 V  u) z5 P5 dhttp://www.itwis.com/html/net/c/20100506/8234.html
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6 c. y2 W; a7 c. s6 r3 [7 y5 w# F% W程序代码
- @$ W' x6 Z' Z- s: J- C7 p1) public string[] Split(params char[] separator)
- r( t- L9 a- `& X2) public string[] Split(char[] separator, int count)
0 v) y" h2 ^: i3) public string[] Split(char[] separator, StringSplitOptions options)
4) public string[] Split(string[] separator, StringSplitOptions options)
5) public string[] Split(char[] separator, int count, StringSplitOptions options)
6) public string[] Split(string[] separator, int count, StringSplitOptions options)

! {" [/ {" {0 a* i9 F- [3 A2 m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";)：

* {0 W! ]6 t+ o7 W+ k. B3 N1. public string[] Split(params char[] separator)

5 b4 M, @+ j" }; @% P3 l# S& h9 ` 程序代码
string[] split = words.Split(new Char[] { ',' });//返回:{"1","2.3","","4"}
string[] split = words.Split(new Char[] { ',', '.' });//返回:{"1","2","3","","4"}

% r4 P& T# t2 `: U- o% e, f* R2. public string[] Split(char[] separator, int count)

' V$ }! a- u/ l  h1 D0 N9 a$ ? 程序代码
3 p. n5 s  K( |2 wstring[] split = words.Split(new Char[] { ',', '.' }, 2);//返回:{"1","2.3,,4"}
" T4 ]# s5 C! ?string[] split = words.Split(new Char[] { ',', '.' }, 6);//返回:{"1","2","3","","4"}
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$ @* ~7 s$ B) b$ S+ n3 R3. public string[] Split(char[] separator, StringSplitOptions options)

" Y) N8 ^- E8 N  t9 T# \ 程序代码
3 a/ o# R- P; D- ?7 r! }) w% |$ s' pstring[] split = words.Split(new Char[] { ',', '.' }, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2","3","4"} 不保留空元素
6 G. Q) `, Y  ?8 `6 x2 l8 X4 v" jstring[] 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
string[] split = words.Split(new string[] { ",", "." }, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2","3","4"} 不保留空元素
1 i7 o8 V9 L7 O' zstring[] 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
' q* n" O. m( m9 t( I( j, rstring[] split = words.Split(new Char[] { ',', '.' }, 2, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2.3,,4"} 不保留空元素
5 X9 A! W0 Y$ Wstring[] split = words.Split(new Char[] { ',', '.' }, 6, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素
4 N8 R* A7 v" o9 U
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