Re: can you use a required field validator for a dropdown list box

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From: Paul (Paul_at_discussions.microsoft.com)
Date: 08/03/04 

Date: Tue, 3 Aug 2004 09:17:03 -0700

Ok, thanks for the information. 

-- 
Paul G
Software engineer.
"Scott M." wrote:
> Page.IsValid is returns a boolean value indicating if all of the validation
> code passed or failed.  This is generally used in an If statement:
> 
> If Page.IsValid then
>     'All server validations were successful
> 
> Else
>     'At least one server validation failed
> 
> End If
> 
> You can also force all the server validation code to run with
> Page.Validate().
> 
> 
> 
> 
> "Paul" <Paul@discussions.microsoft.com> wrote in message
> news:25940D9B-4DF3-4CDC-83A6-AC4D0846DA33@microsoft.com...
> > Hi Justin, thanks for the information.  Just wondering what page is valid
> means, seems like it is needed to protect against those not running java
> script.
> >
> > -- 
> > Paul G
> > Software engineer.
> >
> >
> > "S. Justin Gengo" wrote:
> >
> > > Paul,
> > >
> > > Two things.
> > >
> > > 1) To fix the problem of the selected item being fired a second time
> wrap it
> > > in an if then so it only fires on page load:
> > >
> > > If Not Page.IsPostBack Then
> > >     '---Select intial item here
> > > End If
> > >
> > > 2) Always wrap code that should fire only if the page is valid in this
> if
> > > then:
> > >
> > > If Page.IsValid Then
> > >     '---Page is valid: run code
> > > End If
> > >
> > > If you don't then server side validation isn't checked and anyone who
> isn't
> > > running javascript will be able to run the post back even with invalid
> data.
> > >
> > > -- 
> > > Sincerely,
> > >
> > > S. Justin Gengo, MCP
> > > Web Developer / Programmer
> > >
> > > www.aboutfortunate.com
> > >
> > > "Out of chaos comes order."
> > >                             Nietzsche
> > > "Paul" <Paul@discussions.microsoft.com> wrote in message
> > > news:83E2FD59-BE08-4FE8-B63E-EE1DC7E63A68@microsoft.com...
> > > > Hi Scott, thanks for the information.  Looks like it is almost working
> > > correctly, that is if there is no selection and I hit the submit button
> I
> > > get the validation error message. Next a selection is made and the
> > > validation error message goes away.  I then hit submit which causes the
> page
> > > load to execute again as well as the Me.DropDownList1.SelectedItem.Value
> =
> > > "" and this causes the validation error message to appear again.  So the
> > > validation error message seems to appear after the submit button is hit.
> > > > Thanks
> > > > -- 
> > > > Paul G
> > > > Software engineer.
> > > >
> > > >
> > > > "Scott M." wrote:
> > > >
> > > > > You can use a required field validator on dropdowns, but you should
> have
> > > a
> > > > > first item in the dropdown such as --- Choose From Below --- and
> then
> > > you'll
> > > > > need to add this to your page_load event
> > > > >
> > > > > dropdown.selectedItem.value = ""
> > > > >
> > > > > Then the validator won't recognize the first item as a valid item
> and it
> > > > > will work.
> > > > >
> > > > > By the way, all the validators do their validations by client-side
> > > > > JavaScript that is generated for you (except the CustomValidator).
> They
> > > > > also do their checks again server side in case someone tries to
> > > maliciously
> > > > > bypass the client code.
> > > > >
> > > > >
> > > > > "Paul" <Paul@discussions.microsoft.com> wrote in message
> > > > > news:31EC91FE-ACA9-49BD-ADCE-66D2D2A5D4B1@microsoft.com...
> > > > > > I am trying to setup a field validator and tried using the control
> to
> > > > > validate set to a dropdown list box but did not seem to work. Is
> there
> > > > > anyway to set this up or do you need to use client side validation?
> > > Thanks
> > > > > > -- 
> > > > > > Paul G
> > > > > > Software engineer.
> > > > >
> > > > >
> > > > >
> > >
> > >
> > >
> 
> 
>
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