how to get hiddenfield id on codebehind in a repeater control using asp.net

See more:

C#

ASP.NET

Hi,

how to get hiddenfield id on codebehind in a repeater control using asp.net.
here is my code:

<asp:Repeater ID="Repeater1" runat="server">
                <ItemTemplate>
                    <div class="item thumbnail">
                        <div class="art-im">


                            <a href="/Articles.aspx?Id=<%# Eval("Id")%>">
                                <asp:Image runat="server" Width="240px" Height="135px" ID="smr" ImageUrl='<%#Picture(Eval("PicturePathId"))%>' /></a></div>
                        <div class="art-cont">
                            <div class="art-head-part">
                                <a class="art-cate" href="/Articles.aspx?Id=<%# Eval("Id")%>">
                                    <%# Eval("Domain") %></a>
                                <h3 class="art-tit">
                                    <a href="/Articles.aspx?Id=<%# Eval("Id")%>">
                                        <%# Eval("Title").ToString().Substring(0, Math.Min(45, Eval("Title").ToString().Length)) + "...."%></a>
                                </h3>
                            </div>
                            <div class="art-foot-part">
                            <asp:LinkButton ID="linkShare" runat="server" OnClick="AdminEdit_OnClick" >Share</asp:LinkButton>
                                <asp:HiddenField ID="blogid" runat="server" Value='<%# Eval("Id")%>' />

                                <a id="imgshare" href="#?w=500" class="poplight1" rel="popupSharev"><span><b>1.3K</b>
                                    SHARES</span> </a>
                            </div>
                        </div>
                    </div>
                </ItemTemplate>
                <AlternatingItemTemplate>
                    <div class="item large">
                        <div class="art-im">
                            <a href="/Articles.aspx?Id=<%# Eval("Id")%>">
                                <asp:Image runat="server" Height="300px" Width="450px" ID="smr" ImageUrl='<%#Picture(Eval("PicturePathId"))%>' /></a></div>
                        <div class="art-cont">
                            <div class="art-head-part big-cont">
                                <a class="art-cate" href="/Articles.aspx?Id=<%# Eval("Id")%>"><%# Eval("Domain") %></a>
                                <h3 class="art-tit">
                                    <a href="/Articles.aspx?Id=<%# Eval("Id")%>">
                                        <%# Eval("Title") %></a>
                                </h3>
                                <p class="art-p">
                                    <%# Eval("Description").ToString().Substring(0, Math.Min(250, Eval("Description").ToString().Length)) + "...."%>
                                </p>
                            </div>
                            <div class="art-foot-part">
                                <asp:LinkButton ID="linkShare" runat="server" OnClick="AdminEdit_OnClick" >Share</asp:LinkButton>
                                <asp:HiddenField ID="blogid" runat="server" Value='<%# Eval("Id")%>' />

                                <a id="imgshare" href="#?w=500" class="poplight1" rel="popupSharev"><span><b>1.3K</b>
                                    SHARES</span> </a>
                            </div>
                        </div>
                    </div>
                </AlternatingItemTemplate>
            </asp:Repeater>

protected void AdminEdit_OnClick(object sender, EventArgs e)
        {

            HiddenField hf = (HiddenField)Repeater1.FindControl("blogid");
            Response.Write("Blogid" + hf);
        }

I got null value.
Please help me..
Thank you.......