Dear all,
I have a very simple question.
I have a listbox with datasource, where DataSource is an arraylist.
I.e. MyListbox.DataS ource=MyDataSou rce.
Now I add/remove something to DataSource, i.e.
MyDataSource.Ad d("XXX")/MyDatasource.Re move("YYY")
I would expect that this XXX is shown in a Listbox/YYY deleted from a
listbox, but it is not the case.
How do force a ListBox to reread DataSource
Thanks ,
Boni
4  1585 
Set the listbox datasource to Nothing and re-attach.
"Boni" <oilia@nospam > wrote in message
news:%2******** ********@TK2MSF TNGP14.phx.gbl. .. Dear all,
I have a very simple question.
I have a listbox with datasource, where DataSource is an arraylist.
I.e. MyListbox.DataS ource=MyDataSou rce.
Now I add/remove something to DataSource, i.e.
MyDataSource.Ad d("XXX")/MyDatasource.Re move("YYY")
I would expect that this XXX is shown in a Listbox/YYY deleted from a
listbox, but it is not the case.
How do force a ListBox to reread DataSource
Thanks ,
Boni
"Boni" <oilia@nospam > schrieb: How do force a ListBox to reread DataSource
\\\
Private m_Data As New ArrayList
Private Sub Form1_Load( _
ByVal sender As Object, _
ByVal e As EventArgs _
) Handles MyBase.Load
m_Data.Add("Hel lo")
Me.ListBox1.Dat aSource = m_Data
End Sub
Private Sub Button1_Click( _
ByVal sender As Object, _
ByVal e As EventArgs _
) Handles Button1.Click
m_Data.Add("Bla ")
DirectCast( _
Me.ListBox1.Bin dingContext(Me. ListBox1.DataSo urce), _
CurrencyManager _
).Refresh()
End Sub
///
--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://classicvb.org/petition/>
Dear Herfried,
What is CurrencyManager ? Is it arraylist?I can'find any refresh member in
listbox DirectCast( _
Me.ListBox1.Bin dingContext(Me. ListBox1.DataSo urce), _
CurrencyManager _
).Refresh()
--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://classicvb.org/petition/>
"Boni" <oilia@nospam > schrieb: What is CurrencyManager ? Is it arraylist?I can'find any refresh member in
listbox DirectCast( _
Me.ListBox1.Bin dingContext(Me. ListBox1.DataSo urce), _
CurrencyManager _
).Refresh()
'CurrencyManage r' is a class which is part of the .NET Framework.
--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://classicvb.org/petition/> This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
by: amber |
last post by:
Hello.
Can someone tell me what I may be doing wrong here?
I'm using the code (lboxRP is a listbox):
Dim newRPindex As Integer
newRPindex = Me.lboxRP.FindString(RP)
Me.lboxRP.SetSelected(newRPindex, True)
When the last line executes, I get an error message:
|
by: Paul T. Rong |
last post by:
I have a listbox (of product names) control on my form. I want to pass the
selected item (a product name) to a subform, and the product unitprice
should apear automatically next to the product name in the subform. Is it
possible? How do I do this? Thanks in advance.
Paul from Slovakia
|
by: Oddball |
last post by:
Ok - I have a ListBox control and I'm ready to write my own DrawItem event handler.
What I want to draw as the item is another control. I have created a user control that I
would like to list in this listbox but I can't for the life of me figure out how to draw the
control inside ListBox...
I get as far as:
private void lbImageList_DrawItem(object sender,
System.Windows.Forms.DrawItemEventArgs e)
|
by: collie |
last post by:
Hi,
I have 2 listboxes. The first gets populated from the db as soon as
the page loads. The second listbox get populated based on the user's
selection from the first listbox. However, currently the code is
such that with each selection there is a postback. We want to avoid it
using filter and javascript. I am not using ADO.NET but adodbc and no
datagrids or datasets (please don't tell me that i should as my boss
clearly doesn't want...
|
by: Chris Leuty |
last post by:
I am populating a multiselect Listbox from a dataset, with the content of
the listbox filled by one table, and the selections determined from another
table. So far, I have been keeping the dataset a denormalized mirror of the
database, but I'm not having much luck getting the selection logic down (I
haven't found a 'hook' where I can access the listbox object as an object to
set the listitem's selected property before it gets rendered)..
...
| | |
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: Dave |
last post by:
Hi all,
After unsuccessfully trying to make my own dual listbox control out of
arraylists, I decided to look for a 3rd party control. I've looked for over
a week now and can't find anything but ASP.Net stuff when I need a Windows
Form control. I've seen dual listbox populators in countless Windows
applications, and have seen them run very fast, so I figured this would be
extremely popular.
Here's how it should work:
|
by: Ali Chambers |
last post by:
Hi,
I have created a listbox called "dtlist1" on my VB.NET form. I call a
procedure as follows:
Private Sub openfile(flname As String)
dtlist1.Items.Clear()
etc..
|
by: Sunray |
last post by:
I have a form called the sales form and i have 2 sets of listboxes
So what happens is. i add items form the bottom set of list boxes which are bound to a data base to the top set of list boxes which are not bound, I select from the bottom set and add to the top set which works fine, but now i decide to remove an item from the top set.
when i tried to use a remove item code it worked fine, it did delete the item form the list but it added...
|
by: Academia |
last post by:
(If you've seen this in the drawing NG, sorry. I inadvertently sent it
there.)
I have a listbox populated with Objects.
The Class has a String field that ToString returns.
I assume that is what the ListBox uses for its display. Correct?
|
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: conductexam |
last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one.
At the time of converting from word file to html my equations which are in the word document file was convert into image.
Globals.ThisAddIn.Application.ActiveDocument.Select();...
|
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: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
|
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
| | |
by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
|
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...
| |
