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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1 ~: k* I: L4 i6 }! h* O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
http://www.itwis.com/html/net/c/20100506/8234.html

程序代码
1) public string[] Split(params char[] separator)
2) public string[] Split(char[] separator, int count)
* f: C+ D5 k: {$ ~) t* W: q5 G3) public string[] Split(char[] separator, StringSplitOptions options)
" z& @2 w' {6 x6 a; x. ~$ r4) public string[] Split(string[] separator, StringSplitOptions options)
5) public string[] Split(char[] separator, int count, StringSplitOptions options)
  y9 r6 T& Q! S3 ^6) 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)

程序代码
5 J& P, X' G: h8 S) `string[] split = words.Split(new Char[] { ',' });//返回:{"1","2.3","","4"}
string[] split = words.Split(new Char[] { ',', '.' });//返回:{"1","2","3","","4"}

: Z8 n& l3 _; G0 H% H; P9 A# F, i7 P2. public string[] Split(char[] separator, int count)
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% O1 K  m( `, t2 l" F: B& Y( c9 j4 ystring[] 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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- ~  ^& q4 s' H- |) D! k9 Y3. public string[] Split(char[] separator, StringSplitOptions options)

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" q$ e/ ?$ g* j5 [6 U: S4 Gstring[] split = words.Split(new Char[] { ',', '.' }, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2","3","4"} 不保留空元素
# v6 [* }, {$ k6 j  p+ B6 H3 ?string[] split = words.Split(new Char[] { ',', '.' }, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素
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, u, I. e5 \" ]* v+ b. h6 {4. public string[] Split(string[] separator, StringSplitOptions options)

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2 A. L& J. Z) }. 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

/ s1 L2 d% c# u) @$ [4 l5. public string[] Split(char[] separator, int count, StringSplitOptions options)
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程序代码
* o. W+ r" |- ~' W5 t; c1 D  ^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, x/ m7 w; p. t% |1 a6. public string[] Split(string[] separator, int count, StringSplitOptions options)

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& n$ D2 `; _- s+ gstring[] split = words.Split(new string[] { ",", "." }, 2, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2.3,,4"} 不保留空元素
" M, p7 G. l9 B" t% g+ Ustring[] split = words.Split(new string[] { ",", "." }, 6, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素