if ((e.NewStatus == UserAccountStatus.Logoff) || (e.NewStatus == UserAccountStatus.Disconnected))
            {
                base.Close();
            }
        }

        private void DeleteAllContacstHistory()
        {
            try
            {
                if (this._framework.MessageHistoryManager.ClearMessageHistory(this))
                {
                    this.lblMessageInfo.Text = "";
                    this.rtfContent.Text = "";
                }
            }
            catch (Exception exception)
            {
                ClientLogger.WriteException(exception);
            }
        }

        private void DeleteContactAllHistory(Imps.Client.Core.Contact contact)
        {
            try
            {
                if (this._framework.UnifiedMessageBox.ShowConfirmation(this, string.Format(StringTable.Conversation.MsgConfirmDeleteContact, contact.DisplayName)) == DialogResult.Yes)
                {
                    this._framework.MessageHistoryManager.AsyncDeleteMessageHistory(new string[] { contact.Uri.Raw });
                    this.BindGridView(contact);
                    this.lblMessageInfo.Text = "";
                    this.rtfContent.Text = "";
                }
            }
            catch (Exception exception)
            {
                ClientLogger.WriteException(exception);
            }
        }

        private void DeleteGroupsAllContactsHistory(Imps.Client.Core.ContactGroup group)
        {
            try
            {
                if (this._framework.UnifiedMessageBox.ShowConfirmation(this, string.Format(StringTable.Conversation.MsgConfirmDeleteGroup, group.Name)) == DialogResult.Yes)
                {
                    string[] contactUris = new string[group.Contacts.Count];
                    int index = 0;
                    foreach (Imps.Client.Core.Contact contact in group.Contacts)
                    {
                        contactUris[index] = contact.Uri.Raw;
                        index++;
                    }
                    this._framework.MessageHistoryManager.AsyncDeleteMessageHistory(contactUris);
                    this.lblMessageInfo.Text = "";
                    this.rtfContent.Text = "";
                }
            }
            catch (Exception exception)
            {
                ClientLogger.WriteException(exception);
            }
        }

        private void DeleteSelectedItems()
        {
            try
            {
                if ((this.gdHistory.SelectedRows.Count != 0) && (this._framework.UnifiedMessageBox.ShowConfirmation(this, StringTable.Conversation.MsgConfirmDelete) == DialogResult.Yes))
                {
                    this.lblMessageInfo.Text = "";
                    this.rtfContent.Text = "";
                    MessageList tag = this.gdHistory.Tag as MessageList;
                    Dictionary<Imps.Client.Core.Contact, List<string>> dictionary = new Dictionary<Imps.Client.Core.Contact, List<string>>();
                    foreach (DataGridViewRow row in this.gdHistory.SelectedRows)
                    {
                        Imps.Client.Pc.Message dataBoundItem = row.DataBoundItem as Imps.Client.Pc.Message;
                        if (!dictionary.ContainsKey(dataBoundItem.OwnerContact))
                        {
                            List<string> list2 = new List<string>();
                            dictionary.Add(dataBoundItem.OwnerContact, list2);
                        }
                        dictionary[dataBoundItem.OwnerContact].Add(dataBoundItem.MessageId);
                    }
                    foreach (Imps.Client.Core.Contact contact in dictionary.Keys)
                    {
                        tag.DeleteMessages(contact, dictionary[contact]);
                    }
                }
            }
            catch (Exception exception)
            {
                ClientLogger.WriteException(exception);
            }
        }

        private void dgMenu_Opening(object sender, CancelEventArgs e)
        {
            this.gdHistory.Focus();
            this.dgMenuCopy.Enabled = this.gdHistory.SelectedRows.Count > 0;
            this.dgMenuDelete.Enabled = this.gdHistory.SelectedRows.Count > 0;
            this.dgMenuSelectAll.Enabled = this.gdHistory.Rows.Count > 0;
        }

        private void dgMenuCopy_Click(object sender, EventArgs e)
        {
            this.DoCopy();
        }

        private void dgMenuDelete_Click(object sender, EventArgs e)
        {
            this.DeleteSelectedItems();
        }

        private void dgMenuSelectAll_Click(object sender, EventArgs e)
        {
            this.gdHistory.Focus();
            SendKeys.Send("^a");
        }

        protected override void Dispose(bool disposing)
        {
            if (disposing && (this.components != null))
            {
                this.components.Dispose();
            }
            base.Dispose(disposing);
        }

        private void DoCopy()
        {
            DataObject clipboardContent = this.gdHistory.GetClipboardContent();
            DataObject data = new DataObject();
            data.SetText(clipboardContent.GetText(TextDataFormat.Text), TextDataFormat.Text);
            data.SetText(clipboardContent.GetText(TextDataFormat.UnicodeText), TextDataFormat.UnicodeText);
            data.SetText(clipboardContent.GetText(TextDataFormat.CommaSeparatedValue), TextDataFormat.CommaSeparatedValue);
            Clipboard.SetDataObject(data);
        }

        private void FormatNavigateInfo(MessageList messages)
        {
            try
            {
                this.bindingNavigator.SuspendLayout();
                this.btnDeleteAll.Enabled = true;
                this.bindingNavigatorDeleteItem.Enabled = true;
                if ((messages == null) || (messages.Count == 0))
                {
                    this.bindingNavigatorMoveFirstItem.Enabled = false;
                    this.bindingNavigatorMovePreviousItem.Enabled = false;
                    this.bindingNavigatorMoveLastItem.Enabled = false;
                    this.bindingNavigatorMoveNextItem.Enabled = false;
                    this.bindingNavigatorDeleteItem.Enabled = false;
                    this.btnDeleteAll.Enabled = false;
                }
                else if (messages.PageCount == 1)
                {
                    this.bindingNavigatorMoveFirstItem.Enabled = false;
                    this.bindingNavigatorMovePreviousItem.Enabled = false;
                    this.bindingNavigatorMoveLastItem.Enabled = false;
                    this.bindingNavigatorMoveNextItem.Enabled = false;
                }
                else
                {
                    this.bindingNavigatorMoveFirstItem.Enabled = messages.CurrentPage > 1;
                    this.bindingNavigatorMovePreviousItem.Enabled = messages.CurrentPage > 1;
                    this.bindingNavigatorMoveLastItem.Enabled = messages.CurrentPage < messages.PageCount;
                    this.bindingNavigatorMoveNextItem.Enabled = messages.CurrentPage < messages.PageCount;
                }
                this.bindingNavigator.ResumeLayout();
                this.lblNavigatePageInfo.Text = string.Format(StringTable.Conversation.MsgNavigaePager, messages.CurrentPage, messages.PageCount);
            }
            catch (Exception exception)
            {
                ClientLogger.WriteException(exception);
            }
        }

        private void gdHistory_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
        {
            if (this.gdHistory.Columns[e.ColumnIndex].Name == this.contentDataGridViewTextBoxColumn.Name)
            {
                e.Value = Imps.Utils.TagParser.TagParser.Create(e.Value.ToString(), true).Text;
                Imps.Client.Pc.Message dataBoundItem = this.gdHistory.Rows[e.RowIndex].DataBoundItem as Imps.Client.Pc.Message;
                if (dataBoundItem.FromUri == this.CurrentUser.Uri.Raw)
                {
                    this.gdHistory.Rows[e.RowIndex].DefaultCellStyle.BackColor = Color.FromArgb(0xf1, 240, 0xf8);
                }
            }
        }

        private void gdHistory_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Delete)
            {
                this.DeleteSelectedItems();
            }
            if (e.Control && (e.KeyCode == Keys.C))
            {
                this.DoCopy();
                e.Handled = true;
            }
        }

        private void gdHistory_RowEnter(object sender, DataGridViewCellEventArgs e)
        {
            try
            {
                this.rtfContent.Clear();
                Imps.Client.Pc.Message dataBoundItem = this.gdHistory.Rows[e.RowIndex].DataBoundItem as Imps.Client.Pc.Message;
                string from = dataBoundItem.From;
                string to = dataBoundItem.To;
                if (from.Length > 20)
                {
                    from = from.Substring(0, 20) + "...";
                }
                if (to.Length > 50)
                {
                    to = to.Substring(0, 50) + "...";
                }
                this.lblMessageInfo.Text = string.Format(StringTable.Conversation.MsgMessageInfo, new object[] { dataBoundItem.Date, dataBoundItem.Time, from, to });
                Thread.Sleep(50);
                this._rtfManager.AppentString(dataBoundItem.Content);
            }
            catch (Exception exception)
            {
                ClientLogger.WriteException(exception);
            }
        }

        private void InitializeComponent()
        {
            this.components = new Container();
            TreeNode node = new TreeNode("聯系人");
            ComponentResourceManager manager = new ComponentResourceManager(typeof(MessageHistoryForm));
            this.xSplitContainer1 = new XSplitContainer();
            this.treeNavigate = new TreeView();
            this.imageList = new ImageList(this.components);
            this.xSplitContainer2 = new XSplitContainer();
            this.gdHistory = new DataGridView();
            this.fromDataGridViewTextBoxColumn = new DataGridViewTextBoxColumn();
            this.dateDataGridViewTextBoxColumn = new DataGridViewTextBoxColumn();
            this.timeDataGridViewTextBoxColumn = new DataGridViewTextBoxColumn();
            this.To = new DataGridViewTextBoxColumn();
            this.contentDataGridViewTextBoxColumn = new DataGridViewTextBoxColumn();
            this.dgMenu = new menu_widget(this.components);
            this.dgMenuSelectAll = new ToolStripMenuItem();
            this.dgMenuCopy = new ToolStripMenuItem();
            this.dgMenuDelete = new ToolStripMenuItem();
            this.sourceMessages = new BindingSource(this.components);
            this.panel2 = new Panel();
            this.rtfContent = new ChatRichTextBox();
            this.lblMessageInfo = new XLabel();
            this.panel1 = new Panel();
            this.bindingNavigator = new BindingNavigator(this.components);
            this.bindingNavigatorMoveFirstItem = new ToolStripButton();
            this.bindingNavigatorSeparator = new ToolStripSeparator();