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aspx_beginners thread: myListBox.SelectedItem is always null
Message #1 by "Minh T. Nguyen" <nguyentriminh@y...> on Wed, 13 Feb 2002 14:20:07 -0800
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Hello there,
I have a ListBox control and a button on my form. In the
button's click event I reference the myListBox.SelectedItem property,
but it turns out that this property is null, even though I have clearly
selected an item in the list box. At the same time,
myListBox.SelectedIndex is always -1.
The myListBox has EnableViewState set to true. What am I
missing?
Thanks,
Minh.
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Message #2 by "McCloy, Russell" <Russell.McCloy@B...> on Thu, 14 Feb 2002 09:33:20 +1100
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Hi Minh,
I have references ListBox selectedItem properties using:
lsMatterType = lstMatterType.SelectedItem.text
lsDisbType = lstDisbtype.selectedItem.value
Value or text.
Hope this helps.
RuSs
-----Original Message-----
From: Minh T. Nguyen [mailto:nguyentriminh@y...]
Sent: Thursday, 14 February 2002 9:20 AM
To: aspx_beginners
Subject: [aspx_beginners] myListBox.SelectedItem is always null
Hello there,
I have a ListBox control and a button on my form. In the
button's click event I reference the myListBox.SelectedItem property,
but it turns out that this property is null, even though I have clearly
selected an item in the list box. At the same time,
myListBox.SelectedIndex is always -1.
The myListBox has EnableViewState set to true. What am I
missing?
Thanks,
Minh.
_________________________________________________________
Do You Yahoo!?
Get your free @yahoo.com address at http://mail.yahoo.com
$subst('Email.Unsub').
Message #3 by "Minh T. Nguyen" <nguyentriminh@y...> on Wed, 13 Feb 2002 14:34:32 -0800
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Russ,
That's what I did at the beginning and I received a
NullPointerException since lstMatterType.SelectedItem was null. Hm..
I'll just have to continue playing with it.
Thanks,
Minh.
-----Original Message-----
From: McCloy, Russell [mailto:Russell.McCloy@B...]
Sent: Wednesday, February 13, 2002 2:33 PM
To: aspx_beginners
Subject: [aspx_beginners] RE: myListBox.SelectedItem is always null
Hi Minh,
I have references ListBox selectedItem properties using:
lsMatterType = lstMatterType.SelectedItem.text
lsDisbType = lstDisbtype.selectedItem.value
Value or text.
Hope this helps.
RuSs
_________________________________________________________
Do You Yahoo!?
Get your free @yahoo.com address at http://mail.yahoo.com
Message #4 by "McCloy, Russell" <Russell.McCloy@B...> on Thu, 14 Feb 2002 09:44:16 +1100
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interesting! Is there a chance that you are referencing the list
box before it is fully loaded? Now Im really guessing!
This shouldn't really be the case though as ASP.NET is OO and compiled
unlike a script.
I give up.
sorry
RuSs
-----Original Message-----
From: Minh T. Nguyen [mailto:nguyentriminh@y...]
Sent: Thursday, 14 February 2002 9:35 AM
To: aspx_beginners
Subject: [aspx_beginners] RE: myListBox.SelectedItem is always null
Russ,
That's what I did at the beginning and I received a
NullPointerException since lstMatterType.SelectedItem was null. Hm..
I'll just have to continue playing with it.
Thanks,
Minh.
-----Original Message-----
From: McCloy, Russell [mailto:Russell.McCloy@B...]
Sent: Wednesday, February 13, 2002 2:33 PM
To: aspx_beginners
Subject: [aspx_beginners] RE: myListBox.SelectedItem is always null
Hi Minh,
I have references ListBox selectedItem properties using:
lsMatterType = lstMatterType.SelectedItem.text
lsDisbType = lstDisbtype.selectedItem.value
Value or text.
Hope this helps.
RuSs
_________________________________________________________
Do You Yahoo!?
Get your free @yahoo.com address at http://mail.yahoo.com
$subst('Email.Unsub').
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