ASP.NET using C# - Sorting DropDownList by Text or Value

Original - C# Code #region sorting methods public static void SortByValue(ListControl combo) { SortCombo(combo, new ComboValueComparer()); } public static void SortByText(ListControl combo) { SortCombo(combo, new ComboTextComparer()); } #endregion #region Private Methods - for internal use private static void SortCombo(ListControl combo, IComparer comparer) { int i; if (combo.Items.Count <= 1) return; ArrayList arrItems=new ArrayList(); for (i=0; i<combo.Items.Count; i++) { ListItem item=combo.Items[i]; arrItems.Add(item); } arrItems.Sort(comparer); combo.Items.Clear(); for (i=0; i<arrItems.Count; i++) { combo.Items.Add((ListItem) arrItems[i]); } } #region Combo Comparers /// <summary> /// compare list items by their value /// </summary> private class ComboValueComparer : IComparer { public enum SortOrder { Ascending=1, Descending=-1 } private int _modifier; public ComboValueComparer() { _modifier = (int) SortOrder.Ascending; } public ComboValueComparer(SortOrder order) { _modifier = (int) order; } //sort by value public int Compare(Object o1, Object o2) { ListItem cb1=(ListItem) o1; ListItem cb2=(ListItem) o2; return cb1.Value.CompareTo(cb2.Value)*_modifier; } } //end class ComboValueComparer /// <summary> /// compare list items by their text. /// </summary> private class ComboTextComparer : IComparer { public enum SortOrder { Ascending=1, Descending=-1 } private int _modifier; public ComboTextComparer() { _modifier = (int) SortOrder.Ascending; } public ComboTextComparer(SortOrder order) { _modifier = (int) order; } //sort by value public int Compare(Object o1, Object o2) { ListItem cb1=(ListItem) o1; ListItem cb2=(ListItem) o2; return cb1.Text.CompareTo(cb2.Text)*_modifier; } } //end class ComboTextComparer #endregion #endregion

 
#region sorting methods
public static void SortByValue(ListControl combo)
{
    SortCombo(combo, new ComboValueComparer());
}
 
public static void SortByText(ListControl combo)
{
    SortCombo(combo, new ComboTextComparer());
}
#endregion
 
#region Private Methods - for internal use
private static void SortCombo(ListControl combo, IComparer comparer)
{
    int i;
    if (combo.Items.Count <= 1)
        return;
    ArrayList arrItems=new ArrayList();
    for (i=0; i<combo.Items.Count; i++)
    {
        ListItem item=combo.Items[i];
        arrItems.Add(item);
    }
    arrItems.Sort(comparer);
    combo.Items.Clear();
    for (i=0; i<arrItems.Count; i++)
    {
        combo.Items.Add((ListItem) arrItems[i]);
    }
}
 
#region Combo Comparers
/// <summary>
/// compare list items by their value
/// </summary>
private class ComboValueComparer : IComparer
{
    public enum SortOrder
    {
        Ascending=1,
        Descending=-1
    }
 
    private int _modifier;
 
    public ComboValueComparer()
    {
        _modifier = (int) SortOrder.Ascending;
    }
 
    public ComboValueComparer(SortOrder order)
    {
        _modifier = (int) order;
    }
 
    //sort by value
    public int Compare(Object o1, Object o2)
    {
        ListItem cb1=(ListItem) o1;
        ListItem cb2=(ListItem) o2;
        return cb1.Value.CompareTo(cb2.Value)*_modifier;
    }
} //end class ComboValueComparer
 
/// <summary>
/// compare list items by their text.
/// </summary>
private class ComboTextComparer : IComparer
{
    public enum SortOrder
    {
        Ascending=1,
        Descending=-1
    }
 
    private int _modifier;
 
    public ComboTextComparer()
    {
        _modifier = (int) SortOrder.Ascending;
    }
 
    public ComboTextComparer(SortOrder order)
    {
        _modifier = (int) order;
    }
 
    //sort by value
    public int Compare(Object o1, Object o2)
    {
        ListItem cb1=(ListItem) o1;
        ListItem cb2=(ListItem) o2;
        return cb1.Text.CompareTo(cb2.Text)*_modifier;
    }
} //end class ComboTextComparer
#endregion
#endregion