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标题: 升级程序开发——读Web.config、执行Sql脚本 [打印本页]

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作者: Star    时间: 2011-2-18 17:28
标题: 升级程序开发——读Web.config、执行Sql脚本
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

4 |: ~' E& R4 T5 H9 @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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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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作者: Star    时间: 2011-2-18 17:33
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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作者: Star    时间: 2011-2-18 17:37
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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程序代码
1 o8 r0 W  \6 M; u( U3 [1) public string[] Split(params char[] separator)
5 K; R# L" n1 |" F& V6 n2) public string[] Split(char[] separator, int count)
3) public string[] Split(char[] separator, StringSplitOptions options)
4) public string[] Split(string[] separator, StringSplitOptions options)
3 t' F( h2 j4 |. |' G; ]5) public string[] Split(char[] separator, int count, StringSplitOptions options)
. O5 k* |! u! r9 Z* J7 ]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";)：

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

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string[] split = words.Split(new Char[] { ',' });//返回:{"1","2.3","","4"}
# [: H6 p' K- Q$ j2 N8 mstring[] split = words.Split(new Char[] { ',', '.' });//返回:{"1","2","3","","4"}

" [6 f5 L5 c3 C7 f+ A% f% X- O2. public string[] Split(char[] separator, int count)

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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3 y  Q1 b' [/ ~; F! N4 L. O/ u7 F  K3. public string[] Split(char[] separator, StringSplitOptions options)
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程序代码
- ]/ d7 N0 f, @% w! K$ `' Y; b3 u7 tstring[] 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

% j- m$ C  r1 ?: l% q) L  h2 G4 k% E4. public string[] Split(string[] separator, StringSplitOptions options)
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程序代码
& z, z; h2 e$ ]* cstring[] split = words.Split(new string[] { ",", "." }, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2","3","4"} 不保留空元素
0 m8 k; f4 ?8 {4 g6 ~2 n( Vstring[] 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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& N1 q( V9 k* }4 a6 {8 i! K- T 程序代码
) S1 U7 e4 k2 I7 w% j+ }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

6. public string[] Split(string[] separator, int count, StringSplitOptions options)

代码
string[] split = words.Split(new string[] { ",", "." }, 2, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2.3,,4"} 不保留空元素
0 [* T3 H& y/ i3 J; B7 x, J  tstring[] split = words.Split(new string[] { ",", "." }, 6, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素

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