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

3 ]$ W9 V% @1 {. j  U" v3 P  ?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
( ~1 U6 i+ M* R4 T. F9 [- A+ _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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1) public string[] Split(params char[] separator)
2) public string[] Split(char[] separator, int count)
3) public string[] Split(char[] separator, StringSplitOptions options)
# f$ k6 A4 @; `7 `& W5 {4) public string[] Split(string[] separator, StringSplitOptions options)
5) public string[] Split(char[] separator, int count, StringSplitOptions options)
# h$ m# W4 k0 y7 g6) public string[] Split(string[] separator, int count, StringSplitOptions options)
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5 V5 E* k: h& C. 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";)：

8 W* }7 t. ~' e8 z1. public string[] Split(params char[] separator)

程序代码
: ~' t. f) n. ]3 {' xstring[] split = words.Split(new Char[] { ',' });//返回:{"1","2.3","","4"}
$ \( b' T1 H, `* O" g' `% istring[] split = words.Split(new Char[] { ',', '.' });//返回:{"1","2","3","","4"}

; j) K& C5 a& B2 K/ k) q4 I8 H2. 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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3. public string[] Split(char[] separator, StringSplitOptions options)

7 b  d3 v0 S$ o5 h 程序代码
  x( S( Y0 G& W6 zstring[] split = words.Split(new Char[] { ',', '.' }, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2","3","4"} 不保留空元素
, Z, \( R* V. ^, O9 @/ V, @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
/ ?/ r" {& H" E  Ystring[] 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

4 e) W, A: \& n& _. _$ u1 W5. public string[] Split(char[] separator, int count, StringSplitOptions options)
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- i1 o! f4 r2 _: F' [2 U+ F+ Q 程序代码
string[] 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

& s  \# U- I" K( ~5 w/ d3 L6. public string[] Split(string[] separator, int count, StringSplitOptions options)
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代码
0 v* R+ Y1 d9 e- Y: ]: d: |5 J/ r7 C) T! Bstring[] 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