如何在listview中获取itemtemplate内的控件

    如下，我在listview的每项内定义了一个button,现在我想在别人点击该button后我能获取他所点的这项中PriceLabel上的值，
但是不知道如何去获得，谢谢大家回答       <LayoutTemplate>
                <ul  class="itemContainer">
                    <li ID="itemPlaceholder" runat="server" />
                    </ul>
                    <div style="">
                        <asp:DataPager ID="DataPager" runat="server">
                            <Fields>
                                <asp:NextPreviousPagerField ButtonType="Button" ShowFirstPageButton="True" 
                                    ShowLastPageButton="True" />
                            </Fields>
                        </asp:DataPager>
                    </div>
                </LayoutTemplate>                <ItemTemplate>
                    <li style="">
                        id:
                        <asp:Image ID="Image1" runat="server" ImageUrl='<%# Eval("img") %> '/>
                   <br />
                        name:
                    <asp:Label ID="nameLabel" runat="server" Text='<%# Eval("name") %>' />
                    <br />
                        price:
                    <asp:Label ID="priceLabel" runat="server" Text='<%# Eval("price") %>' />
                    <br />
                        intro:
                    <asp:Label ID="introLabel" runat="server" Text='<%# Eval("intro") %>' />
                        <br />
                    <asp:Button ID="Button1" runat="server" Text="选择" onclick="Button1_Click" />
                        <br />
                    </li>
                </ItemTemplate>