升级程序开发——读Web.config、执行Sql脚本

Star

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

; H( a' G7 X) B/ q0 j. `* {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 \. m/ @' w* i3 u/ v4 Y! k# l
% s% q& k. ^1 ?) C/ n: }8 ?2 K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

Star

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

Star

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
8 J1 ^% i0 f, ~$ w% g9 L' ^
  a( @* b7 p! ^1 P' ~& t+ h& w程序代码
6 `+ R: r8 t1 H$ c$ y) t9 o1) public string[] Split(params char[] separator)
/ x( _: N! f5 W2 G2) public string[] Split(char[] separator, int count)
3) public string[] Split(char[] separator, StringSplitOptions options)
4) public string[] Split(string[] separator, StringSplitOptions options)
5) public string[] Split(char[] separator, int count, StringSplitOptions options)
% d1 ~% ?) p* U1 f. G0 m9 q0 ^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)
. Q6 \; K1 _4 e! n$ C
程序代码
% ]9 a  f2 p6 ?4 t* fstring[] split = words.Split(new Char[] { ',' });//返回:{"1","2.3","","4"}
string[] split = words.Split(new Char[] { ',', '.' });//返回:{"1","2","3","","4"}
- ~5 ?0 P7 b' ]- @. m* O* B
2. public string[] Split(char[] separator, int count)
# `: K2 f% {  E  h$ B) i) K
程序代码
2 b! t6 _) ^7 K0 J  O: ^% cstring[] split = words.Split(new Char[] { ',', '.' }, 2);//返回:{"1","2.3,,4"}
2 }/ z  @' h' Dstring[] split = words.Split(new Char[] { ',', '.' }, 6);//返回:{"1","2","3","","4"}

0 H) y4 n" S6 J6 c* U( n3. public string[] Split(char[] separator, StringSplitOptions options)
8 M  A6 i( [. \! J! w
程序代码
& O2 \7 f5 N9 @string[] split = words.Split(new Char[] { ',', '.' }, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2","3","4"} 不保留空元素
( J- T/ P6 c" Z' I) i, k4 d) istring[] split = words.Split(new Char[] { ',', '.' }, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素
9 r- O  {! d: M6 L9 m7 a
; I9 R# ^  K& h. N4. public string[] Split(string[] separator, StringSplitOptions options)

# z* g" N  q8 I; Q 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

5. public string[] Split(char[] separator, int count, StringSplitOptions options)
! h5 ]  z, D# }- L4 N
( u! G( h3 }6 c- y, K1 D; ?; O4 b 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 `1 a- n" Q. I7 s9 X7 Tstring[] split = words.Split(new Char[] { ',', '.' }, 6, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素

7 n) P, ~" v1 N9 _6. public string[] Split(string[] separator, int count, StringSplitOptions options)

' R8 n& z& p8 g4 O- Z: {" l! L代码
string[] split = words.Split(new string[] { ",", "." }, 2, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2.3,,4"} 不保留空元素
0 F& C, ?3 I7 ?; h( o& vstring[] split = words.Split(new string[] { ",", "." }, 6, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素