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

8 Y( x2 B1 Z: k( Y4 H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

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
5 S5 w" ~( D1 \. o9 F) L5 u, Xhttp://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
9 L8 P+ o+ ^- v: Hhttp://www.itwis.com/html/net/c/20100506/8234.html

程序代码
1) public string[] Split(params char[] separator)
0 ~/ d9 s% ~8 y( d  H7 i; U1 h2) public string[] Split(char[] separator, int count)
3) public string[] Split(char[] separator, StringSplitOptions options)
* Q0 z2 y3 U8 w2 U7 {4) public string[] Split(string[] separator, StringSplitOptions options)
1 r) Q3 T+ x( N0 j; o8 h6 }5) public string[] Split(char[] separator, int count, StringSplitOptions options)
6) public string[] Split(string[] separator, int count, StringSplitOptions options)

: O' Y- A+ W) }) D( P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";)：

% r: _* ?# c  h0 p3 @/ C, @- T. w& k1. public string[] Split(params char[] separator)
( C# m% }( T( W- z  {" W1 i( j
' Q# ~6 L4 s- ^9 @( V% ?$ p+ `* t 程序代码
  T/ z7 x+ J. z' g  t+ kstring[] split = words.Split(new Char[] { ',' });//返回:{"1","2.3","","4"}
& X$ k* L9 J8 l2 K  M+ lstring[] split = words.Split(new Char[] { ',', '.' });//返回:{"1","2","3","","4"}

2. public string[] Split(char[] separator, int count)
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程序代码
string[] split = words.Split(new Char[] { ',', '.' }, 2);//返回:{"1","2.3,,4"}
7 j5 V4 v$ @* e6 ^0 B# d5 P, Ostring[] split = words.Split(new Char[] { ',', '.' }, 6);//返回:{"1","2","3","","4"}
8 o( v3 A* |* V5 ]
9 {9 f/ A$ Q( W$ u) N; z2 o3 `3. public string[] Split(char[] separator, StringSplitOptions options)

' A; H6 e' y0 ], ?/ ?- K( X 程序代码
string[] split = words.Split(new Char[] { ',', '.' }, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2","3","4"} 不保留空元素
" |: n/ q5 }) nstring[] split = words.Split(new Char[] { ',', '.' }, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素

4 O7 s2 b* u4 ]  }: E* C( S, n9 |4. public string[] Split(string[] separator, StringSplitOptions options)
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8 T! {' F: O$ ~, m 程序代码
( h; Q' s! T% jstring[] split = words.Split(new string[] { ",", "." }, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2","3","4"} 不保留空元素
! l/ _+ K* c# e9 Wstring[] split = words.Split(new string[] { ",", "." }, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素
: ]6 r" ^! Z1 `  y
5. public string[] Split(char[] separator, int count, StringSplitOptions options)

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)

) p4 U( j3 u0 M, ?$ {$ s3 b+ U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