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

8 K9 o  l* i0 e3 k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
2 W2 k" z+ J- \- b" Q' k1) public string[] Split(params char[] separator)
/ v9 v9 _  S3 x( c. ^6 [2) public string[] Split(char[] separator, int count)
3) public string[] Split(char[] separator, StringSplitOptions options)
( U! X1 x( c; J2 Q4 L4) 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)

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 S# W0 a$ g" J1 x" Y1. 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"}
string[] split = words.Split(new Char[] { ',', '.' });//返回:{"1","2","3","","4"}
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2. public string[] Split(char[] separator, int count)
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string[] split = words.Split(new Char[] { ',', '.' }, 2);//返回:{"1","2.3,,4"}
# r0 `$ n; T# R( V- Estring[] split = words.Split(new Char[] { ',', '.' }, 6);//返回:{"1","2","3","","4"}
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) L( ?9 Y4 g; o7 O5 {/ Q, R+ l. [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
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)
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& q* ?' z- O+ {: u0 Q( Astring[] split = words.Split(new string[] { ",", "." }, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2","3","4"} 不保留空元素
6 l, U, J/ x$ O, H+ gstring[] split = words.Split(new string[] { ",", "." }, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素

2 f0 n* m; O% a* Y5. 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
+ W3 I1 Y: T, {. ^* n3 e' Jstring[] split = words.Split(new Char[] { ',', '.' }, 6, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素
0 f% W, w. ~2 `
" e6 r( M, `8 M6. public string[] Split(string[] separator, int count, StringSplitOptions options)
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5 o9 u& t# x8 R7 S2 D% \) `string[] split = words.Split(new string[] { ",", "." }, 2, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2.3,,4"} 不保留空元素
" F6 w4 \$ `( Z% s  astring[] split = words.Split(new string[] { ",", "." }, 6, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素