Creating Live Character Counter RichTextBox in Windows Presentation Foundation

In this screencast Mohammad Azam will demonstrate how to create a custom RichTextBox which enables a live counter view of number of characters allowed. The RichTextBox also allows to set a notify limit which will change the style of the control when a limit has reached.

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Closed Caption:

hi and welcome to our ongoing I'm your
host mom about them
and new screen cast I'm going to show
you want the controls that I have been
working on
it's called a sharp reach text box
control
shop a rich text lost control in Harris
from
normal reach tax most beloved here this
is of course it appears application
but it will it has some other features
that
the rich text format and hack to the
first thing that I can't I'm anything
hi own holding
no holes number
all article medium
Park you can see that as I'm typing the
counter
is Corey Hari 93 many crackers are now
Nash
and do is in order to find the right
property
also on this sharp reached x-mas which
will allow you
to said that conquer or the template
style
this particular company discounters not
really part
whole the sharp rich text box control
isn't just
TextBlock the reason it is not part
the control is that you can provide
these appearance this particular content
account Cumberland County connector
whatever your account is
to be any element that you want so their
sharp rich text box control have
properties you can
by name to some other controls if you're
interested in a pop-up if you're
interested in
life you know anything when you combine
that those properties on any cool
interview
hypnotized crackers are less and less
of course there are certain keys that
are not disabled
even if your account full-length
backfield
lead cut and copy Okies either not
disable even
your account is meet record
here one other thing is that I have
college for that when drinkers are 100
it's going to
notifying you him he stylish way
is going to say that okay you have 100
meeting
3 returning to read in be so
I'm going with them article views and
then the
with it on
Cody the for now the crackers
in are less than 100 have changed you
red color indicating that
you only 93 crackers tight so
type wisely okay i'm new to implement it
because it's going to take a while to
implement
done show you what properties and values
and or dislike John
picture shoppers for respectful control
one other thing is that if I have fun
playing
from notepad in
Babak compares to the clipboard
and is going to YouTube account okay one
posting
should now account is actually
you not one you
even if pressure and he is not he would
work
when I blankley cannot page
because there are no correctors that I
can pitch because
account there but
white remove contractor you will see the
paste options there now what did you do
he's calling you pave the only to push
corrector
in the clip or text only pays
hatch okay and
maybe that's what
maker selected previously so
where if I remove the director
with Paige not pasted
she because tea with a record
okay and so that's pretty much it
on go to the cord shop rich text box
it you parents from be rich text box
control
it all implement hide fine property
change demand
and there are a couple of other things
dependency property
make some crackers for this can be
limited to 100 200 to 1000 whatever
if the maximum number of collectors that
you can type notification women is that
when it reaches is particularly which is
the notification limit
then it will trigger event or it would
trigger some sort of started change
you have a notification style in
property
notifications time property the phone
notification
property his rented property which well
mithi property okay
we have different things going home
hand def basically the part where you
used for all the static dependency
properties then we have some corporate
property change: defenders call him
might go to
yet different hard if granted and we
have
preview now p executed very important
okay because do you we you are going to
see that
you've ended hand LP you did is for
you can actually see before the user
can't see that
director he typed on three okay this is
where you can stop the corrector
are stop the hip and from propagating
and this is done by
team handle is true and through
then you can did it won't be handled on
the
other way it will be held her hand to
on the bubble defense I think
won the tournament won't be bold to the
other
okay one on the team
which are you sure you but I am non-food
custom this video his
which i think is pretty cool peachtree
enabled
his using the he and using the
background
all the rich
or sharp text box control to show the
number
and show you what I mean he now
addition a sharp text box control just
like the previous one
but now the number on the meet record
you can type number affected in time are
displayed in the background
and you can write polaroid the prequel
you can said okay city to me like
0.1 the right now it's like to point to
you for
pretty good more can feeling thankfully
doesn't interfere with the person is
actually typing
knew that the same factory region 100
is going to change the color G
and make even typing until I
reach d zeroing retirement
I know it's kind of hard for me to do
Holdco but it will be discussed
in the article and you know where
articulate hosted by
article important home hi include
we rivals the article BTU's an awful
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so that's pretty much it and I will be
writing an article and it will be hosted
on: recording
and if you have a tradition any comment
and Iran you can just email me and
Harlem
sharp at gmail dot com
thank you very much