Loading a listbox from a Dropdownlist

[gv]

Ok,

Hi all, new to asp.net. Simple question

with web forms

I have a Dropdownlist and a listbox, I want to click on and item in the
dropdownlist and show items in listbox. that simple

I have this: I have two items in Dropdownlist. The Reportlist doesn't show
the items ?

I tried to set the Autopostback to true. This does work but, the page
flickers

Private Sub Databaselist_Se lectedIndexChan ged(ByVal sender As
System.Object, ByVal e As System.EventArg s) Handles
Databaselist.Se lectedIndexChan ged
If Databaselist.Se lectedValue = "Test1" Then

ReportList.Item s.Clear()
ReportList.Item s.Add("Test1Tot als by Date Range")
ReportList.Item s.Add("Test1Tot als by name and Date Range")

ElseIf Databaselist.Se lectedValue = "Test2" Then

ReportList.Item s.Clear()
ReportList.Item s.Add("Test2Tot als by Date Range")
ReportList.Item s.Add("Test2 Totals by name and Date Range")

End If
End Sub

[Curt_C [MVP]]

are you clearing them/setting them in the page_load? You may be blanking
them out each time.
look at the IsPostBack() to differentiate

--
Curt Christianson
Site & Scripts: http://www.Darkfalz.com
Blog: http://blog.Darkfalz.com
"gv" <vi*****@musc.e du> wrote in message
news:%2******** **********@TK2M SFTNGP12.phx.gb l...

Ok,

Hi all, new to asp.net. Simple question

with web forms

I have a Dropdownlist and a listbox, I want to click on and item in the
dropdownlist and show items in listbox. that simple

I have this: I have two items in Dropdownlist. The Reportlist doesn't show
the items ?

I tried to set the Autopostback to true. This does work but, the page
flickers

Private Sub Databaselist_Se lectedIndexChan ged(ByVal sender As
System.Object, ByVal e As System.EventArg s) Handles
Databaselist.Se lectedIndexChan ged
If Databaselist.Se lectedValue = "Test1" Then

ReportList.Item s.Clear()
ReportList.Item s.Add("Test1Tot als by Date Range")
ReportList.Item s.Add("Test1Tot als by name and Date Range")

ElseIf Databaselist.Se lectedValue = "Test2" Then

ReportList.Item s.Clear()
ReportList.Item s.Add("Test2Tot als by Date Range")
ReportList.Item s.Add("Test2 Totals by name and Date Range")

End If
End Sub

[Karl Seguin]

Gv:
It works fine for me. Are you sure you have the AutoPostBack=tr ue for the
dropdownlist?

karl

--
MY ASP.Net tutorials
http://www.openmymind.net/
"gv" <vi*****@musc.e du> wrote in message
news:%2******** **********@TK2M SFTNGP12.phx.gb l...

Ok,

Hi all, new to asp.net. Simple question

with web forms

I have a Dropdownlist and a listbox, I want to click on and item in the
dropdownlist and show items in listbox. that simple

I have this: I have two items in Dropdownlist. The Reportlist doesn't show
the items ?

I tried to set the Autopostback to true. This does work but, the page
flickers

Private Sub Databaselist_Se lectedIndexChan ged(ByVal sender As
System.Object, ByVal e As System.EventArg s) Handles
Databaselist.Se lectedIndexChan ged
If Databaselist.Se lectedValue = "Test1" Then

ReportList.Item s.Clear()
ReportList.Item s.Add("Test1Tot als by Date Range")
ReportList.Item s.Add("Test1Tot als by name and Date Range")

ElseIf Databaselist.Se lectedValue = "Test2" Then

ReportList.Item s.Clear()
ReportList.Item s.Add("Test2Tot als by Date Range")
ReportList.Item s.Add("Test2 Totals by name and Date Range")

End If
End Sub

[gv]

Thanks for your help, I'm only clearing the listbox before I load the new
values based on what is selected in the dropdownlist.
The values load fine when the page first opens. Not when the
controls SelectedIndexCh anged event fires.

GV


"Curt_C [MVP]" <software_AT_da rkfalz.com> wrote in message
news:uv******** ******@TK2MSFTN GP11.phx.gbl...

are you clearing them/setting them in the page_load? You may be blanking
them out each time.
look at the IsPostBack() to differentiate

--
Curt Christianson
Site & Scripts: http://www.Darkfalz.com
Blog: http://blog.Darkfalz.com
"gv" <vi*****@musc.e du> wrote in message
news:%2******** **********@TK2M SFTNGP12.phx.gb l...

Ok,

Hi all, new to asp.net. Simple question

with web forms

I have a Dropdownlist and a listbox, I want to click on and item in the
dropdownlist and show items in listbox. that simple

I have this: I have two items in Dropdownlist. The Reportlist doesn't
show the items ?

I tried to set the Autopostback to true. This does work but, the page
flickers

Private Sub Databaselist_Se lectedIndexChan ged(ByVal sender As
System.Object, ByVal e As System.EventArg s) Handles
Databaselist.Se lectedIndexChan ged
If Databaselist.Se lectedValue = "Test1" Then

ReportList.Item s.Clear()
ReportList.Item s.Add("Test1Tot als by Date Range")
ReportList.Item s.Add("Test1Tot als by name and Date Range")

ElseIf Databaselist.Se lectedValue = "Test2" Then

ReportList.Item s.Clear()
ReportList.Item s.Add("Test2Tot als by Date Range")
ReportList.Item s.Add("Test2 Totals by name and Date Range")

End If
End Sub

[gv]

If I do that, it works fine like I said but, flickers?

I don't want it to flicker when I do this.

thanks
gv
"Karl Seguin" <karl REMOVE @ REMOVE openmymind REMOVEMETOO . ANDME net>
wrote in message news:e5******** ******@TK2MSFTN GP09.phx.gbl...

Gv:
It works fine for me. Are you sure you have the AutoPostBack=tr ue for the
dropdownlist?

karl

--
MY ASP.Net tutorials
http://www.openmymind.net/
"gv" <vi*****@musc.e du> wrote in message
news:%2******** **********@TK2M SFTNGP12.phx.gb l...

Ok,

Hi all, new to asp.net. Simple question

with web forms

I have a Dropdownlist and a listbox, I want to click on and item in the
dropdownlist and show items in listbox. that simple

I have this: I have two items in Dropdownlist. The Reportlist doesn't
show
the items ?

I tried to set the Autopostback to true. This does work but, the page
flickers

Private Sub Databaselist_Se lectedIndexChan ged(ByVal sender As
System.Object, ByVal e As System.EventArg s) Handles
Databaselist.Se lectedIndexChan ged
If Databaselist.Se lectedValue = "Test1" Then

ReportList.Item s.Clear()
ReportList.Item s.Add("Test1Tot als by Date Range")
ReportList.Item s.Add("Test1Tot als by name and Date Range")

ElseIf Databaselist.Se lectedValue = "Test2" Then

ReportList.Item s.Clear()
ReportList.Item s.Add("Test2Tot als by Date Range")
ReportList.Item s.Add("Test2 Totals by name and Date Range")

End If
End Sub

[Karl Seguin]

Geez..so much for reading through everything....i didn't catch that at all.

One solution is to do everything on the client-side...which has its up and
down side.

Another one is to turn on SmartNavigation which only works in IE and some
people have a lot of problems with it. Try putting SmartNaviation= true in
the <%@ Page directive...
You should check out:
http://weblogs.asp.net/ksamaschke/ar...4/27/6085.aspx or just do a
google search for SmartNavigation

Other that that, it's the nature of doing web programming...

Karl

--
MY ASP.Net tutorials
http://www.openmymind.net/
"gv" <vi*****@musc.e du> wrote in message
news:Ox******** ******@TK2MSFTN GP09.phx.gbl...

If I do that, it works fine like I said but, flickers?

I don't want it to flicker when I do this.

thanks
gv
"Karl Seguin" <karl REMOVE @ REMOVE openmymind REMOVEMETOO . ANDME net>
wrote in message news:e5******** ******@TK2MSFTN GP09.phx.gbl...

Gv:
It works fine for me. Are you sure you have the AutoPostBack=tr ue for the dropdownlist?

karl

--
MY ASP.Net tutorials
http://www.openmymind.net/
"gv" <vi*****@musc.e du> wrote in message
news:%2******** **********@TK2M SFTNGP12.phx.gb l...

Ok,

Hi all, new to asp.net. Simple question

with web forms

I have a Dropdownlist and a listbox, I want to click on and item in the
dropdownlist and show items in listbox. that simple

I have this: I have two items in Dropdownlist. The Reportlist doesn't
show
the items ?

I tried to set the Autopostback to true. This does work but, the page
flickers

Private Sub Databaselist_Se lectedIndexChan ged(ByVal sender As
System.Object, ByVal e As System.EventArg s) Handles
Databaselist.Se lectedIndexChan ged
If Databaselist.Se lectedValue = "Test1" Then

ReportList.Item s.Clear()
ReportList.Item s.Add("Test1Tot als by Date Range")
ReportList.Item s.Add("Test1Tot als by name and Date Range")

ElseIf Databaselist.Se lectedValue = "Test2" Then

ReportList.Item s.Clear()
ReportList.Item s.Add("Test2Tot als by Date Range")
ReportList.Item s.Add("Test2 Totals by name and Date Range")

End If
End Sub

[Curt_C [MVP]]

you cant avoid the flicker. That is the page making a round trip to the
server, its unavoidable unless you do it all with clientside code

--
Curt Christianson
Site & Scripts: http://www.Darkfalz.com
Blog: http://blog.Darkfalz.com
"gv" <vi*****@musc.e du> wrote in message
news:Ox******** ******@TK2MSFTN GP09.phx.gbl...

If I do that, it works fine like I said but, flickers?

I don't want it to flicker when I do this.

thanks
gv
"Karl Seguin" <karl REMOVE @ REMOVE openmymind REMOVEMETOO . ANDME net>
wrote in message news:e5******** ******@TK2MSFTN GP09.phx.gbl...

Gv:
It works fine for me. Are you sure you have the AutoPostBack=tr ue for
the
dropdownlist?

karl

--
MY ASP.Net tutorials
http://www.openmymind.net/
"gv" <vi*****@musc.e du> wrote in message
news:%2******** **********@TK2M SFTNGP12.phx.gb l...

Ok,

Hi all, new to asp.net. Simple question

with web forms

I have a Dropdownlist and a listbox, I want to click on and item in the
dropdownlist and show items in listbox. that simple

I have this: I have two items in Dropdownlist. The Reportlist doesn't
show
the items ?

I tried to set the Autopostback to true. This does work but, the page
flickers

Private Sub Databaselist_Se lectedIndexChan ged(ByVal sender As
System.Object, ByVal e As System.EventArg s) Handles
Databaselist.Se lectedIndexChan ged
If Databaselist.Se lectedValue = "Test1" Then

ReportList.Item s.Clear()
ReportList.Item s.Add("Test1Tot als by Date Range")
ReportList.Item s.Add("Test1Tot als by name and Date Range")

ElseIf Databaselist.Se lectedValue = "Test2" Then

ReportList.Item s.Clear()
ReportList.Item s.Add("Test2Tot als by Date Range")
ReportList.Item s.Add("Test2 Totals by name and Date Range")

End If
End Sub

[gv]

How would I do this part on the client side?

SmartNavigation didn't help.

thanks
Gerry
"Karl Seguin" <karl REMOVE @ REMOVE openmymind REMOVEMETOO . ANDME net>
wrote in message news:eS******** ******@TK2MSFTN GP11.phx.gbl...

Geez..so much for reading through everything....i didn't catch that at
all.

One solution is to do everything on the client-side...which has its up and
down side.

Another one is to turn on SmartNavigation which only works in IE and some
people have a lot of problems with it. Try putting SmartNaviation= true
in
the <%@ Page directive...
You should check out:
http://weblogs.asp.net/ksamaschke/ar...4/27/6085.aspx or just do
a
google search for SmartNavigation

Other that that, it's the nature of doing web programming...

Karl

--
MY ASP.Net tutorials
http://www.openmymind.net/
"gv" <vi*****@musc.e du> wrote in message
news:Ox******** ******@TK2MSFTN GP09.phx.gbl...

If I do that, it works fine like I said but, flickers?

I don't want it to flicker when I do this.

thanks
gv
"Karl Seguin" <karl REMOVE @ REMOVE openmymind REMOVEMETOO . ANDME net>
wrote in message news:e5******** ******@TK2MSFTN GP09.phx.gbl...

> Gv:
> It works fine for me. Are you sure you have the AutoPostBack=tr ue for the > dropdownlist?
>
> karl
>
> --
> MY ASP.Net tutorials
> http://www.openmymind.net/
>
>
> "gv" <vi*****@musc.e du> wrote in message
> news:%2******** **********@TK2M SFTNGP12.phx.gb l...
>> Ok,
>>
>> Hi all, new to asp.net. Simple question
>>
>> with web forms
>>
>> I have a Dropdownlist and a listbox, I want to click on and item in
>> the
>> dropdownlist and show items in listbox. that simple
>>
>> I have this: I have two items in Dropdownlist. The Reportlist doesn't
>> show
>> the items ?
>>
>> I tried to set the Autopostback to true. This does work but, the page
>> flickers
>>
>> Private Sub Databaselist_Se lectedIndexChan ged(ByVal sender As
>> System.Object, ByVal e As System.EventArg s) Handles
>> Databaselist.Se lectedIndexChan ged
>> If Databaselist.Se lectedValue = "Test1" Then
>>
>> ReportList.Item s.Clear()
>> ReportList.Item s.Add("Test1Tot als by Date Range")
>> ReportList.Item s.Add("Test1Tot als by name and Date Range")
>>
>> ElseIf Databaselist.Se lectedValue = "Test2" Then
>>
>> ReportList.Item s.Clear()
>> ReportList.Item s.Add("Test2Tot als by Date Range")
>> ReportList.Item s.Add("Test2 Totals by name and Date
>> Range")
>>
>> End If
>> End Sub
>>
>>
>
>

[Karl Seguin]

GV:
There's no magic bullet to achieve this...it involves knowing a lot about
javascript, cross browser issues and using whatever ASP.Net offers to make
it easier (which really isn't too much, sadly).

One slightly clean solution is outlined here:
http://www.15seconds.com/issue/010205.htm

hope this sends you in the right direction.

Karl
--
MY ASP.Net tutorials
http://www.openmymind.net/
"gv" <vi*****@musc.e du> wrote in message
news:O$******** ******@TK2MSFTN GP09.phx.gbl...

How would I do this part on the client side?

SmartNavigation didn't help.

thanks
Gerry
"Karl Seguin" <karl REMOVE @ REMOVE openmymind REMOVEMETOO . ANDME net>
wrote in message news:eS******** ******@TK2MSFTN GP11.phx.gbl...

Geez..so much for reading through everything....i didn't catch that at
all.

One solution is to do everything on the client-side...which has its up and down side.

Another one is to turn on SmartNavigation which only works in IE and some people have a lot of problems with it. Try putting SmartNaviation= true
in
the <%@ Page directive...
You should check out:
http://weblogs.asp.net/ksamaschke/ar...4/27/6085.aspx or just do a
google search for SmartNavigation

Other that that, it's the nature of doing web programming...

Karl

--
MY ASP.Net tutorials
http://www.openmymind.net/
"gv" <vi*****@musc.e du> wrote in message
news:Ox******** ******@TK2MSFTN GP09.phx.gbl...

If I do that, it works fine like I said but, flickers?

I don't want it to flicker when I do this.

thanks
gv
"Karl Seguin" <karl REMOVE @ REMOVE openmymind REMOVEMETOO . ANDME net>
wrote in message news:e5******** ******@TK2MSFTN GP09.phx.gbl...
> Gv:
> It works fine for me. Are you sure you have the AutoPostBack=tr ue for

the

> dropdownlist?
>
> karl
>
> --
> MY ASP.Net tutorials
> http://www.openmymind.net/
>
>
> "gv" <vi*****@musc.e du> wrote in message
> news:%2******** **********@TK2M SFTNGP12.phx.gb l...
>> Ok,
>>
>> Hi all, new to asp.net. Simple question
>>
>> with web forms
>>
>> I have a Dropdownlist and a listbox, I want to click on and item in
>> the
>> dropdownlist and show items in listbox. that simple
>>
>> I have this: I have two items in Dropdownlist. The Reportlist

doesn't >> show
>> the items ?
>>
>> I tried to set the Autopostback to true. This does work but, the page >> flickers
>>
>> Private Sub Databaselist_Se lectedIndexChan ged(ByVal sender As
>> System.Object, ByVal e As System.EventArg s) Handles
>> Databaselist.Se lectedIndexChan ged
>> If Databaselist.Se lectedValue = "Test1" Then
>>
>> ReportList.Item s.Clear()
>> ReportList.Item s.Add("Test1Tot als by Date Range")
>> ReportList.Item s.Add("Test1Tot als by name and Date Range") >>
>> ElseIf Databaselist.Se lectedValue = "Test2" Then
>>
>> ReportList.Item s.Clear()
>> ReportList.Item s.Add("Test2Tot als by Date Range")
>> ReportList.Item s.Add("Test2 Totals by name and Date
>> Range")
>>
>> End If
>> End Sub
>>
>>
>
>