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

& \+ ~0 ?: ]& l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
- a: `6 \* U' ]( Rhttp://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
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$ M( c( b+ Y# Y. U9 {6 V, ?" w4 h0 R程序代码
/ g9 q: [: l* J/ r/ ^& g1) public string[] Split(params char[] separator)
, {. p% }0 r% R" t# n/ A' Y/ O2) public string[] Split(char[] separator, int count)
! ]0 L4 p- o% M( {3 g0 W3) public string[] Split(char[] separator, StringSplitOptions options)
4) public string[] Split(string[] separator, StringSplitOptions options)
% v: |* \# @9 v. L( L7 j+ u5) public string[] Split(char[] separator, int count, StringSplitOptions options)
8 Z( }5 Z* T: P7 e* f7 {# L3 H* 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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& m* D  p6 c- c5 X- o4 W1. public string[] Split(params char[] separator)

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string[] split = words.Split(new Char[] { ',' });//返回:{"1","2.3","","4"}
string[] split = words.Split(new Char[] { ',', '.' });//返回:{"1","2","3","","4"}

2 Z# i0 G0 Y) X2. public string[] Split(char[] separator, int count)
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程序代码
1 r- V1 v" b, p. Rstring[] 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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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
  d+ L/ [% t0 a' ^" {string[] split = words.Split(new Char[] { ',', '.' }, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素
6 l/ N' ^$ \2 I( ?0 A7 f1 Q% g. F$ e
' L2 {, w! j# {8 Y. m; Q4. public string[] Split(string[] separator, StringSplitOptions options)
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$ D# K3 y( K0 n" l* c3 e7 {, ~, E3 a) J 程序代码
, \; `4 I4 Z" F! |9 R3 Astring[] split = words.Split(new string[] { ",", "." }, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2","3","4"} 不保留空元素
( D1 X+ @3 ~+ H- Kstring[] split = words.Split(new string[] { ",", "." }, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素
1 H2 o& F5 C: v) P" ]
& R: ~1 p) t& L" P8 h5. 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
string[] split = words.Split(new Char[] { ',', '.' }, 6, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素

; R% K/ ^' |5 X6 `0 X6 u+ V6. public string[] Split(string[] separator, int count, StringSplitOptions options)

代码
* G3 L/ U# T: T, D% z+ Jstring[] 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