I've been using listboxes for a long time with no problems but I have a
weird problem on a page that I can't figure out....
I'm filling a listbox, as usual with a dataset but when the user selects
some entries, other entries get returned instead of the one selected. Also,
some items in the list don't trigger the SelectedIndexCh anged event and this
is repeatable - the same items always fail to generate an event. All of
this seems to start after about the 200th entry in the listbox.
Does anyone have a clue as to what could cause this?
Thanks,
Dean 1 880
Hello Dean, I'm filling a listbox, as usual with a dataset but when the user selects some entries, other entries get returned instead of the one selected. Also, some items in the list don't trigger the SelectedIndexCh anged event and this is repeatable - the same items always fail to generate an event. All of this seems to start after about the 200th entry in the listbox.
I ran into a similar issue and what was happening for me was that the ValueMember property didnt contain unique values. It appears that the SelectedIndexCh anged event only gets fired if the <option value=""> portion is unique.
--
Matt Berther http://www.mattberther.com This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
by: Brian |
last post by:
Hi, All,
I'm using MS.net 2003 and using a windows.forms.listbox control for my
window application but I don't know why the Horizontal Scrollbar could NOT be
shown even if I set HorizontalScrollbar = true. The text info in listbox
already beyond its right edge. How can I see the hidden part info in listbox?
here is a part of codes.
ListBox.ValueMember = XX
ListBox.DisplayMember = XXXX
|
by: Bill |
last post by:
I have have two list boxes. One is a listing of all possible variables.
We'll call this listbox A. The other is a listing of all the selected
variables. We'll call this listbox B. If a person double-clicks on one of
the variables in listbox A it "moves" it to listbox B. What is going on
behind the scenes is that the table that holds all these variables has a
yes/no field call Print. When the user double clicks on the value it fires
a...
|
by: martin |
last post by:
I have a problem with editor. In MDI parent I have defined several public
static controls (imagelist,listbox etc). From time to time, when I attempt
to compile program it fails because editor changes "public static" to
"public" and changes
all initialization entries of those controls to "this."
Is there a problem with declaring controls as public static or what?
I am tired of copy-pasting code back.
|
by: Dean |
last post by:
I've been using listboxes for a long time with no problems but I have a
weird problem on a page that I can't figure out....
I'm filling a listbox, as usual with a dataset but when the user selects
some entries, other entries get returned instead of the one selected. Also,
some items in the list don't trigger the SelectedIndexChanged event and this
is repeatable - the same items always fail to generate an event. All of
this seems to...
|
by: yamne |
last post by:
I have a problem.
When I click in edit datagrid button I show two listbox and two button.
I use two button to move data between two listbox.
My problem is that I can't call the listbox in the button_click function
because the only way to find the listbox is:
(listbox)e.item.findcontrol
What s the solution to this problem?
| |
by: Ron |
last post by:
I've got a listbox that holds a list of groups. Users can
select a group, hit the remove button and the group
should be removed from the listbox. The only problem is
that no matter which group you select, the first one in
the listbox is always removed.(The listitem with an index
of 0. Box is set to single selection mode) I've looked at
multiple examples and they all do it this way. What's
wrong? (variables are also being set to the values...
|
by: nirdeshonline |
last post by:
Hi,
I have added a simple listbox in windows form under c# 2.0. It contains
a collection of approx 10 strings as list items. Now when i resize the
form whole listbox flickers.
Please tell me any feasible solution, i need to use a checked listbox
which also has same flickering problem on resize.
Thanks & Regards
|
by: zdrakec |
last post by:
Hello all:
Clearly, I'm not getting it! Here is the scenario:
On a web page, I have two list boxen and a text box. The first listbox
is populated at page load time (if it is not a postback). This listbox
has AutoPostback = True. When the user selects an item from this list,
the second listbox is populated with more items relevant to this
selection. I am using an SQLDataSource web control for this. These
items are headers. I want, when...
|
by: =?Utf-8?B?SmVzcGVyLCBEZW5tYXJr?= |
last post by:
Hi,
On a simple form, I have a ListBox control. This listbox control is loaded
with around 800 text items of somewhat short length. There are also some
other controls on the form, buttons. When the form need to repaint itself
after e.g. maximize, it happens somewhat slow, I can see the buttons redrawn
one by one. I realy do not understand why. If I load twice the amount of text
into the list control, the form repaint itself twice as...
|
by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
|
by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it.
First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
| |
by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed.
This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
|
by: Hystou |
last post by:
Overview:
Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
|
by: tracyyun |
last post by:
Dear forum friends,
With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
|
by: agi2029 |
last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own....
Now, this would greatly impact the work of software developers. The idea...
|
by: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM).
In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules.
He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms.
Adolph will...
|
by: TSSRALBI |
last post by:
Hello
I'm a network technician in training and I need your help.
I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs.
The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols.
I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
| |
by: bsmnconsultancy |
last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...
| |