Asp.net dirty dictionary Filtering Problems use regular expressions to filter dirty data

Method 1: Use a regular expression
Copy codeThe Code is as follows:
// Path for storing dirty Dictionary data
Private static string FILE_NAME = "zang.txt ";
// Dirty data dictionary table, such as: dirty data 1 | dirty data 2 | dirty data 3
Public static string dirtyStr = "";

Public ValidDirty ()
{
If (HttpRuntime. Cache ["Regex"] = null)
{
DirtyStr = ReadDic ();
// Regular expression used to detect dirty dictionaries
Regex validateReg = new Regex ("^ ((?! "+ DirtyStr + ").(? <! "+ DirtyStr +") * $ ", RegexOptions. Compiled | RegexOptions. ExplicitCapture );
HttpRuntime. Cache. Insert ("Regex", validateReg, null, DateTime. Now. AddMinutes (20), TimeSpan. Zero );
}

}
Private string ReadDic ()
{
FILE_NAME = Environment. CurrentDirectory + "\" + FILE_NAME;

If (! File. Exists (FILE_NAME ))
{
Console. WriteLine ("{0} does not exist.", FILE_NAME );
Return "";
}
StreamReader sr = File. OpenText (FILE_NAME );
String input = "";
While (sr. Peek ()>-1)
{
Input + = sr. ReadLine ();
}

Sr. Close ();
Return input;

}


Public bool ValidByReg (string str)
{
Regex reg = (Regex) HttpRuntime. Cache ["Regex"];
Return reg. IsMatch (str );

}

I feel that the execution efficiency of this method is not very high. I tested the article with 1000 words, and the dirty dictionary has more than 800 keywords.
It takes 1.238 seconds. Do you have any better solutions!

Method 2: Common loop search
Copy codeThe Code is as follows:
Public bool ValidGeneral (string str)
{

If (! File. Exists (FILE_NAME ))
{
Console. WriteLine ("the file path or file path does not have an error message ");
Return false;
}
Else
{
StreamReader objReader = new StreamReader (FILE_NAME, System. Text. Encoding. GetEncoding ("gb2312 "));
String sLine = "";
ArrayList arrText = new ArrayList ();

While (sLine! = Null)
{
SLine = objReader. ReadLine ();
If (sLine! = Null)
ArrText. Add (sLine );

}
ObjReader. Close ();


Foreach (string sOutput in arrText)
{
String [] strArr = sOutput. Split ('| ');

For (int I = 0; I <strArr. Length; I ++)
{
If (str. IndexOf (strArr [I])! =-1)
{
Return false;
}

}

}
Return true;

}

}

The following is the test method. If you have any questions, please point out it!
Copy codeThe Code is as follows:
DateTime t1 = DateTime. Now;
String str = "213 ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
Str + = "Cherish the love of the crystal, cherish the love of the crystal, and cherish the love of the Crystal ";
ValidDirty vd = new ValidDirty ();
Console. WriteLine (vd. ValidByReg (str ));
DateTime t2 = DateTime. Now;
Time Span ts = t2-t1;
Console. WriteLine (ts. TotalMilliseconds );
Console. Read ();

Algorithm	Retrieving text file length/elapsed time (MS)
Regular Algorithm	10 Chinese characters/980	100 Chinese characters/999	1000 Chinese characters/1234
Common Algorithms	10 Chinese characters/234	100 Chinese characters/234	1000 Chinese characters/265

Dirty dictionary download
However, this article may have some problems. It is recommended that you read the following two articles before deciding to use them.