BulletedList排序

<div>
        <asp:Button ID="Button5" runat="server" Text="升序" CommandName="Sort"
            CommandArgument="ASC" oncommand="Button5_Command"
            onclick="Button5_Click" />
        <asp:Button ID="Button6" runat="server" Text="降序" CommandName="Sort" 
            CommandArgument="DESC" oncommand="Button5_Command"/>
        <br />
        <br />
        <asp:BulletedList ID="bltBooks" runat="server">
        </asp:BulletedList>
    </div>

 

 

 

private List<string> books = new List<string>();    protected void Page_Load(object sender,EventArgs e)    {        books.Add("C#");        books.Add("JAVA");        books.Add("sqlServer2005");            }    protected void Button5_Command(object sender,CommandEventArgs e)    {        if (e.CommandName == "Sort")        {            switch (e.CommandArgument.ToString())            {                case "ASC":                    books.sort(SortASC);                    break;                case "DESC":                    books.sort(SortDESC);                    break;            }        }    }    int SortASC(string x,string y)    {        return string.Compare(x,y);    }    int SortDESC(string x,string y)    {        return (string.Compare(x,y) * -1);    }    void Page_PreRender(object sender,EventArgs e)    {        bltBooks.DataSource = books;        bltBooks.DataBind();    }