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

: I1 \2 w" v5 D1 Y( C/ @  }. p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
3 i) w9 K' [6 N( j9 f/ shttp://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
  g7 Q; ~2 x( `5 N, _: o1) public string[] Split(params char[] separator)
2) public string[] Split(char[] separator, int count)
3) public string[] Split(char[] separator, StringSplitOptions options)
4) public string[] Split(string[] separator, StringSplitOptions options)
: m- x  [% m. j- ~5) public string[] Split(char[] separator, int count, StringSplitOptions options)
& I, D7 r$ l. R6) 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";)：

9 v# r" N& M  P/ Q; z6 E0 O* a* ?1. public string[] Split(params char[] separator)
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: q) b) s5 V& F2 ^ 程序代码
string[] split = words.Split(new Char[] { ',' });//返回:{"1","2.3","","4"}
; h' z+ W# \$ J( ^+ H/ Ostring[] split = words.Split(new Char[] { ',', '.' });//返回:{"1","2","3","","4"}
( p0 ?- B) O1 @2 K, o3 p0 i& {
5 H, m/ z9 b4 R( c+ q+ H& f" d2. public string[] Split(char[] separator, int count)

& X( N7 T! q0 P4 q6 x8 m 程序代码
string[] split = words.Split(new Char[] { ',', '.' }, 2);//返回:{"1","2.3,,4"}
$ W* s1 E# X' B  R' D, m! ustring[] split = words.Split(new Char[] { ',', '.' }, 6);//返回:{"1","2","3","","4"}

" r) _* C5 l; T6 o! a3 j" v, I3. public string[] Split(char[] separator, StringSplitOptions options)
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程序代码
string[] split = words.Split(new Char[] { ',', '.' }, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2","3","4"} 不保留空元素
- ~/ i. V! t' y/ |& sstring[] split = words.Split(new Char[] { ',', '.' }, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素
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9 m/ k* v) e- i' H2 `2 x4. public string[] Split(string[] separator, StringSplitOptions options)
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7 x5 C' u. F3 t3 q 程序代码
! {" t" `* n0 w9 R  V/ ustring[] 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
# ?" q+ v9 b$ F4 u% |* P/ D
5. public string[] Split(char[] separator, int count, StringSplitOptions options)

1 Q4 T/ `) G# C1 q- q* L 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
1 \$ \- X) r! m3 ?% Gstring[] split = words.Split(new Char[] { ',', '.' }, 6, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素

# U. Z$ P! K  v) [* j2 [  I* t6. 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
string[] split = words.Split(new string[] { ",", "." }, 6, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素