CODEWITHSUNDEEP
c#winformslistview
Murhaf Sousli
Murhaf Sousli

Reputation: 13296

how to change an item index in listview?

I have a listView and two buttons (UP , DOWN) and i want to move the selected item up or down.
I've thought about swapping between the selected item and the upper one.. but the code i tried .. doesn't make sense because index is readonly.
also mines or sum doesn't owrk .. i can't mess with index at all.

private void btnDown_Click(object sender, EventArgs e)
    {
         listView1.SelectedItems[0].Index--; // It's ReadOnly.
    }


So .. how do i let the user the ability to change a ListViewItem index like how VB let us to change these item index [like in the pic]

enter image description here

thanks in advance ...

Upvotes: 6

Views: 20405

Answers (3)

ISAF
ISAF

Reputation: 71

In case of observable collections you are also able to call: .Move(currentindex, newindex);

MSDN

Upvotes: 0

al000y
al000y

Reputation: 139

Following is an improvement to M4N answer to handle the re order of an item in the top of the list and make it in the bottom of the list

int currentIndex = listView1.SelectedItems[0].Index;
ListViewItem item = listView1.Items[currentIndex];
if (currentIndex > 0)
{
    listView1.Items.RemoveAt(currentIndex);
    listView1.Items.Insert(currentIndex - 1, item);
}
else
{
    /*If the item is the top item make it the last*/
    listView1.Items.RemoveAt(currentIndex);
    listView1.Items.Insert(listView1.Items.Count, item);
}

Upvotes: 0

M4N
M4N

Reputation: 96551

You have to remove the selected item first, then re-add it at the new position.

E.g to move the item up one position:

var currentIndex = listView1.SelectedItems[0].Index;
var item = listView1.Items[index];
if (currentIndex > 0)
{
    listView1.Items.RemoveAt(currentIndex);
    listView1.Items.Insert(currentIndex-1, item);
}

Upvotes: 15

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