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 L/ p3 V! ^# D- g" X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
. |1 L7 m1 H1 C' D/ v9 y) Uhttp://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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程序代码
1) public string[] Split(params char[] separator)
2 F3 M8 o3 L, o3 B2) public string[] Split(char[] separator, int count)
3) public string[] Split(char[] separator, StringSplitOptions options)
: X: a7 x6 V/ t; S  l  l4) public string[] Split(string[] separator, StringSplitOptions options)
: B- t( j( B, C1 v9 D" |5) public string[] Split(char[] separator, int count, StringSplitOptions options)
: f) g- I/ f/ j4 n2 u( Q6) public string[] Split(string[] separator, int count, StringSplitOptions options)

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
string[] split = words.Split(new Char[] { ',' });//返回:{"1","2.3","","4"}
. P3 S2 F* U! @1 X. y. Astring[] split = words.Split(new Char[] { ',', '.' });//返回:{"1","2","3","","4"}

/ G1 a6 `9 c  C9 I% o4 d2 F) e2. public string[] Split(char[] separator, int count)
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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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+ r% m2 O6 H, Z+ Q3. 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
string[] split = words.Split(new Char[] { ',', '.' }, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素

4 u4 U; ^- T* a8 g4. 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
' Q  q4 O) Y: ~- xstring[] split = words.Split(new string[] { ",", "." }, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素
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$ `8 N: s! E! b; }$ v; U( R# O5. public string[] Split(char[] separator, int count, StringSplitOptions options)

3 X& K6 X! u7 U' O3 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
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: n; t' T+ T3 [$ G; D. ^: _6. public string[] Split(string[] separator, int count, StringSplitOptions options)

代码
& \9 a3 t/ @$ n2 wstring[] 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