Three functions for removing HTML tags from asp

Copy codeThe Code is as follows: '====================================
'Function Description: Remove HTML tags with regular expressions
'You cannot retain <B> <strong> and other custom <and>
'====================================

Function RemoveHTMLTag (fString)
Dim re
Set re = New RegExp
Re. IgnoreCase = True
Re. Pattern = "<(. [^>] *)>"
FString = re. Replace (fString ,"")
Set re = Nothing
RemoveHTMLTag = fString
End Function

'====================================
'Function Description: Remove HTML tags
'You cannot retain <B> <strong> and other custom <and>
'====================================

Function Remove_HTML (Str)
Dim ilen1, ilen2
Do While InStr (1, Str, "<", 1)> 0
Ilen1 = InStr (1, Str, "<", 1)
Ilen2 = InStr (1, Str, ">", 1)
Str = Left (Str, ilen1-1) & Mid (Str, ilen2 + 1)
Loop
Remove_HTML = Str
End Function

'====================================
'Function Description: Remove HTML tags
'Removing custom tags may be slow.
'====================================

Function RemoveHTML (strText)
Dim TAGLIST
TAGLIST = ";! --;! DOCTYPE; A; ACRONYM; ADDRESS; APPLET; AREA; B; BASE; BASEFONT ;"&_
"BGSOUND; BIG; BLOCKQUOTE; BODY; BR; BUTTON; CAPTION; CENTER; CITE; CODE ;"&_
"COL; COLGROUP; COMMENT; DD; DEL; DFN; DIR; DIV; DL; DT; EM; EMBED; FIELDSET ;"&_
"FONT; FORM; FRAME; FRAMESET; HEAD; H1; H2; H3; H4; H5; H6; HR; HTML; I; IFRAME; IMG ;"&_
"INPUT; INS; ISINDEX; KBD; LABEL; LAYER; LAGEND; LI; LINK; LISTING; MAP; MARQUEE ;"&_
"MENU; META; NOBR; NOFRAMES; NOSCRIPT; OBJECT; OL; OPTION; P; PARAM; PLAINTEXT ;"&_
"PRE; Q; S; SAMP; SCRIPT; Select; SMALL; SPAN; STRIKE; STRONG; STYLE; SUB; SUP ;"&_
"TABLE; TBODY; TD; TEXTAREA; TFOOT; TH; THEAD; TITLE; TR; TT; U; UL; VAR; WBR; XMP ;"

Const BLOCKTAGLIST = "; APPLET; EMBED; FRAMESET; HEAD; NOFRAMES; NOSCRIPT; OBJECT; SCRIPT; STYLE ;"

Dim nPos1
Dim nPos2
Dim nPos3
Dim strResult
Dim strTagName
Dim bRemove
Dim bSearchForBlock

NPos1 = InStr (strText, "<")
Do While nPos1> 0
NPos2 = InStr (nPos1 + 1, strText, "> ")
If nPos2> 0 Then
StrTagName = Mid (strText, nPos1 + 1, nPos2-nPos1-1)
StrTagName = Replace (strTagName, vbCr, ""), vbLf ,"")

NPos3 = InStr (strTagName ,"")
If nPos3> 0 Then
StrTagName = Left (strTagName, nPos3-1)
End If

If Left (strTagName, 1) = "/" Then
StrTagName = Mid (strTagName, 2)
BSearchForBlock = False
Else
BSearchForBlock = True
End If

If InStr (1, TAGLIST, ";" & strTagName & ";", vbTextCompare)> 0 Then
BRemove = True
If bSearchForBlock Then
If InStr (1, BLOCKTAGLIST, ";" & strTagName & ";", vbTextCompare)> 0 Then
NPos2 = Len (strText)
NPos3 = InStr (nPos1 + 1, strText, "</" & strTagName, vbTextCompare)
If nPos3> 0 Then
NPos3 = InStr (nPos3 + 1, strText, "> ")
End If

If nPos3> 0 Then
NPos2 = nPos3
End If
End If
End If
Else
BRemove = False
End If

If bRemove Then
StrResult = strResult & Left (strText, nPos1-1)
StrText = Mid (strText, nPos2 + 1)
Else
StrResult = strResult & Left (strText, nPos1)
StrText = Mid (strText, nPos1 + 1)
End If
Else
StrResult = strResult & strText
StrText = ""
End If

NPos1 = InStr (strText, "<")
Loop
StrResult = strResult & strText
StrResult = Replace (strResult, Chr (9 ),"")
StrResult = Replace (strResult, Chr (32 ),"")
StrResult = Replace (strResult, Chr (13 ),"")
StrResult = Replace (strResult, Chr (10 ),"")
StrResult = Replace (strResult, vbCrLf ,"")
RemoveHTML = strResult
End Function