I'm building a custom textbox for numbers only (actually two of them - one
for integers and one that allows currency entries, but let's discuss the
integer only control). I'm having a problem knowing where in the current
string the user is trying to enter '-' (ascii 45). I have been able to
ensure it can't be entered twice, but I currenty only allow it at all when
the string length is zero. However, if the user enters '345' and now wants
to change it to '-345' I don't allow it, because I don't know how to
determine if the entry is 34-5 or 3-45 or 345- or -345. In what event and
in what manner can I solve this?
Thanks for any help.
Bernie Yaeger
4  1168 
You should be able to use textbox1.select ionstart to figure out where the
cursor is when the user hits a key...
Josh Moody
VSU Team
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-------------------- From: "Bernie Yaeger" <be*****@cherwe llinc.com>
Subject: trapping the location of a keypress inside the existing string in
a custom textboxDate: Fri, 9 Jan 2004 16:04:43 -0500
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I'm building a custom textbox for numbers only (actually two of them - one
for integers and one that allows currency entries, but let's discuss the
integer only control). I'm having a problem knowing where in the current
string the user is trying to enter '-' (ascii 45). I have been able to
ensure it can't be entered twice, but I currenty only allow it at all when
the string length is zero. However, if the user enters '345' and now wants
to change it to '-345' I don't allow it, because I don't know how to
determine if the entry is 34-5 or 3-45 or 345- or -345. In what event and
in what manner can I solve this?
Thanks for any help.
Bernie Yaeger
Bernie:
What about a Regex on key down, or simply trapping what's being pressed.
Combine the Ascii representation and append it to the current text. If that
new value will make it not be a number any more, than just eat the keypress.
With a regex (a really simple one would be \d*) you could do some pretty
complex validation.
HTH
Bill
"Bernie Yaeger" <be*****@cherwe llinc.com> wrote in message
news:u2******** ******@tk2msftn gp13.phx.gbl... I'm building a custom textbox for numbers only (actually two of them - one
for integers and one that allows currency entries, but let's discuss the
integer only control). I'm having a problem knowing where in the current
string the user is trying to enter '-' (ascii 45). I have been able to
ensure it can't be entered twice, but I currenty only allow it at all when
the string length is zero. However, if the user enters '345' and now
wants to change it to '-345' I don't allow it, because I don't know how to
determine if the entry is 34-5 or 3-45 or 345- or -345. In what event and
in what manner can I solve this?
Thanks for any help.
Bernie Yaeger
Hi BIll,
Both your idea and Josh's worked fine - tx!
Bernie
"William Ryan" <do********@nos pam.comcast.net > wrote in message
news:er******** ******@TK2MSFTN GP12.phx.gbl... Bernie:
What about a Regex on key down, or simply trapping what's being pressed.
Combine the Ascii representation and append it to the current text. If
that new value will make it not be a number any more, than just eat the
keypress. With a regex (a really simple one would be \d*) you could do some pretty
complex validation.
HTH
Bill
"Bernie Yaeger" <be*****@cherwe llinc.com> wrote in message
news:u2******** ******@tk2msftn gp13.phx.gbl... I'm building a custom textbox for numbers only (actually two of them -
one for integers and one that allows currency entries, but let's discuss the
integer only control). I'm having a problem knowing where in the
current string the user is trying to enter '-' (ascii 45). I have been able to
ensure it can't be entered twice, but I currenty only allow it at all
when the string length is zero. However, if the user enters '345' and now
wants to change it to '-345' I don't allow it, because I don't know how to
determine if the entry is 34-5 or 3-45 or 345- or -345. In what event
and in what manner can I solve this?
Thanks for any help.
Bernie Yaeger
Hi Josh,
Both your idea and Bill Ryan's worked fine - tx!
Bernie
"Josh Moody [MSFT]" <Jo********@onl ine.microsoft.c om> wrote in message
news:bI******** ******@cpmsftng xa07.phx.gbl... You should be able to use textbox1.select ionstart to figure out where the
cursor is when the user hits a key...
Josh Moody
VSU Team
--
This posting is provided "AS IS" with no warranties, and confers no
rights. Use of included script samples are subject to the terms specified at
http://www.microsoft.com/info/cpyright.htm
Note: For the benefit of the community-at-large, all responses to this
message are best directed to the newsgroup/thread from which they
originated.
--------------------From: "Bernie Yaeger" <be*****@cherwe llinc.com>
Subject: trapping the location of a keypress inside the existing string
in a custom textboxDate: Fri, 9 Jan 2004 16:04:43 -0500
Lines: 15
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X-Tomcat-NG: microsoft.publi c.dotnet.langua ges.vb
I'm building a custom textbox for numbers only (actually two of them -
onefor integers and one that allows currency entries, but let's discuss the
integer only control). I'm having a problem knowing where in the current
string the user is trying to enter '-' (ascii 45). I have been able to
ensure it can't be entered twice, but I currenty only allow it at all
whenthe string length is zero. However, if the user enters '345' and now
wantsto change it to '-345' I don't allow it, because I don't know how to
determine if the entry is 34-5 or 3-45 or 345- or -345. In what event
andin what manner can I solve this?
Thanks for any help.
Bernie Yaeger
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