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by: Fred |
last post by:
Hi,
I am having a problem setting a combobox value in code on form load using
comboBox.SelectedValue method. The code below when debugging show the
combobox equal to an undefined value. The value I am trying to set is
present the items collection. I also have tried using .SelectedItem method
and I get an object reference error. Any ideas?
comboBox.SelectedValue = comboBoxValue;
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by: Bob |
last post by:
Its often necessary to allow the user to remove a selection from a combox.
In my case, most are bound to lookup tables. I suppose I could, in each
lookup table create an empty record and have in the combobox when its being
filled but there are several reasons why this is not a desirable approach
one is that I would often have to set allownull in the datatable design when
I really need a value. So I need to be able to allow user to simply...
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by: Matt |
last post by:
I have been searching all over the web for a way to sort a DataGridView based on
the actual text being shown in a ComboBox column as opposed to the underlying
value (an ID in this case). Can anyone tell me if this is even possible, and if
so, how to do it? If this is completely impossible, how would you suggest going
about sorting a ComboBox wherein the text displayed in the column is the
client's name, and the underlying value is an ID?
...
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by: Greg |
last post by:
I've populated all the cells in a combo box column with values from 1 -
50 using the following code:
foreach (DataGridViewRow row in uxTabSummary.Rows)
{
DataGridViewComboBoxCell cell = (DataGridViewComboBoxCell)
row.Cells;
for (int i = 1; i < 51; i++)
{
cell.Items.Add(i);
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by: sklett |
last post by:
I'm changing from a DataGrid to a DataGridView and have run across a
problem. The items that are bound to the DataGrid have an int Property that
represents a primary key of a lookup table in my database. For example:
table JobTypes
1 | Manager
2 | Controller
3 | Supervisor
table Employee
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by: Terry Olsen |
last post by:
I have a Datagridview that is bound to a DataTable. So there are no
column templates to modify at design time.
Is there a way I can convert a certain column (if it exists) to a
ComboBoxColumn at runtime after the Datagridview is bound?
*** Sent via Developersdex http://www.developersdex.com ***
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by: Bhavanimikkilineni |
last post by:
H,
At this moment my problem is how to make suplier combobox has different list in every row. I want suplier lists that related with a certain product instead of providing all the supliers.
Let say "product A" only has "Suplier B", "Suplier D" and "Suplier E",
"Product B" only has "Suplier A", "Suplier C", and
"Product C" only has "Suplier B", "Suplier D".
I can provide store procedure for this, but I don't know how to put this different...
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by: priyamtheone |
last post by:
I'm trying to make a datagridview column to act like a datetimepicker column (C#.Net 2005). These are the behaviours that the dgv should have:
1) Initially all the cells of the dtp column should be blank unless they are filled by the user.
2) As soon as the user enters a cell, the dtp control should appear as the editing control of that cell. If there's a value in the cell beforehand, that value is set as the value of the dtp editing control...
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by: Motawee |
last post by:
i am making a windows form application that contains a datagridview that is filled with employees names
the program is for the attendance absence holidays of employees in the company
so i created a combobox column in the datagridview beside the holiday checkbox so when the dataentry check the holiday checkbox he can choose what type of holiday is this to subtract it from the employee holiday counter
i need to fill this combobox column...
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by: Chris Bray |
last post by:
I have a data grid view which works very well in almost all respects. However, I have a problem that arises when I allow the addition of items to the grid on the fly. I do this by intercepting the OnEditingControlShowing handler and setting the DropDownStyle to ComobBoxStyle.DropDown:
protected override void OnEditingControlShowing(DataGridViewEditingControlShowingEventArgs e)
{
cb = e.Control as ComboBox;
...
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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: 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: 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...
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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: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
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