Nanook.QueenBee.GenericQbItemEditor.GenericQbItemEditor_Load C# (CSharp) Method

        private void GenericQbItemEditor_Load(object sender, EventArgs e)
        {
            bool tooManyItems = false;
            int spacing = 22;
            int top = 20;
            int tabIndex = this.TabIndex;
            int lblWidth = 0;

            List<GenericQbItem> gis = QbFile.GetGenericItems(base.QbItem);

            if (gis.Count > 500)
            {
                tooManyItems = true;
                this.AutoScrollMinSize = new Size(0, (top * 2) + (spacing * (1 + 1) + 10)); //+ 1 for button
            }
            else
                this.AutoScrollMinSize = new Size(0, (top * 2) + (spacing * (gis.Count + 1) + 10)); //+ 1 for button

            this.Tag = base.QbItem; //store item for update

            bool hasEditable = false;

            try
            {
                int qbItemFound = 0;
                if (gis.Count > 0 && gis[gis.Count - 1].SourceProperty == "ItemQbKey") //nasty hack
                {
                    addEditItem(spacing, ref top, ref lblWidth, ref hasEditable, gis[gis.Count - 1]);
                    qbItemFound = 1;
                }

                if (!tooManyItems)
                {
                    for (int i = 0; i < gis.Count - qbItemFound; i++)
                        addEditItem(spacing, ref top, ref lblWidth, ref hasEditable, gis[i]);
                }
            }
            catch (Exception ex)
            {
                base.ShowException("Edit Item List Error", ex);
            }

            foreach (GenericQbEditItem et in this.Controls)
                et.TextBoxLeft = lblWidth + 6;

            try
            {
                if (this.Controls.Count != 0)
                {
                    Button btnUpdateItems = new Button();
                    btnUpdateItems.Text = "&Update";
                    btnUpdateItems.Anchor = AnchorStyles.Top | AnchorStyles.Right;
                    btnUpdateItems.Left = (this.ClientSize.Width - btnUpdateItems.Width - 15);
                    btnUpdateItems.Top = top + 10;
                    btnUpdateItems.Height = 22;
                    btnUpdateItems.Enabled = hasEditable;
                    btnUpdateItems.Click += new EventHandler(btnUpdateItems_Click);
                    this.Controls.Add(btnUpdateItems);
                }

                if (tooManyItems)
                    base.ShowError("Too Many Items", string.Format("This item contains {0} items. It is likely that it should be edited by a dedicated application.", gis.Count.ToString()));
            }
            catch (Exception ex)
            {
                base.ShowException("Update Button Error", ex);
            }
        }