Why does this loop only seem to work on index 0?

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while (i < lbxcityTours.Items.Count)
                {
                    lbxcityTours.SelectedIndex = i;
                    if (lbxcityTours.SelectedItem.ToString() == t1)
                    {
                        work.Text = lbxcityTours.SelectedIndex.ToString();
                        lbxcityTours.SelectedItem.Value = "0";
                        //remove the selected item from the listbox
                        lstBoxAddedTours.Items.Remove(lstBoxAddedTours.SelectedItem);
                    }
                    i += 1;
                }

What I have tried:

My intention is to change the content of lbxcityTours.SelectedIndex i if it matches string t1
any ideas?

Posted 7-May-17 2:45am

Gerald McAuley

Updated 7-May-17 3:24am

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CHill60 · Accepted Answer · 2017-05-07T03:24:00

How bizarre! For the benefit of anyone else reading this, with a breakpoint on the line

C#

if (lbxcityTours.SelectedItem.ToString() == t1)

examining the value of lbxcityTours.SelectedIndex gives 0 for all values of i

I have no idea why that is happening, but I managed to stop it from misbehaving by ensuring nothing was selected at all before assigning to the SelectedIndex - i.e.

C#

lbxcityTours.SelectedIndex = -1; //Force the change to SelectedIndex
lbxcityTours.SelectedIndex = i;

Perhaps it's telling that Microsoft do not give an example of setting this value in the documentation, only getting it.