how to use update pannel in gridview control

dear all,

 how can i use update pannel in gridview control . below is my code

<td colspan="2" align="center"><asp:GridView runat="server" ID="grd1" AutoGenerateColumns="false" OnRowCommand="Gird1_RowCommand"><Columns><asp:TemplateField HeaderText="country id"><ItemTemplate><asp:Label runat="server" ID="lblid" Text='<%#Eval("COUNTRYID") %>'></asp:Label></ItemTemplate></asp:TemplateField><asp:TemplateField HeaderText="Country Name"><ItemTemplate><asp:Label runat="server" ID="lblcountry" Text='<%#Eval("COUNTRY_NAME") %>'></asp:Label></ItemTemplate></asp:TemplateField><asp:TemplateField HeaderText="F Name"><ItemTemplate><asp:Label ID="fname" runat="server" Text='<%#Eval("FNAME") %>'></asp:Label></ItemTemplate></asp:TemplateField><asp:TemplateField HeaderText="L Name"><ItemTemplate><asp:Label ID="Lname" runat="server" Text='<%#Eval("LNAME") %>'></asp:Label></ItemTemplate></asp:TemplateField><asp:TemplateField HeaderText="Select"><ItemTemplate><asp:LinkButton runat="server" CommandArgument='<%#Eval("REGID") %>' Text="select me"
                                        CommandName="select"></asp:LinkButton></ItemTemplate></asp:TemplateField></Columns></asp:GridView></td>

public  void Gird1_RowCommand(object sender, GridViewCommandEventArgs e)
    {

        if (e.CommandName == "select")
        {
            GridViewRow gr = (GridViewRow)(((LinkButton)e.CommandSource).NamingContainer);
            Label l = (Label)gr.FindControl("lblcountry");
            Label FNAME=(Label)gr.FindControl("FNAME");
            Label LNAME = (Label)gr.FindControl("LNAME");
            txtFname.Text = FNAME.Text; txtLname.Text = LNAME.Text;


        }
    }

now i want when i click on "select" button , without postback values should be filled inside controls... 

how can i use this?