dropdownlist item to get highlighted in gridview

<asp:GridView ID="gvEmployees" runat="server" AutoGenerateColumns="False" CellPadding="4" ForeColor="#333333" GridLines="None" DataSourceID="objGroups" OnRowCommand="gdvGroups_RowCommand" Width="60%" meta:resourcekey="gdvGroupsResource1">
    <FooterStyle BackColor="#1C5E55" Font-Bold="True" ForeColor="White" />
    <RowStyle BackColor="#E3EAEB" />
    <Columns>
        <asp:BoundField HeaderText="Employee ID" />
        <asp:BoundField HeaderText="Employee Name" />
    </Columns>
    <PagerStyle BackColor="#666666" ForeColor="White" HorizontalAlign="Center" />
    <SelectedRowStyle BackColor="#C5BBAF" Font-Bold="True" ForeColor="#333333" />
    <HeaderStyle BackColor="#1C5E55" Font-Bold="True" ForeColor="White" />
    <EditRowStyle BackColor="#7C6F57" />
    <AlternatingRowStyle BackColor="White" />
</asp:GridView>

protected void ddl_SelectedIndexChanged(object sender, EventArgs e)
{
    gvEmployees.DataBind();//return rows colors to normal
    foreach (GridViewRow row in gvEmployees.Rows)
    {
        if (row.Cells[1].Text == ddl.SelectedItem.Text)
        {
            row.BackColor = System.Drawing.Color.Blue;
        }
    }
}