how to get image id when clicked on image?

Question

    i want to change profile picture based on selected image for this i used session for storing all image's id but when i run application it returns me first id only

    how to get required id can anybody know how to do this

    below is my source code:

       

        <div id="Container">

        <div style="float: left; width: 50%">

        <table>

        <tr>

        <td>

        <asp:ListView ID="lvPhotoViewer" runat="server" GroupItemCount="1"    OnItemDataBound="lvPhotoViewer_ItemDataBound" onitemcommand="lvPhotoViewer_ItemCommand"  >

        <LayoutTemplate>

        <table id="groupPlaceholderContainer" runat="server">

        <tr id="groupPlaceholder" runat="server">

        </tr>

        </table>

        </LayoutTemplate>

        <ItemTemplate>

        <td id="Td4" align="center" style="background-color: #eeeeee;">

        <asp:ImageButton runat="server" ID="imPhoto" Height="450px" Width="450px" AlternateText="Imageg not found"/>

        </td>

        </ItemTemplate>

        <GroupTemplate>

        <tr id="itemPlaceholderContainer" runat="server">

        <td id="itemPlaceholder" runat="server">

        </td>

        </tr>

        </GroupTemplate>

        </asp:ListView>

        </td>

        </tr>

        <tr>

        <td align="center">

        <asp:DataPager ID="DataPager1" runat="server" PagedControlID="lvPhotoViewer" PageSize="1" OnPreRender="DataPager1_PreRender">

        <Fields>

        <asp:NextPreviousPagerField ButtonType="Link" PreviousPageText="Previous" NextPageText=" Next" />

        </Fields>

        </asp:DataPager>

        </td>

        </tr>

        </table>

        </div>

        <div style="float: right; width: 37%">

        <asp:Repeater runat="server" ID="RepComment" onitemdatabound="RepComment_ItemDataBound" 

    onitemcommand="RepComment_ItemCommand"  >

        <HeaderTemplate>

        <table>

        </HeaderTemplate>

        <ItemTemplate>

        <tr>

        <td>

        <asp:Image runat="server" ID="Image1" CssClass="small_img" />

        </td>

        <td>

        <%# Eval("FirstName") %>&nbsp;<%# Eval("LastName") %></td>

        </tr>

        <tr>

        <td>

        <asp:LinkButton ID="lnkbtnSetPic" runat="server" CssClass="Link" Text="Set as profile picture" CommandName="SetasProfilePic"></asp:LinkButton>

        </td>

        </tr>

        <tr>

        <td>

        <asp:Button ID="btnLike" runat="server" Text="Like" CommandName="Like" CssClass="button" />

        <asp:Button ID="btnComment" runat="server" Text="Comment" CommandName="Comment" CssClass="button" />

        <asp:Button ID="btnShare" runat="server" Text="Share" CommandName="Share" CssClass="button" />

        <asp:Label ID="lblPostDate" runat="server"></asp:Label>

        </td>

        </tr>

        </ItemTemplate>

        <FooterTemplate>

        </table>

        </FooterTemplate>

        </asp:Repeater>

        </div>

        </div>

    

    

    code behind is:

    

    

        public partial class ViewAlbum : System.Web.UI.Page

        {

        Images objImages = new Images();

        DataSet ds1;

        int RegId,PicId;

        protected void Page_Load(object sender, EventArgs e)

        {

        RegId = (Int32)Session["RegId"];

        ds1 = objImages.GetAlbum(RegId);

        lvPhotoViewer.DataSource = ds1;

        lvPhotoViewer.DataBind();

        AdminLogin objAdminLogin = new AdminLogin();

        RepComment.DataSource = ds.Tables[0];

        RepComment.DataBind();

        }

    

        protected void DataPager1_PreRender(object sender, EventArgs e)

        {

        lvPhotoViewer.DataSource = objImages.GetAlbum((Int32)Session["RegId"]);

        lvPhotoViewer.DataBind();

        }

    

        protected void lvPhotoViewer_ItemDataBound(object sender, ListViewItemEventArgs e)

        {

          

        if (e.Item.ItemType == ListViewItemType.DataItem)

        {

        if (e.Item.FindControl("imPhoto") != null)

        {

        string imageurl = "Images/user1.png";

        ListViewDataItem item = (ListViewDataItem)e.Item;

        imageurl = (string)DataBinder.Eval(item.DataItem, "ImageName");

        if (item.DataItem != null)

        {

        imageurl = "Pictures/" + (string)DataBinder.Eval(e.Item.DataItem, "ImageName");

        }

        ((Image)e.Item.FindControl("imPhoto")).ImageUrl = imageurl;

        }

        }

            

        }

    

        protected void RepComment_ItemDataBound(object sender, RepeaterItemEventArgs e)

        {

        if (e.Item.ItemType == ListViewItemType.DataItem)

        if(e.Item.ItemType== ListItemType.Item||e.Item.ItemType==ListItemType.AlternatingItem)

        {

        if (e.Item.FindControl("Image1") != null)

        {

        string imageurl = "Images/user1.png";

        imageurl = "Pictures/" + (string)DataBinder.Eval(e.Item.DataItem, "ImageName");

        ((Image)e.Item.FindControl("Image1")).ImageUrl = imageurl;

        }

        }

        }

    

        protected void RepComment_ItemCommand(object source, RepeaterCommandEventArgs e)

        {

        if (e.CommandName == "SetasProfilePic")

        {

        int picId =(Int32) Session["PicId"];

        Images objImages = new Images();

        objImages.SetProfilePic(RegId, picId);

        }

        }

    

        protected void lvPhotoViewer_ItemCommand(object sender, ListViewCommandEventArgs e)

        {

        if (e.CommandName == "Image")

        {

        Images objImage = new Images();

        Object getPicId = objImage.GetPicId(RegId);

        Session["PicId"] = getPicId;

        }

        }

        }