private void ShowMessages()

in Office365APIEditor/UI/FolderViewerForm.cs [338:413]
63 lines of code
18 McCabe index (conditional complexity)

        private void ShowMessages(List<ViewerHelper.Data.MailAPI.Message> messages)
        {
            // Show all messages in List.

            try
            {
                foreach (var item in messages)
                {
                    // Add new row.
                    string rowReceivedDateTime = item.ReceivedDateTime ?? "";
                    string rowCreatedDateTime = item.CreatedDateTime ?? "";
                    string rowSentDateTime = item.SentDateTime ?? "";
                    string subject = item.Subject ?? "";
                    string sender = (item.Sender != null && item.Sender.EmailAddress != null && item.Sender.EmailAddress.Address != null) ? item.Sender.EmailAddress.Address : "";
                    string recipients = (item.ToRecipients != null) ? ConvertRecipientsListToString(item.ToRecipients) : "";
                    string isDraft = (item.IsDraft != null && item.IsDraft.HasValue) ? item.IsDraft.Value.ToString() : "";

                    if (DateTime.TryParse(rowReceivedDateTime, out DateTime receivedDateTime) == false)
                    {
                        receivedDateTime = DateTime.MinValue;
                    }

                    if (DateTime.TryParse(rowCreatedDateTime, out DateTime createdDateTime) == false)
                    {
                        createdDateTime = DateTime.MinValue;
                    }

                    if (DateTime.TryParse(rowSentDateTime, out DateTime sentDateTime) == false)
                    {
                        sentDateTime = DateTime.MinValue;
                    }

                    DataGridViewRow itemRow = new DataGridViewRow
                    {
                        Tag = item.Id
                    };
                    itemRow.CreateCells(dataGridView_ItemList, new object[] { subject, sender, recipients, receivedDateTime, createdDateTime, sentDateTime });

                    if (item.IsDraft != null && item.IsDraft.HasValue && item.IsDraft.Value == true)
                    {
                        // This item is draft.
                        itemRow.ContextMenuStrip = contextMenuStrip_ItemList_DraftItem;
                    }
                    else
                    {
                        // This item is not draft.
                        itemRow.ContextMenuStrip = contextMenuStrip_ItemList;
                    }

                    if (dataGridView_ItemList.InvokeRequired)
                    {
                        dataGridView_ItemList.Invoke(new MethodInvoker(delegate { dataGridView_ItemList.Rows.Add(itemRow); }));
                    }
                    else
                    {
                        dataGridView_ItemList.Rows.Add(itemRow);
                    }
                }
            }
            catch (InvalidOperationException ex)
            {
                if (isFormClosing)
                {
                    // It seems that this window was closed.
                    // Do nothing.
                }
                else
                {
                    MessageBox.Show(ex.Message, "Office365APIEditor");
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.GetType().FullName + "\r\n" + ex.Message, "Office365APIEditor");
            }
        }