There's no numeric representation for this, as a number cannot represent "null", or "nothing". Character reference overview. HTML5 does not require empty elements to be closed. ! ! ! EXCLAMATION MARK " " " " " Empty elements can be "closed" in the opening tag like this:
is an empty element without a closing tag. If you plan to use any of the special characters on this page, you should use either the HTML entity name or the HTML entity number. ANSI is identical to ISO-8859-1, except that ANSI has 32 extra characters. A Char will always hold some kind of value, and because each value has a unique useage, there is no character substitute for the empty string. This page contains a list of HTML special characters. Thus, it is worth considering the use of some appropriate character or string for “empty cells”. But if you want stricter validation, or if you need to make your document readable by XML parsers, you must close all HTML elements properly. The nnnn or hhhh may be any number of digits and may include leading zeros. ASCII control characters non printable : ASCII code 00 = NULL ( Null character ) ASCII code 01 = SOH ( Start of Header ) ASCII code 02 = STX ( Start of Text ) ASCII code 03 = ETX ( End of Text, hearts card suit ) ASCII code 04 = EOT ( End of Transmission, diamonds card suit ) ASCII code 05 = ENQ ( Enquiry, clubs card suit ) ASCII code 06 = ACK ( Acknowledgement, spade card suit ) It depends on what you mean by invisible character. HTML 4 also supported UTF-8. HTML symbol, character and entity codes, ASCII, CSS and HEX values for Empty Set, plus a panoply of others. First, in the latest .NET string.Replace function null is the equivalent to empty character. The Empty String represents a String that is 0 characters long. A numeric character reference refers to a character by its Universal Character Set/Unicode code point, and uses the format: nnnn; or hhhh;. Here is a list of valid HTML/XHTML escape characters you should use. People Call It By Different Names For Example Blank Space, Hidden Text, Invisible Space Text, Empty Character, Invisible Letter, Or A White Space Character. The x must be lowercase in XML documents. Here normal blanks and newlines are regarded as empty, but for example the digit 0 or the hyphen (-) are nonempty, of course – even if they semantically indicated absence of relevant data, in a particular context. In HTML they are undefined, and in XHTML they are completely invalid. If you just want something that takes up one character space I would use which represents a non-breaking space. 	 CHARACTER TABULATION
LINE FEED (LF) ! Invisible Character: Invisible character, As The Name Suggests, Is A Kind Of Empty Blank Space.It Seems Like Space But Actually, It Is A Unicode. ANSI (Windows-1252) was the original Windows character set. In HTML, special characters are typically those that can't be easily typed into a keyboard or may cause display issues if typed or pasted into a web page. Please feel free to reference the code below (runs in LinqPad for testing). The default character set for HTML5 is UTF-8, which covers almost all of the characters and symbols in the world! Some People Call It Magic/joke Text As It Can Be Used To Joke Around With Friends. Hope that helps, Nate This character set supported 256 different character codes. Having said that, what is missing from .Net is a simple replace all that will replace any character in an array with the desired character. where nnnn is the code point in decimal form, and hhhh is the code point in hexadecimal form. HTML escape character lists often include characters between 128 and 159 – the problem is that these are Microsoft specific, and are reserved for control characters in the standard Internet character sets.
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