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

5 v2 M3 K+ U  y& H/ p/ o8 D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

& ?, y5 d* l6 Y. s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
http://www.itwis.com/html/net/c/20100506/8234.html
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/ \# Y6 M5 y5 o: F4 y! _1) public string[] Split(params char[] separator)
4 [: G6 j* S) p+ g2) public string[] Split(char[] separator, int count)
$ T0 G% ?6 q& W" @0 T8 r3) public string[] Split(char[] separator, StringSplitOptions options)
  K$ x% _0 m# x# N4) 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)
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6 U. T, i6 T  o( q; y" ~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";)：

5 e* }5 h4 j* I4 P1. public string[] Split(params char[] separator)
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程序代码
string[] split = words.Split(new Char[] { ',' });//返回:{"1","2.3","","4"}
# x! |! k2 ~* |- A  Jstring[] split = words.Split(new Char[] { ',', '.' });//返回:{"1","2","3","","4"}

8 t# F! k! {& ?2. public string[] Split(char[] separator, int count)

程序代码
4 J! T/ e1 T7 I3 i+ |* h5 f1 t, y( astring[] split = words.Split(new Char[] { ',', '.' }, 2);//返回:{"1","2.3,,4"}
- w( d" W1 z8 J" fstring[] split = words.Split(new Char[] { ',', '.' }, 6);//返回:{"1","2","3","","4"}

3. public string[] Split(char[] separator, StringSplitOptions options)

程序代码
string[] split = words.Split(new Char[] { ',', '.' }, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2","3","4"} 不保留空元素
2 [( O2 v) T" o7 fstring[] 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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/ i+ N" X( x* [& d5 h+ w 程序代码
string[] split = words.Split(new string[] { ",", "." }, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2","3","4"} 不保留空元素
/ o; }: f  U! R3 f7 O& r2 Fstring[] split = words.Split(new string[] { ",", "." }, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素

# H5 }* ?" `# X6 T5. public string[] Split(char[] separator, int count, StringSplitOptions options)

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
( A" S* A2 Z# N$ rstring[] split = words.Split(new Char[] { ',', '.' }, 6, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素

* S& w' P1 E  j& S6. public string[] Split(string[] separator, int count, StringSplitOptions options)

" x6 T( {2 L- K) T; J) w( z4 T代码
9 r4 D$ j9 h& s. u, }! Dstring[] 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