1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46
|
protected void Button1_Click(object sender, EventArgs e)
{
ListItem[] list = new ListItem[DropDownList1.Items.Count];
DropDownList1.Items.CopyTo(list, 0);
Array.Sort<ListItem>(list, CompareListItemValues);
DropDownList1.Items.Clear();
DropDownList1.Items.AddRange(list);
}
private int CompareListItemValues(ListItem x, ListItem y)
{
if (x.Value == null)
{
if (y.Value == null)
{
return 0;
}
else
{
return -1;
}
}
else
{
if (y.Value == null)
{
return 1;
}
else
{
int retval = x.Value.Length.CompareTo(y.Value.Length);
if (retval != 0)
{
return retval;
}
else
{
return x.Value.CompareTo(y.Value);
}
}
}
} |
Partager