Make DropDownList work as ListBox in ASP.Net

Here I have created sample.When we use DropDown we need to set attribute multiple="multiple".

HTML

<div>
    <div>
        <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
        <link href="http://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.0.3/css/bootstrap.min.css"
            rel="stylesheet" type="text/css" />
        <script type="text/javascript" src="http://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.0.3/js/bootstrap.min.js"></script>
        <link href="http://cdn.rawgit.com/davidstutz/bootstrap-multiselect/master/dist/css/bootstrap-multiselect.css"
            rel="stylesheet" type="text/css" />
        <script src="http://cdn.rawgit.com/davidstutz/bootstrap-multiselect/master/dist/js/bootstrap-multiselect.js"
            type="text/javascript"></script>
        <script type="text/javascript">
            $(function () {
                $('[id*=ddlFruits]').multiselect({
                    includeSelectAllOption: true
                });
            });
        </script>
        <asp:DropDownList ID="ddlFruits" runat="server" multiple="multiple">
            <asp:ListItem Text="Mango" Value="1" />
            <asp:ListItem Text="Apple" Value="2" />
            <asp:ListItem Text="Banana" Value="3" />
            <asp:ListItem Text="Guava" Value="4" />
            <asp:ListItem Text="Orange" Value="5" />
        </asp:DropDownList>
        <asp:Button ID="Button1" Text="Submit" runat="server" OnClick="Save" />
        <br />
        <br />
        <asp:GridView ID="gvFruits" runat="server" AutoGenerateColumns="true" />
    </div>
</div>

C#

protected void Save(object sender, EventArgs e)
{
    DataTable FruitTable = new DataTable();
    FruitTable.Columns.AddRange(new DataColumn[2] { new DataColumn("Id", typeof(int)), new DataColumn("FruitID", typeof(int)) });
    int selectedFruitsCount = 1;
    foreach (ListItem item in ddlFruits.Items)
    {
        if (item.Selected)
        {
            FruitTable.Rows.Add(selectedFruitsCount, item.Value);
            selectedFruitsCount++;
        }
    }
    // Write code to save into Database.
    gvFruits.DataSource = FruitTable;
    gvFruits.DataBind();
}

Screenshot