HTML Attributes

RichTextBox for WPF and Silverlight supports several HTML 4 attribute. The following table lists HTML attributes by name and element and notes whether they are supported by RichTextBox for WPF and Silverlight.

Name	Elements	Supported
abbr	TD, TH	No
accept-charset	FORM	No
accept	FORM, INPUT	No
accesskey	A, AREA, BUTTON, INPUT, LABEL, LEGEND, TEXTAREA	No
action	FORM	No
align	CAPTION	No
align	APPLET, IFRAME, IMG, INPUT, OBJECT	No
align	LEGEND	No
align	TABLE	No
align	HR	No
align	DIV, H1, H2, H3, H4, H5, H6, P	Yes
align	COL, COLGROUP, TBODY, TD, TFOOT, TH, THEAD, TR	No
alink	BODY	No
alt	APPLET	No
alt	AREA, IMG	No
alt	INPUT	No
archive	APPLET	No
archive	OBJECT	No
axis	TD, TH	No
background	BODY	No
bgcolor	TABLE	Yes
bgcolor	TR	Yes
bgcolor	TD, TH	Yes
bgcolor	BODY	Yes
border	TABLE	Yes
border	IMG, OBJECT	Yes
cellpadding	TABLE	No
cellspacing	TABLE	Yes
char	COL, COLGROUP, TBODY, TD, TFOOT, TH, THEAD, TR	No
charoff	COL, COLGROUP, TBODY, TD, TFOOT, TH, THEAD, TR	No
charset	A, LINK, SCRIPT	No
checked	INPUT	No
cite	BLOCKQUOTE, Q	No
cite	DEL, INS	No
class	All elements but BASE, BASEFONT, HEAD, HTML, META, PARAM, SCRIPT, STYLE, TITLE	Yes
classid	OBJECT	No
clear	BR	No
code	APPLET	No
codebase	OBJECT	No
codebase	APPLET	No
codetype	OBJECT	No
color	BASEFONT, FONT	No
cols	FRAMESET	No
cols	TEXTAREA	No
colspan	TD, TH	Yes
compact	DIR, DL, MENU, OL, UL	No
content	META	No
coords	AREA	No
coords	A	No
data	OBJECT	No
datetime	DEL, INS	No
declare	OBJECT	No
defer	SCRIPT	No
dir	All elements but APPLET, BASE, BASEFONT, BDO, BR, FRAME, FRAMESET, IFRAME, PARAM, SCRIPT	No
dir	BDO	No
disabled	BUTTON, INPUT, OPTGROUP, OPTION, SELECT, TEXTAREA	No
enctype	FORM	No
face	BASEFONT, FONT	Yes
for	LABEL	No
frame	TABLE	Yes
frameborder	FRAME, IFRAME	No
headers	TD, TH	No
height	IFRAME	No
height	TD, TH	No
height	IMG, OBJECT	Yes
height	APPLET	No
href	A, AREA, LINK	Yes
href	BASE	No
hreflang	A, LINK	No
hspace	APPLET, IMG, OBJECT	Yes
http-equiv	META	No
id	All elements but BASE, HEAD, HTML, META, SCRIPT, STYLE, TITLE	Yes
ismap	IMG, INPUT	No
label	OPTION	No
label	OPTGROUP	No
lang	All elements but APPLET, BASE, BASEFONT, BR, FRAME, FRAMESET, IFRAME, PARAM, SCRIPT	No
language	SCRIPT	No
link	BODY	No
longdesc	IMG	No
longdesc	FRAME, IFRAME	No
marginheight	FRAME, IFRAME	No
marginwidth	FRAME, IFRAME	No
maxlength	INPUT	No
media	STYLE	No
media	LINK	No
method	FORM	No
multiple	SELECT	No
name	BUTTON, TEXTAREA	No
name	APPLET	No
name	SELECT	No
name	FORM	No
name	FRAME, IFRAME	No
name	IMG	No
name	A	No
name	INPUT, OBJECT	No
name	MAP	No
name	PARAM	No
name	META	No
nohref	AREA	No
noresize	FRAME	No
noshade	HR	No
nowrap	TD, TH	No
object	APPLET	No
onblur	A, AREA, BUTTON, INPUT, LABEL, SELECT, TEXTAREA	No
onchange	INPUT, SELECT, TEXTAREA	No
onclick	All elements but APPLET, BASE, BASEFONT, BDO, BR, FONT, FRAME, FRAMESET, HEAD, HTML, IFRAME, ISINDEX, META, PARAM, SCRIPT, STYLE, TITLE	No
ondblclick	All elements but APPLET, BASE, BASEFONT, BDO, BR, FONT, FRAME, FRAMESET, HEAD, HTML, IFRAME, ISINDEX, META, PARAM, SCRIPT, STYLE, TITLE	No
onfocus	A, AREA, BUTTON, INPUT, LABEL, SELECT, TEXTAREA	No
onkeydown	All elements but APPLET, BASE, BASEFONT, BDO, BR, FONT, FRAME, FRAMESET, HEAD, HTML, IFRAME, ISINDEX, META, PARAM, SCRIPT, STYLE, TITLE	No
onkeypress	All elements but APPLET, BASE, BASEFONT, BDO, BR, FONT, FRAME, FRAMESET, HEAD, HTML, IFRAME, ISINDEX, META, PARAM, SCRIPT, STYLE, TITLE	No
onkeyup	All elements but APPLET, BASE, BASEFONT, BDO, BR, FONT, FRAME, FRAMESET, HEAD, HTML, IFRAME, ISINDEX, META, PARAM, SCRIPT, STYLE, TITLE	No
onload	FRAMESET	No
onload	BODY	No
onmousedown	All elements but APPLET, BASE, BASEFONT, BDO, BR, FONT, FRAME, FRAMESET, HEAD, HTML, IFRAME, ISINDEX, META, PARAM, SCRIPT, STYLE, TITLE	No
onmousemove	All elements but APPLET, BASE, BASEFONT, BDO, BR, FONT, FRAME, FRAMESET, HEAD, HTML, IFRAME, ISINDEX, META, PARAM, SCRIPT, STYLE, TITLE	No
onmouseout	All elements but APPLET, BASE, BASEFONT, BDO, BR, FONT, FRAME, FRAMESET, HEAD, HTML, IFRAME, ISINDEX, META, PARAM, SCRIPT, STYLE, TITLE	No
onmouseover	All elements but APPLET, BASE, BASEFONT, BDO, BR, FONT, FRAME, FRAMESET, HEAD, HTML, IFRAME, ISINDEX, META, PARAM, SCRIPT, STYLE, TITLE	No
onmouseup	All elements but APPLET, BASE, BASEFONT, BDO, BR, FONT, FRAME, FRAMESET, HEAD, HTML, IFRAME, ISINDEX, META, PARAM, SCRIPT, STYLE, TITLE	No
onreset	FORM	No
onselect	INPUT, TEXTAREA	No
onsubmit	FORM	No
onunload	FRAMESET	No
onunload	BODY	No
profile	HEAD	No
prompt	ISINDEX	No
readonly	TEXTAREA	No
readonly	INPUT	No
rel	A, LINK	No
rev	A, LINK	No
rows	FRAMESET	No
rows	TEXTAREA	No
rowspan	TD, TH	Yes
rules	TABLE	Yes
scheme	META	No
scope	TD, TH	No
scrolling	FRAME, IFRAME	No
selected	OPTION	No
shape	AREA	No
shape	A	No
size	HR	No
size	FONT	No
size	INPUT	No
size	BASEFONT	No
size	SELECT	No
span	COL	No
span	COLGROUP	No
src	SCRIPT	No
src	INPUT	No
src	FRAME, IFRAME	No
src	IMG	No
standby	OBJECT	No
start	OL	Yes
style	All elements but BASE, BASEFONT, HEAD, HTML, META, PARAM, SCRIPT, STYLE, TITLE	Yes
summary	TABLE	No
tabindex	A, AREA, BUTTON, INPUT, OBJECT, SELECT, TEXTAREA	No
target	A, AREA, BASE, FORM, LINK	No
text	BODY	No
title	All elements but BASE, BASEFONT, HEAD, HTML, META, PARAM, SCRIPT, TITLE	Yes
type	A, LINK	No
type	OBJECT	No
type	PARAM	No
type	SCRIPT	No
type	STYLE	No
type	INPUT	No
type	LI	No
type	OL	No
type	UL	No
type	BUTTON	No
usemap	IMG, INPUT, OBJECT	No
valign	COL, COLGROUP, TBODY, TD, TFOOT, TH, THEAD, TR	Yes
value	INPUT	No
value	OPTION	No
value	PARAM	No
value	BUTTON	No
value	LI	No
valuetype	PARAM	No
version	HTML	No
vlink	BODY	No
vspace	APPLET, IMG, OBJECT	Yes
width	HR	No
width	IFRAME	No
width	IMG, OBJECT	Yes
width	TABLE	No
width	TD, TH	No
width	APPLET	No
width	COL	Yes
width	COLGROUP	No
width	PRE	No