Not able to call method

Question

when i debug, from       gridviewbind();
                               deleteCart(pic); 

it stops,and it is not entering into public void deleteCart(string orderID), what could be a problem?



protected void Page_Load(object sender, EventArgs e)
    {
        if (!Page.IsPostBack)
        {
            gridviewbind();
        }
    }
    public void gridviewbind()
    {
        SqlConnection con = new SqlConnection("constring1");
        string str = "select * from Products INNER JOIN orders on Products.picID=orders.productID";
        SqlCommand cmd = new SqlCommand(str, con);
        con.Open();
        DataTable dt = new DataTable();
        dt.Columns.Add(new DataColumn("picID", typeof(int)));
        dt.Columns.Add(new DataColumn("title", typeof(string)));
        dt.Columns.Add(new DataColumn("price", typeof(int)));
        dt.Columns.Add(new DataColumn("dateAdded", typeof(DateTime)));
        dt.Columns.Add(new DataColumn("picURL", typeof(string)));
        SqlDataReader reader = cmd.ExecuteReader();
        while (reader.Read())
        {
            DataRow dr = dt.NewRow();
            dr["picID"] = Convert.ToInt32(reader["picID"]);
            dr["title"] = reader["title"];
            dr["price"] = Convert.ToInt32(reader["price"]);
            dr["dateAdded"] = reader["dateAdded"];
            dr["picURL"] = ResolveUrl("~/images/" + reader["picURL"]);
            dt.Rows.Add(dr);
        }
        reader.Close();
        con.Close();
        GridView1.DataSource = dt;
        GridView1.DataBind();
    }
    protected void Gridview1_RowCommand(object sender, GridViewCommandEventArgs e)
    {

        if (e.CommandName == "removeRow")
        {
            string pic = Convert.ToString(e.CommandArgument);
            //  GridViewRow row = GridView1.Rows[pic];

            //     deleteCart(row.Cells[1].Text.ToString());
            gridviewbind();
            deleteCart(pic);

        }

    }

    public void deleteCart(string orderID)
    {
        using (SqlConnection con = new SqlConnection("constring1"))
        {
            using (SqlCommand cmd = new SqlCommand())
            {
                cmd.CommandText = "delete from orders where orderID=@orderID";
                cmd.Connection = con;
                cmd.CommandType = CommandType.Text;

                cmd.Parameters.AddWithValue("@orderID", orderID);
                con.Open();
                var temp = cmd.ExecuteNonQuery();
                con.Close();
            }
        }
    }