<script type="text/javascript">

    function UpdateWindowStatus() {

        window.status = grid.cpRowCount;

    }

    function OnUpdateButtonClick(s, e) {

        grid.PerformCallback();

    }

    function OnGridViewEndCallback(s, e) {

        UpdateWindowStatus();

    }

</script>

<dxwgv:ASPxGridView ID="gvGridView" runat="server" AutoGenerateColumns="False" DataSourceID="dsDataSource" KeyFieldName="CategoryID"

    ClientInstanceName="grid" OnCustomJSProperties="OnCustomJSPropertiesAssign">

    <Columns>

        <dxwgv:GridViewDataTextColumn FieldName="CategoryID" ReadOnly="True" VisibleIndex="0">

            <EditFormSettings Visible="False" />

        </dxwgv:GridViewDataTextColumn>

        <dxwgv:GridViewDataTextColumn FieldName="CategoryName" VisibleIndex="1" />

        <dxwgv:GridViewDataTextColumn FieldName="Description" VisibleIndex="2" />

    </Columns>

    <ClientSideEvents EndCallback="OnGridViewEndCallback" />

</dxwgv:ASPxGridView>

<br />

<table>

    <tr>

        <td>

            Filter by Category Name:

        </td>

        <td>

            <dxe:ASPxTextBox ID="txtFilterBox" runat="server" Width="170px" />

        </td>

        <td>

            <dxe:ASPxButton ID="btnUpdate" runat="server" Text="Update">

                <ClientSideEvents Click="OnUpdateButtonClick" />

            </dxe:ASPxButton>

        </td>

    </tr>

</table>

<asp:AccessDataSource ID="dsDataSource" runat="server" DataFile="~/App_Data/nwind.mdb"

    SelectCommand="SELECT * FROM [Categories] WHERE ([CategoryName] LIKE '%' + ? + '%')">

    <SelectParameters>

        <asp:ControlParameter ControlID="txtFilterBox" Name="CategoryName" PropertyName="Text" Type="String" />

    </SelectParameters>

</asp:AccessDataSource>

protected void Page_Load(object sender, EventArgs e) {

    // TODO: default binding

}

protected void OnCustomJSPropertiesAssign(object sender, ASPxGridViewClientJSPropertiesEventArgs e) {

    ASPxGridView grid = (ASPxGridView)sender;

    e.Properties["cpRowCount"] = grid.VisibleRowCount;

}