Filter and replace

String str2 = filterhtml (this. textbox1.text. tostring ());
This. textbox2.text = Str. Replace ("1 \ r \ n floor", "love ");
RegEx = new RegEx ("1 [1 \ s | \ s] * ");
String A = RegEx. Replace (this. textbox1.text. tostring (), "1st Floor ");

B = This. textbox1.text. tostring ();
RegEx = new RegEx ("{n} [\ s | \ s] * ");
B = RegEx. Replace (B, "31 ");

 

 

Public static string filterhtml (string input)
{
If (input = NULL | input = "")
Return input;
Input = input. Replace ("&", "& amp ;");
Input = input. Replace ("<", "& lt ;");
Input = input. Replace (">", "& gt ;");
Input = input. Replace ("", "& nbsp ;");
// Input = input. Replace ("'", "& #39 ;");
Input = input. Replace ("\", "& quot ;");
Input = input. Replace ("\ r \ n", "<br> \ r \ n ");
Return input;
}

 

 

Public String checkstr (string HTML)
{
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 (@ "No [\ 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 );
System. text. regularexpressions. regEx regex6 = new system. text. regularexpressions. regEx (@ "\ ] + \>", system. text. regularexpressions. regexoptions. ignorecase );
System. Text. regularexpressions. RegEx regex7 = new system. Text. regularexpressions. RegEx (@ "</P>", system. Text. regularexpressions. regexoptions. ignorecase );
System. Text. regularexpressions. RegEx regex8 = new system. Text. regularexpressions. RegEx (@ "<p>", system. Text. regularexpressions. regexoptions. ignorecase );
System. Text. regularexpressions. RegEx regex9 = new system. Text. regularexpressions. RegEx (@ "<[^>] *>", system. Text. regularexpressions. regexoptions. ignorecase );
Html = regex1.replace (HTML, ""); // filter <SCRIPT> </SCRIPT> tags
Html = regex2.replace (HTML, ""); // filter href = javascript: (<A>) attributes
Html = regex3.replace (HTML, "_ disibledevent ="); // filter events of other controls.
Html = regex4.replace (HTML, ""); // filter IFRAME
Html = regex5.replace (HTML, ""); // filter frameset
Html = regex6.replace (HTML, ""); // filter frameset
Html = regex7.replace (HTML, ""); // filter frameset
Html = regex8.replace (HTML, ""); // filter frameset
Html = regex9.replace (HTML ,"");
Html = html. Replace ("","");
Html = html. Replace ("</strong> ","");
Html = html. Replace ("<strong> ","");
Return HTML;
}

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