Deleting multiple items in a listbox

[Seb]

I'm trying to make a button delete more than one item at the same time when they r all highlighted in a list box. Here's what I have so far:

 

Private Sub DelButton_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles DelButton.Click
       If LeftListBox.SelectedItems.Count <> 0 Then
           LeftListBox.Items.Remove(LeftListBox.SelectedItem)
           LeftTextBox.Focus()
           EnableDisableButtons()
       End If
       If RightListBox.SelectedItems.Count <> 0 Then
           RightListBox.Items.Remove(RightListBox.SelectedItem)
           LeftTextBox.Focus()
           EnableDisableButtons2()
       End If
   End Sub

 

Cheers

[samsmithnz]

I've used the list box quite a but now, and i believe that the listbox.items.selecteditems() collection contains all the selected items, and may be what you're looking for.

[Seb]

I've tried that but it only deletes one at a time in either list box.

[Seb]

HELP NEEDED!!

 

Anyone else have any ideas?

[samsmithnz]

Yeh but can't you loop through the selecteditems collection and delete all items in that collection?

[Seb]

How do I loop through the 'selecteditems' collection?

[Bucky]

Dim item As Object

For Each item In LeftListBox.SelectedItems
 LeftListBox.Items.Remove(item)
Next

[TheNaughty]

Dim item As Object

For Each item In LeftListBox.SelectedItems
 LeftListBox.Items.Remove(item)
Next

 

Doen't works in C# because the SelectedItems collection changes while looping through wich causes an error, anybody knows how to do it with a short code??

 

(The only working way i know right know is: )

object[] aItems = new object[listBox1.SelectedItems.Count];
listBox1.SelectedItems.CopyTo(aItems, 0);

foreach(object oDelItem in aItems)
{
listBox1.Items.Remove(oDelItem);
}

[samsmithnz]

Can't you try and delete the last (or first) item of the collection until you've looped through it all?

eg (Psuedocode)

while selecteditems is not nothing
   selecteditems.remove(0)
loop

[Jay1b]

------------------- Also -------------------

 

Seb

Newcomer

 

Registered: Nov 2003

Location:

Posts: 7

 

I've tried that but it only deletes one at a time in either list box.

 

12-03-2003 06:14 PM

 

------------AND----------------------------------------

 

Seb

Newcomer

 

Registered: Nov 2003

Location:

Posts: 7

HELP NEEDED!!

Anyone else have any ideas?

 

12-05-2003 06:33 PM

 

 

------------------------------------------------------------

 

19 minutes, isnt exactly a long time to leave it before you bump a thread. Leave a day or two in future, give people a chance to read your 'demands'.

 

Everyone here is very helpful, and will help you if they can - i have been helped to no-end myself. Just dont take the piss out of them.

[TheNaughty]

while selecteditems is not nothing
   selecteditems.remove(0)
loop

 

won't work because selecteditems doesn't contains a remove function.. And if it has it would be more logic that it would only deselect the items.

[sho]

for(int i = this.fileList.SelectedItems.Count - 1; i >= 0; i--)
this.fileList.Items.Remove(this.fileList.SelectedItems[0]);

[DiverDan]

Not to jump into the middle of this, but have you considered using a ListView as it does support removing multiple items?

[TheNaughty]

for(int i = listBox1.SelectedItems.Count - 1; i >= 0; i--)listBox1.Items.Remove(listBox1.SelectedItems[0]);

 

Thanks sho, that was the code i was lookin for.. After all it is so simple i should have thought it myself...