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

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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2 `5 E7 F7 p9 _  \# Y( n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
" D( n8 U6 ], |0 r) q1 ~( P8 qhttp://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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' M. m9 _, _$ P7 r0 `+ G% p7 J程序代码
1) public string[] Split(params char[] separator)
2) public string[] Split(char[] separator, int count)
* `) l0 N& V7 }: {& \3) public string[] Split(char[] separator, StringSplitOptions options)
4) public string[] Split(string[] separator, StringSplitOptions options)
2 N3 s; Q  t! J) C5) public string[] Split(char[] separator, int count, StringSplitOptions options)
; B2 I# k9 q0 Y% u0 _/ R" i, f& n7 o6) 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";)：

% u0 W! r" C* I- ~, C! L. G, p1. public string[] Split(params char[] separator)

程序代码
2 D4 v( Z/ J$ ?8 x) O  P' k" lstring[] split = words.Split(new Char[] { ',' });//返回:{"1","2.3","","4"}
+ z4 z4 j* v) L8 mstring[] split = words.Split(new Char[] { ',', '.' });//返回:{"1","2","3","","4"}
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2. public string[] Split(char[] separator, int count)

程序代码
  N$ y; B; _% C. N+ Q5 |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"}

, C3 y* M- u. A- U6 D: Z# S3. public string[] Split(char[] separator, StringSplitOptions options)

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string[] split = words.Split(new Char[] { ',', '.' }, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2","3","4"} 不保留空元素
! ^/ h% ?0 m- istring[] split = words.Split(new Char[] { ',', '.' }, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素

$ O( ^, q8 i0 @7 A' A/ p3 S+ P4. public string[] Split(string[] separator, StringSplitOptions options)
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程序代码
string[] 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
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5. public string[] Split(char[] separator, int count, StringSplitOptions options)
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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
4 T- F# C. S$ Bstring[] split = words.Split(new Char[] { ',', '.' }, 6, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素

4 X4 H; D3 l& l6. public string[] Split(string[] separator, int count, StringSplitOptions options)

1 e: O/ ~$ u1 \7 O代码
8 Z+ a. Z. Z0 |# j( d( E3 b+ ^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