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Moving items in a Listview object

Posted on 2004-03-27
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Last Modified: 2012-06-21
Greetings all

I have a problem here which involves a ListView object, filled with ListViewItems. This may be a very easy problem for some of you guys on here...

What i need is a way to move the selected ListViewItem up and down in the ListView object.

I have two buttons, marked "Move up", and "Move down".

Some help would be very cool

Tchau!!

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Question by:TheBOI
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5 Comments
 
LVL 15

Expert Comment

by:Timbo87
ID: 10697507
Here's an example using ListBox1.

Move Up:

Dim temp As Object
Dim i As Integer = ListBox1.SelectedIndex
If i - 1 < 0 Then
    Exit Sub
End If
temp = ListBox1.Items(i)
ListBox1.Items(i) = ListBox1.Items(i - 1)
ListBox1.Items(i - 1) = temp
ListBox1.SelectedIndex = i - 1

Move Down:

Dim temp As Object
Dim i As Integer = ListBox1.SelectedIndex
If i + 1 > ListBox1.Items.Count - 1 Then
    Exit Sub
End If
temp = ListBox1.Items(i)
ListBox1.Items(i) = ListBox1.Items(i + 1)
ListBox1.Items(i + 1) = temp
ListBox1.SelectedIndex = i + 1
0
 
LVL 15

Expert Comment

by:Timbo87
ID: 10697522
C#

Move Up:

object temp;
int i = ListBox1.SelectedIndex;
if(i - 1 < 0)
       return;
temp = ListBox1.Items[i];
ListBox1.Items[i] = ListBox1.Items[i - 1];
ListBox1.Items[i - 1] = temp;
ListBox1.SelectedIndex = i - 1;

Move Down:

object temp;
int i = ListBox1.SelectedIndex;
if(i + 1 < 0)
      return;
temp = ListBox1.Items[i];
ListBox1.Items[i] = ListBox1.Items[i + 1];
ListBox1.Items[i + 1] = temp;
ListBox1.SelectedIndex = i + 1;
0
 
LVL 15

Accepted Solution

by:
Timbo87 earned 80 total points
ID: 10697532
Oops, small problem in move down in C#. Here is the correct code:

Move Down:

object temp;
int i = ListBox1.SelectedIndex;
if(i + 1 > ListBox1.Items.Count - 1)
     return;
temp = ListBox1.Items[i];
ListBox1.Items[i] = ListBox1.Items[i + 1];
ListBox1.Items[i + 1] = temp;
ListBox1.SelectedIndex = i + 1;
0
 

Author Comment

by:TheBOI
ID: 10697611
Ah ok, thats great, i understand how that works.  I really should have specified that platform i am using.  

The problem is i am using VB.Net, and the control is a Listview object, not a Listbox (although i am aware they are similar).

Any chance you know how to do this for a Listview?
0
 
LVL 10

Expert Comment

by:EBatista
ID: 10700026
for listview the timbo's code is valid, just replace Listbox.SelectedIndex for ListView1.SelectedItem.Index
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