ListBox select all items c#

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For everyone who is interested:

I opened a support ticket and learned, that the development team is aware of this performance issue with large multi-select ListBox.

Numeric values in ItemsData [instead of Items], should be slightly faster [~20% faster] than using Items if this is a high frequency workflow.

app = struct;

app.ListBox = uilistbox['Items', "Items" + [1:1000]];

app.ListBox.Multiselect = 'on';

app.ListBox.ItemsData = 1:1000;

tic

ItemsData = app.ListBox.ItemsData;

ReadItemsTime = toc;

tic

app.ListBox.Value = ItemsData;

WriteValueTime = toc;

disp[['Read items from the list box: ' num2str[ReadItemsTime] ' s']]

disp[['Write items to the Value variable: ' num2str[WriteValueTime] 's']]

1. Jun 6th, 2006, 08:51 AM #1

   hi everybody.... i want to know how to select all the items in the listbox through code... similar to select all. i have it's equallent code in visual basic 6.0. --------------------------------- dim i as integer For i = 0 To List1.ListCount - 1 List1.Selected[i] = True Next ---------------------------------

   can any one do..

2. Jun 6th, 2006, 08:56 AM #2

3. Jun 7th, 2006, 02:11 AM #3

   Originally Posted by jmcilhinney

   You use the SetSelected method of the ListBox for each item.

   Thaks for your reply jmcilhinney.. i have another doubt.

   how to make invert selection in a listbox through code?

4. Jun 7th, 2006, 02:28 AM #4

   VB Code:

   1. Me.ListBox1.BeginUpdate[]

   3. For index As Integer = 0 To Me.ListBox1.Items.Count - 1 Step 1

   4.     Me.ListBox1.SetSelected[index, Not Me.ListBox1.GetSelected[index]]

   The BeginUpdate and EndUpdate calls should be used if you're using VB 2005 but they are not available in previous versions. Please specify your version whenever you start a thread in future.

5. Jun 7th, 2006, 05:19 AM #5

   Originally Posted by jmcilhinney

   VB Code:

   1. Me.ListBox1.BeginUpdate[]

   3. For index As Integer = 0 To Me.ListBox1.Items.Count - 1 Step 1

   4.     Me.ListBox1.SetSelected[index, Not Me.ListBox1.GetSelected[index]]

   The BeginUpdate and EndUpdate calls should be used if you're using VB 2005 but they are not available in previous versions. Please specify your version whenever you start a thread in future.

   I use Dotnet 2003. There is no begin update and endupdate in 2003. But the for loop works. It's nice.

   Thanks for ur reply.

   Last edited by softkans; Jun 7th, 2006 at 05:23 AM.

Jonesgj

Chaps, How would I select all items in a listbox using code? I'm sure its an easy one but .... Thanks

3 40499

Armin Zingler

"Jonesgj" schrieb

How would I select all items in a listbox using code?

I'm sure its an easy one but ....

For i As Integer = 0 To Me.ListBox1.Items.Count - 1 Me.ListBox1.SetSelected[i, True] Next -- Armin

Herfried K. Wagner [MVP]

Hello,

"Jonesgj" schrieb:

How would I select all items in a listbox using code?

Set the ListBox's 'SelectionMode' to 'MultiSimple' or 'MultiExtended', then you can use this code: \\\ Dim i As Integer For i = 0 To Me.ListBox1.Items.Count - 1 Me.ListBox1.SetSelected[i, True] Next i /// -- Herfried K. Wagner MVP · VB Classic, VB.NET

//www.mvps.org/dotnet

Jonesgj

Thanks Armin. "Armin Zingler" wrote in message

news:%2****************@TK2MSFTNGP12.phx.gbl...

"Jonesgj" schrieb

How would I select all items in a listbox using code?

I'm sure its an easy one but ....

For i As Integer = 0 To Me.ListBox1.Items.Count - 1 Me.ListBox1.SetSelected[i, True] Next --

Armin

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