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

5 b7 @% Z! _7 ]6 h5 r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
! g" s% P3 }$ z) 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
7 n& j; \) P) P, }+ m: [http://www.itwis.com/html/net/c/20100506/8234.html
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& T! }4 a, x- Q* M2 d! I程序代码
1) public string[] Split(params char[] separator)
2) public string[] Split(char[] separator, int count)
/ F8 ~" l. ~; e. Z- O/ f3) public string[] Split(char[] separator, StringSplitOptions options)
% X! g2 j* X% h3 D4 W4) public string[] Split(string[] separator, StringSplitOptions options)
" y7 e9 l! ?1 q" K. D+ N0 `  O5) public string[] Split(char[] separator, int count, StringSplitOptions options)
9 _& I; I( K; g) g$ H+ n6 [$ c; C6) public string[] Split(string[] separator, int count, StringSplitOptions options)

* K9 k! }! a  f; U6 n1 x- L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";)：

1. public string[] Split(params char[] separator)

# c: l4 O0 n1 Q9 `8 |! M. U& s 程序代码
+ P1 o% L3 H8 y1 x2 r. pstring[] split = words.Split(new Char[] { ',' });//返回:{"1","2.3","","4"}
string[] split = words.Split(new Char[] { ',', '.' });//返回:{"1","2","3","","4"}

2. public string[] Split(char[] separator, int count)
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7 @- H6 g- w8 C 程序代码
# E9 W% _7 d# X; r' Ustring[] split = words.Split(new Char[] { ',', '.' }, 2);//返回:{"1","2.3,,4"}
3 @+ l7 C7 y( Q/ ~+ A0 ?. y$ pstring[] split = words.Split(new Char[] { ',', '.' }, 6);//返回:{"1","2","3","","4"}

: d$ C; y1 N, m' C$ d$ W& M3. public string[] Split(char[] separator, StringSplitOptions options)

程序代码
9 Q3 R8 y, {9 A9 ]string[] split = words.Split(new Char[] { ',', '.' }, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2","3","4"} 不保留空元素
- d3 Z4 m. R4 }2 n% Vstring[] split = words.Split(new Char[] { ',', '.' }, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素
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, H5 Y* y1 ?2 x+ C' h  S% }4. public string[] Split(string[] separator, StringSplitOptions options)

$ S+ J, v' A) S3 Z$ Z+ ]) N 程序代码
( q; `8 E# h: ]1 Fstring[] split = words.Split(new string[] { ",", "." }, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2","3","4"} 不保留空元素
5 V" d+ h" W- Q4 s$ tstring[] split = words.Split(new string[] { ",", "." }, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素
6 d8 |9 R( o0 u; x  s- Q
5. public string[] Split(char[] separator, int count, StringSplitOptions options)

. j6 a( W5 w  r! r  D 程序代码
  q6 g3 R# P+ X+ |; g" Mstring[] 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)

; V0 z: T* D! w; i7 U, @& @" ^8 m2 Y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