drop down list change event

[rodchar]

Hey all,

I was wondering againg...on my ASP.NET app I have a drop down list. I've set
the control to AutoPostBack=Tr ue. When I run this app, I select something out
of the drop down list and the screen flickers I guess it indicates that the
PostBack has occurred. Is this the accepted behavior?

thanks,
rodchar

[Philip Rieck]

Re: drop down list change event

Well, if you want it to cause a postback (and fire the SelectedIndexCh anged
event) every time a new item is selected, then yes, this is the correct
behavior.

If you do not want a postback on every single selection, set
AutoPostBack=Fa lse. I personally recommend that you try to make your
application behave this way - postbacks on selection, change, etc. should be
considered a "last resort" on a wep page. Not that they don't have correct
uses, but overuse can kill your usability and performance.

"rodchar" <rodchar@discus sions.microsoft .com> wrote in message
news:3B4AA302-81E4-462E-AFEB-7716B390F2D5@mi crosoft.com...[color=blue]
> Hey all,
>
> I was wondering againg...on my ASP.NET app I have a drop down list. I've
> set
> the control to AutoPostBack=Tr ue. When I run this app, I select something
> out
> of the drop down list and the screen flickers I guess it indicates that
> the
> PostBack has occurred. Is this the accepted behavior?
>
> thanks,
> rodchar[/color]

[rodchar]

Re: drop down list change event

thanks.

"Philip Rieck" wrote:
[color=blue]
> Well, if you want it to cause a postback (and fire the SelectedIndexCh anged
> event) every time a new item is selected, then yes, this is the correct
> behavior.
>
> If you do not want a postback on every single selection, set
> AutoPostBack=Fa lse. I personally recommend that you try to make your
> application behave this way - postbacks on selection, change, etc. should be
> considered a "last resort" on a wep page. Not that they don't have correct
> uses, but overuse can kill your usability and performance.
>
> "rodchar" <rodchar@discus sions.microsoft .com> wrote in message
> news:3B4AA302-81E4-462E-AFEB-7716B390F2D5@mi crosoft.com...[color=green]
> > Hey all,
> >
> > I was wondering againg...on my ASP.NET app I have a drop down list. I've
> > set
> > the control to AutoPostBack=Tr ue. When I run this app, I select something
> > out
> > of the drop down list and the screen flickers I guess it indicates that
> > the
> > PostBack has occurred. Is this the accepted behavior?
> >
> > thanks,
> > rodchar[/color]
>
>
>[/color]

[rodchar]

Re: drop down list change event

thank you.


"Philip Rieck" wrote:
[color=blue]
> Well, if you want it to cause a postback (and fire the SelectedIndexCh anged
> event) every time a new item is selected, then yes, this is the correct
> behavior.
>
> If you do not want a postback on every single selection, set
> AutoPostBack=Fa lse. I personally recommend that you try to make your
> application behave this way - postbacks on selection, change, etc. should be
> considered a "last resort" on a wep page. Not that they don't have correct
> uses, but overuse can kill your usability and performance.
>
> "rodchar" <rodchar@discus sions.microsoft .com> wrote in message
> news:3B4AA302-81E4-462E-AFEB-7716B390F2D5@mi crosoft.com...[color=green]
> > Hey all,
> >
> > I was wondering againg...on my ASP.NET app I have a drop down list. I've
> > set
> > the control to AutoPostBack=Tr ue. When I run this app, I select something
> > out
> > of the drop down list and the screen flickers I guess it indicates that
> > the
> > PostBack has occurred. Is this the accepted behavior?
> >
> > thanks,
> > rodchar[/color]
>
>
>[/color]

[Cor Ligthert]

Re: drop down list change event

Rodchar,

Real live or in your test situation, in the last situation the answer is no,
there was another question about this that I answered today and I forget
that I had planned to do this to you to when I tested that, I did not see
it.

The screen was as flat as flat could be with this code (I filled the
collection with 6 items and no values)
\\\
Private Sub Page_Load(ByVal sender As System.Object, _
ByVal e As System.EventArg s) Handles MyBase.Load
If Not IsPostBack Then
Me.DropDownList 1.AutoPostBack = True
End If
End Sub
Private Sub DropDownList1_S electedIndexCha nged _
(ByVal sender As System.Object, ByVal e As System.EventArg s) _
Handles DropDownList1.S electedIndexCha nged
TextBox1.Text = DropDownList1.S electedItem.ToS tring
End Sub
///
Maybe this helps still something

Cor