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by: jean |
last post by:
hi:
i am developing a custom combobox for my company's needs that is made
up of a textbox, listbox, button. i am using c#. everything is fine
except for one issue.
in a normal combobox, when the dropdown is visible and the user clicks
anywhere else, the dropdown gets hidden. i am trying to replicate
this behavior and have tried using the Leave and LostFocus events. i
have had marginal success when my dropdown is visible and i...
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by: Judy |
last post by:
How do I create a combobox in a custom menubar to display months like:
1 January
2 February
3 March
etc
and then assign the month number (1, 2, 3, etc) of the selected month to a
textbox on a form?
Thanks for all help!
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by: metamedia |
last post by:
How do I get a datagrid to register a data change from a custom control cell (combobox)
I've got a Windows Application with a Windows Form Datagrid that has a custom combobox column. When the user clicks on a new row in the datagrid and tries to select or enter a new value in the combobox, the datagrid doesn't seem to register the change, so if the user tabs through the columns and onto the next row, the data is cleared and not saved
Does...
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by: John B |
last post by:
Hello
I want to create a set of controls that have some common methods and
properties. I was thinking that I should subclass the UserControl class and
add these common features there and then base all my custom controls on this
new MyUserControl Class. Is this the way to go?
The MyUserControl would not actually have any UI component and should be
abstract I think. Does this mena that I should not create the control by
just selecting...
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by: Flack |
last post by:
Hello,
I am beginning to write a custom combobox control. Right now it doesn't do
anything special. I created a class that extends ComboBox:
public class TimeSelector : System.Windows.Forms.ComboBox
and in its constructor I call Populate:
public TimeSelector()
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by: Marty Cruise |
last post by:
I have a custom collection which contains instances of a
custom class. With me so far?
OK, now I set the datasource of a combobox to the
collection, having overridden the ToString() function of
the custom class to return one of its text properties.
Life is good.
The first of two problems involves the combobox showing
the first item in the collection. To get around this,
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by: ross kerr |
last post by:
Hi All,
I am extending the combobox to create a control that
selects an item based on the text the user is typing into
the text area of the control.
I have an issue that occurs only when i drop down the
combo box as the users typing.
When the on leave event is fired the value in the selected
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by: Don |
last post by:
I've been trying to create a custom collection that can be bound to a
combobox via the DataSource property, but I can't seem to get it to work.
I've created a class that implements IList, and it seems to work okay on its
own, but when I try to bind it to a combobox, the combobox doesn't show
anything (and it starts having problems repainting itself). The Datasource
appears to contain my custom collection object, but when I ask for its item...
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by: mongphong28 |
last post by:
Hi,
I'm populating a ComboBox with objects which contain two properties -
IntegerValue and StringValue. I display StringValue in the ComboBox
form and can retrieve IntegerValue from the SelectItem.IntegerValue
property. This is all good but now I want to get a little bit more
complicated.
I want to be able to set the ComboBox's SelectedItem property by
setting IntegerValue, so for instance if I have the following items in
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by: g_man |
last post by:
I am trying trap Runtime error 3022 (duplicates) in the click event of
a command button that closes the form. I have code in the Form_Error
event that does a good job of providing a more meaningful error message
than the default. It works in every situation except when the user
clicks the close button. I am using Me.Dirty=False to force a save but
if there are duplicates I just get the standard Runtime 3022 error
message. I am wondering...
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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...
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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,...
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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...
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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,...
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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...
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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...
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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...
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by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
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by: 6302768590 |
last post by:
Hai team
i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
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