Show updateprogress control for particular row when click on button in GridView in ASP.Net

This is my html code:

<asp:GridView ID="GridView1" runat="server" AllowPaging="True" CssClass="col-sm-12" AutoGenerateColumns="False" PageSize="8" CellPadding="3" GridLines="Horizontal" OnPageIndexChanging="GridView1_PageIndexChanging" OnRowCommand="GridView1_RowCommand" BackColor="White" BorderColor="#E7E7FF" BorderStyle="None" BorderWidth="1px">
                                            <AlternatingRowStyle BackColor="#F7F7F7" />
                                            <Columns>
                                                <asp:TemplateField HeaderStyle-CssClass="maingrdhed" HeaderText="Head1">
                                                    <ItemTemplate>
                                                        <div class="col-sm-offset-1 grdmsg">
                                                            <asp:Label ID="1lbl" runat="server" CssClass="control-label" Text='<%# Eval("Info") %>'></asp:Label>
                                                        </div>

                                                        <div class="form-group col-sm-offset-6 grdunclr">
                                                            <asp:Label ID="2lbl" runat="server" CssClass="control-label" Text='<%# Eval("Name") %>'></asp:Label><br />
                                                            <asp:Label ID="3lbl" runat="server" CssClass="control-label" Text='<%# Eval("Date") %>'></asp:Label>
                                                        </div>

                                                        <div class="col-sm-offset-1">
                                                            <asp:Label ID="info" runat="server" CssClass="control-label" Text="labelcontrol"></asp:Label>
                                                        </div>
                                                        <asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional">
                                                            <ContentTemplate>
                                                                <div class="row">
                                                                    <div class="col-sm-offset-1 col-sm-8 form-group">
                                                                        <asp:Label ID="4lbl" runat="server" CssClass="control-label" Text="data:" ></asp:Label>
                                                                        <asp:TextBox ID="1txt" runat="server" CssClass="form-control txtbdrclr" TextMode="MultiLine" Rows="2" ></asp:TextBox>
                                                                    </div>
                                                                </div>
                                                                <div class="row">
                                                                    <div class="col-sm-offset-1 col-sm-11 form-group">
                                                                        <asp:Button ID="Button1" runat="server" CssClass="btn btnbtn btn-success" Text="Post" CommandName="cmdpost" />
                                                                    </div>
                                                                </div>
                                                                <div class="col-sm-offset-4 col-sm-8">
                                                                  <asp:UpdateProgress ID="UpdateProgress1" runat="server" AssociatedUpdatePanelID="GridView1" DynamicLayout="true">
                                                                   <ProgressTemplate>
                                                                   <div class="img-responsive">
                                                                    <img src="Images/ajax-loader (2).gif" />
                                                                     Loading..
                                                                   </div>
                                                                   </ProgressTemplate>
                                                                  </asp:UpdateProgress>
                                                                 </div>
                                                            </ContentTemplate>
                                                        </asp:UpdatePanel>

                                                    </ItemTemplate>
                                                </asp:TemplateField>
                                            </Columns>                                            
                                            
                                        </asp:GridView>
                                    </ContentTemplate>

This is my cs code:

protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
        {
            if (e.CommandName == "cmdpost")
            {
                System.Threading.Thread.Sleep(2000);

            }
        }