Show Hide Add Edit LinkButton for Authenticated user inside FormView using C# and VB.Net in ASP.Net

I want to make button Add not visible when the authenticated user is on the profile page then make the button Edit visible for the authenticated User.

protected void FormView1follow_ItemDataBound(object sender, DataListItemEventArgs e)
    {
        using (SqlConnection con = new SqlConnection(constring))
        {
            using (SqlCommand cmd = new SqlCommand("SELECT * FROM User3 where UserName='" + Request.QueryString["Id"].ToString() + "'  AND UserName='" + Session["userName"] + "' ", con))
            {
                con.Open();
                //cmd.Parameters.AddWithValue("@UserName", Request.QueryString["Id"].ToString());
                SqlDataReader idr = cmd.ExecuteReader();
                if (idr.Read())
                {

                    (e.Item.FindControl("btnEdit") as LinkButton).Visible = true;
                }
                else
                {
                    (e.Item.FindControl("btnAdd") as LinkButton).Visible = true;
                }
            }
        }
    }