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
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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
9 R$ d7 t' q* |; p3 U2 T# h/ F) lhttp://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
3 i7 N2 ]+ [& k/ l" mhttp://www.itwis.com/html/net/c/20100506/8234.html
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) @" T& v8 h8 Z) `0 m, t9 e& O程序代码
" }; L5 I6 p. q( a5 Y* I! d1) public string[] Split(params char[] separator)
2) public string[] Split(char[] separator, int count)
9 `- k& s7 V4 |3) public string[] Split(char[] separator, StringSplitOptions options)
4) public string[] Split(string[] separator, StringSplitOptions options)
6 }+ m7 r  O( W/ J# A5) public string[] Split(char[] separator, int count, StringSplitOptions options)
" [/ I# N. o2 d6) public string[] Split(string[] separator, int count, StringSplitOptions options)
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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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1. public string[] Split(params char[] separator)
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1 G! e1 o, k- v& w 程序代码
) G3 g, d: F! M# M- Mstring[] split = words.Split(new Char[] { ',' });//返回:{"1","2.3","","4"}
7 R! s0 w: p; `6 |7 l+ k3 {string[] split = words.Split(new Char[] { ',', '.' });//返回:{"1","2","3","","4"}
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$ X0 W# I1 K8 b( e2. public string[] Split(char[] separator, int count)

程序代码
3 Q6 L0 J% @! \; }string[] split = words.Split(new Char[] { ',', '.' }, 2);//返回:{"1","2.3,,4"}
0 ~) e0 e; l$ z  Istring[] split = words.Split(new Char[] { ',', '.' }, 6);//返回:{"1","2","3","","4"}
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$ v6 G1 R8 j6 c1 s0 ~. L) C# @1 c3. public string[] Split(char[] separator, StringSplitOptions options)

程序代码
8 C! P- f# Q" M) Fstring[] 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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4. public string[] Split(string[] separator, StringSplitOptions options)

程序代码
string[] split = words.Split(new string[] { ",", "." }, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2","3","4"} 不保留空元素
" \! \( S6 w8 o) ]$ P$ astring[] 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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* C( p: A- Q, {: r7 ^, | 程序代码
, d) X. \# N& jstring[] 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)
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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