方法一：使用正则表达式
1//脏字典数据存放文件路径
2 private static string FILE_NAME="zang.txt";
3 //脏数据字典表，如：脏数据一|脏数据二|脏数据三
4 public static string dirtyStr="";
5
6 public ValidDirty()
7 {
8 if (HttpRuntime.Cache["Regex"]==null)
9 {
10 dirtyStr=ReadDic();
11 //用于检测脏字典的正则表达式
12 Regex validateReg= new Regex("^((?!"+dirtyStr+").(?<!"+dirtyStr+"))*$",RegexOptions.Compiled|RegexOptions.ExplicitCapture);
13 HttpRuntime.Cache.Insert("Regex" ,validateReg,null,DateTime.Now.AddMinutes(20) ,TimeSpan.Zero);
14 }
15
16 }
17 private string ReadDic()
18 {
19 FILE_NAME=Environment.CurrentDirectory+"\\"+FILE_NAME;
20
21 if (!File.Exists(FILE_NAME))
22 {
23 Console.WriteLine("{0} does not exist.", FILE_NAME);
24 return "";
25 }
26 StreamReader sr = File.OpenText(FILE_NAME);
27 String input="";
28 while (sr.Peek() > -1)
29 {
30 input += sr.ReadLine() ;
31 }
32
33 sr.Close();
34
