System. Text. regularexpressions. RegEx regex1 = New System. Text. regularexpressions. RegEx ( @" <SCRIPT [\ s] + </script *> " , System. Text. regularexpressions. regexoptions. ignorecase );
System. Text. regularexpressions. RegEx regex2 = New System. Text. regularexpressions. RegEx ( @" Href * = * [\ s] * script *: " , System. Text. regularexpressions. regexoptions. ignorecase );
System. Text. regularexpressions. RegEx regex3 = New System. Text. regularexpressions. RegEx ( @" On [\ s] * = " , System. Text. regularexpressions. regexoptions. ignorecase );
System. Text. regularexpressions. RegEx regex4 = New System. Text. regularexpressions. RegEx ( @" <IFRAME [\ s] + </iframe *> " , System. Text. regularexpressions. regexoptions. ignorecase );
System. Text. regularexpressions. RegEx regex5 = New System. Text. regularexpressions. RegEx ( @" <Frameset [\ s] + </frameset *> " , System. Text. regularexpressions. regexoptions. ignorecase );
String Html = Textbox2.text;
Html = Regex1.replace (textbox2.text, "" ); // Filter <SCRIPT> </SCRIPT> tags
Html = Regex2.replace (HTML, "" ); // Filter href = javascript: (<A>) attributes
Html = Regex3.replace (HTML, " _ Disibledevent = " ); // Filter on events of other controls
Html = Regex4.replace (HTML, "" ); // Filter IFRAME
Html = Regex5.replace (HTML, "" ); // Filter frameset
