Hello:

I'm pulling out my little remaining hair again. I have a list box with about 8 items, the selected item is highlighted at the top of the list. I press a button (cmdMoveDown) and wish to move the selected item 1 item down the list.

I tried this:

public void MoveDown()
{
     int index = this.lstSelected.SelectedIndex;
     int newindex = index + 1;

     DataTable dtSelect = (DataTable)this.lstSelected.DataSource;
     DataRow dr = dtSelect.Rows[index];

     dtSelect.Rows.Remove(dr);
     dtSelect.Rows.InsertAt(dr, newindex);
}

this removes the item at index 0 just fine. But the select doesn't happen and there is a blank line at the bottom of the list.


then i tried this variation:

public void MoveDown()
{
     int index = this.lstSelected.SelectedIndex;
     int newindex = index + 1;

     DataTable dtSelect = (DataTable)this.lstSelected.DataSource;
     DataRow dr = dtSelect.Rows[index];
     DataRow drNew = dtSelect.NewRow();

     foreach(DataColumn dc in dtSelect.Columns)
        drNew[dc.ColumnName] = dr[dc.ColumnName];

     dtSelect.Rows.Remove(dr);
     dtSelect.Rows.InsertAt(drNew, newindex);
}

this variation removed the selected item and added it at the end of the list rather than at new index.

I tried various permutations of this code and could get nothing to work.  Any suggestions?