how to remove data that bind inside repeater in c#

how to remove repeater item

for example repeater show multiple item

describe item:

1. add one products that id is =2 and sizeid=01

second item product that id is same =2 but size id=02

when i will want to delete first product then it remove both products

because i will pass product id : likr this

CommandArgument='<%#Eval("ProductId") %>' CommandName="cmd_remove" />

i will want to pass sizeid but how please any body describe

my code is:

if (e.CommandName == "cmd_remove")

{

ObjAdmin.ProductId = int.Parse(e.CommandArgument.ToString());

ObjAdmin.SessionId = Session.SessionID;

ObjAdmin.size_id = int.parse(Session["lbl_sizeid"].ToString());

int val = ObjAdmin.Delete_MyCart();

CheckCart();

Response.Redirect("MyCart.aspx");

}

in this size id not get