jquery change ajax mvc 改变select选中项，<table>表中数据相应的变动

jquery 如何使用change 无刷新改变<table>表中的数据，动态链接数据库。
<%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<PagedList<CognisessDA.User>>" %>
<%@ Import Namespace="Webdiyer.WebControls.Mvc" %>
<select ID="ddlUser">
    <option Value="" Selected="True">All Users</option>
    <option Value="1">Enterprise Users</option>
    <option Value="0">Individual users</option>
</select>
<table>
        <tr>
            <th>
                Id
            </th>
            <th>
                User Name
            </th>
            <th>
                First Name
            </th>
            <th>
                Last Name
            </th>
            <th>
                Last Login
            </th>
            <th>
                Create Time
            </th>
            <th>
            </th>
        </tr>
        <% foreach (var item in Model)
           { %>
        <tr>
            <td>
                <%= Html.Encode(item.Id) %>
            </td>
            <td>
                <%= Html.Encode(item.Username) %>
            </td>
            <td>
                <%= Html.Encode(item.Firstname) %>
            </td>
            <td>
                <%= Html.Encode(item.Lastname) %>
            </td>
            <td>
                <%= Html.Encode(String.Format("{0:g}", item.LastLogin)) %>
            </td>
            <td>
                <%= Html.Encode(String.Format("{0:g}", item.CreateTime)) %>
            </td>
            <td align="center">
                <a href="/UserMaster/Edit/<%=item.Id %>">
                    <img src='../../Content/images/backstage_img5.gif' alt="Edit" /></a> <a href="/UserMaster/Details/<%=item.Id %>">
                        <img src='../../Content/images/backstage_img7.gif' alt="Details" /></a>
                <a href="/UserMaster/Delete/<%=item.Id %>">
                    <img src='../../Content/images/backstage_img4.gif' alt="Delete" onclick="return confirm('Are you sure to delete this record?');" /></a>
            </td>
        </tr>
        <% } %>
    </table>
<script type="text/javascript" language="javascript">
    $(document).ready(function() {
        $("ddlUser").change(function() {
            var orgId = $("ddlUser").val();
        });
    通过ddlUser的value值来控制table里的数据。
    //这里怎么写？
    });    
</script>各位大侠帮帮忙！