Epicor_Integration.Bill_Master.Bill_Master C# (CSharp) Method

        public Bill_Master(List<BillItem>Bill , string ParentNumber, string Rev, decimal weight_val, decimal area_val)
        {
            try
            {
                InitializeComponent();
            }
            catch (Exception ex) { MessageBox.Show(ex.Message); }

            try
            {
                weight.Value = weight_val;

                area.Value = area_val;
            }
            catch { }

            BillDataGrid.AutoGenerateColumns = false;

            gid_txt.Text = Properties.Settings.Default.ecogroup;

            if (Rev == "")
                parentrev_txt.Text = DataList.GetCurrentRev(ParentNumber);
            else
                parentrev_txt.Text = Rev;

            partnum_txt.Leave += partnum_txt_Leave;

            mtlseq_txt.Text = GetNextSeq().ToString();

            parent_txt.Text = ParentNumber;

            try
            {
                EngWBDS = EngWB.GetDatasetForTree(gid_txt.Text, parent_txt.Text, parentrev_txt.Text, "", null, false, false);

                BillDataGrid.DataSource = EngWBDS.Tables["ECOMtl"];
            }
            catch
            {
                try
                {
                    MessageBox.Show("You must check part out before continuing.", "Warning!", MessageBoxButtons.OK, MessageBoxIcon.Hand);

                    CheckOut_Master CO_M = new CheckOut_Master(parent_txt.Text);

                    DialogResult dr = CO_M.ShowDialog();

                    if (dr != DialogResult.Cancel)
                    {
                        EngWBDS = EngWB.GetDatasetForTree(gid_txt.Text, parent_txt.Text, parentrev_txt.Text, "", null, false, false);

                        BillDataGrid.DataSource = EngWBDS.Tables["ECOMtl"];
                    }
                    else
                        this.Close();
                }
                catch (Exception ex1) {MessageBox .Show (ex1.Message + "\n\nThis process will now close","Error!",MessageBoxButtons.OK,MessageBoxIcon.Error); }
            }

            this.FormClosing += Bill_Master_FormClosing;

            BW.RunWorkerAsync(Bill);

            try
            {
                BWForm.ShowDialog();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message,"Bill Master Error!",MessageBoxButtons.OK,MessageBoxIcon.Error);

                BWForm.Dispose();

                BWForm = new Waiting("Loading Bill of Materials into Epicor...");

                BWForm.ShowDialog();
            }
        }