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

5 G1 k; D1 M: n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

! F% E: ]! F% Z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
1 `4 X4 T  A% R, R2 E0 Mhttp://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
4 b6 l: U5 J' ]6 shttp://www.itwis.com/html/net/c/20100506/8234.html
  V6 v3 v5 v0 t( O+ m) F  W
: O6 Z# ~* u! X5 R  u程序代码
1) public string[] Split(params char[] separator)
2) public string[] Split(char[] separator, int count)
' Z* m' j( H1 H  C1 v" s3) public string[] Split(char[] separator, StringSplitOptions options)
" r) _2 Y+ a1 E2 h0 r2 T4) public string[] Split(string[] separator, StringSplitOptions options)
5) public string[] Split(char[] separator, int count, StringSplitOptions options)
# y% H# O- ^: {6) public string[] Split(string[] separator, int count, StringSplitOptions options)

( j9 T' O8 v+ m9 L! Z) |/ a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)

% \0 S. d8 O# L 程序代码
. S) F6 C- d' F8 Fstring[] split = words.Split(new Char[] { ',' });//返回:{"1","2.3","","4"}
  g) ]5 K& {: s: Lstring[] split = words.Split(new Char[] { ',', '.' });//返回:{"1","2","3","","4"}

2. public string[] Split(char[] separator, int count)
! u; V* O) M! B5 Q
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"}

" Q& z$ V# ?) a3. 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
! ?  w. ^! i9 f* w( estring[] split = words.Split(new Char[] { ',', '.' }, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素
8 r& o# B7 E" |0 E% l# k
3 n7 M& {, v2 D; b& j" `4. public string[] Split(string[] separator, StringSplitOptions options)

程序代码
; B- Z% T# H4 f8 D$ zstring[] split = words.Split(new string[] { ",", "." }, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2","3","4"} 不保留空元素
7 q8 B$ @& f: f7 O) q, nstring[] 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)
0 Y" d" s& G* Q1 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
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)
. h3 e0 V+ }7 H* ^! t
代码
string[] split = words.Split(new string[] { ",", "." }, 2, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2.3,,4"} 不保留空元素
1 \2 J# a9 }6 C; f/ ystring[] split = words.Split(new string[] { ",", "." }, 6, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素