Call VB Code Behind Function from JavaScript???

[jason.gyetko]

I'm using JavaScript to capture a keypress in my web form. Right now
all it does is post an alert message box. Is there a way to have it
call a function in my VB code behind? All I really want to do is open
another web form when a certain key is pressed. I guess I'd also like
to be able to give focus to a specific textbox on the page when a key
is pressed.

In case you're wondering why... I am scanning in most of my values and
each barcode is prefixed according to the field it goes in, so when
"a123" is scanned, it will get put into a certain field no matter where
the cursor is on the page, and when "b123" is scanned, that will get
put into a certain field and so on.

Any suggestions would be appreciated. Thanks.

[DavidTurcotte]

U can use a work around with

document.forms(0).submit() in javascript

That will do a PostBack server-side

for branching, you can use a hidden

document.forms(0).hidField.value="ScanIsOk"

and server side

if request.form("hidField")="ScanIsOk" then....

ja**********@epower-inc.com wrote:

I'm using JavaScript to capture a keypress in my web form. Right now
all it does is post an alert message box. Is there a way to have it
call a function in my VB code behind? All I really want to do is open
another web form when a certain key is pressed. I guess I'd also like
to be able to give focus to a specific textbox on the page when a key
is pressed.

In case you're wondering why... I am scanning in most of my values and
each barcode is prefixed according to the field it goes in, so when
"a123" is scanned, it will get put into a certain field no matter where
the cursor is on the page, and when "b123" is scanned, that will get
put into a certain field and so on.

Any suggestions would be appreciated. Thanks.

[John Prado]

The best approach is Ajax to access your codebehind in javascript:

See the atlas project page:

http://atlas.asp.net
ja**********@epower-inc.com wrote:

I'm using JavaScript to capture a keypress in my web form. Right now
all it does is post an alert message box. Is there a way to have it
call a function in my VB code behind? All I really want to do is open
another web form when a certain key is pressed. I guess I'd also like
to be able to give focus to a specific textbox on the page when a key
is pressed.

In case you're wondering why... I am scanning in most of my values and
each barcode is prefixed according to the field it goes in, so when
"a123" is scanned, it will get put into a certain field no matter where
the cursor is on the page, and when "b123" is scanned, that will get
put into a certain field and so on.

Any suggestions would be appreciated. Thanks.

[Peter Bromberg [C# MVP]]

If you want to actually make calls to Codebehind methods in your page via
client-side events, you need to either use Atlas (ASP.NET 2.0) or look into
Remote Scripting ("AJAX") libraries such as Anthem.NET, which is available on
sourceforge.net.
Peter

--
Co-founder, Eggheadcafe.com developer portal:
http://www.eggheadcafe.com
UnBlog:
http://petesbloggerama.blogspot.com


"ja**********@epower-inc.com" wrote:

I'm using JavaScript to capture a keypress in my web form. Right now
all it does is post an alert message box. Is there a way to have it
call a function in my VB code behind? All I really want to do is open
another web form when a certain key is pressed. I guess I'd also like
to be able to give focus to a specific textbox on the page when a key
is pressed.

In case you're wondering why... I am scanning in most of my values and
each barcode is prefixed according to the field it goes in, so when
"a123" is scanned, it will get put into a certain field no matter where
the cursor is on the page, and when "b123" is scanned, that will get
put into a certain field and so on.

Any suggestions would be appreciated. Thanks.

[bruce barker \(sqlwork.com\)]

this should all be easily done with client script, no need to bother the
server.

-- bruce (sqlwork.com)
<ja**********@epower-inc.com> wrote in message
news:11**********************@i40g2000cwc.googlegr oups.com...

I'm using JavaScript to capture a keypress in my web form. Right now
all it does is post an alert message box. Is there a way to have it
call a function in my VB code behind? All I really want to do is open
another web form when a certain key is pressed. I guess I'd also like
to be able to give focus to a specific textbox on the page when a key
is pressed.

In case you're wondering why... I am scanning in most of my values and
each barcode is prefixed according to the field it goes in, so when
"a123" is scanned, it will get put into a certain field no matter where
the cursor is on the page, and when "b123" is scanned, that will get
put into a certain field and so on.

Any suggestions would be appreciated. Thanks.

[jason.gyetko]

Got it. Thanks for the help!!