//******************************************************************************************************//  ErrorLogUserControl.xaml.cs - Gbtc////  Copyright © 2010, Grid Protection Alliance.  All Rights Reserved.////  Licensed to the Grid Protection Alliance (GPA) under one or more contributor license agreements. See//  the NOTICE file distributed with this work for additional information regarding copyright ownership.//  The GPA licenses this file to you under the MIT License (MIT), the "License"; you may//  not use this file except in compliance with the License. You may obtain a copy of the License at:////      http://www.opensource.org/licenses/MIT////  Unless agreed to in writing, the subject software distributed under the License is distributed on an//  "AS-IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. Refer to the//  License for the specific language governing permissions and limitations.////  Code Modification History://  ----------------------------------------------------------------------------------------------------//  03/27/2012 - prasanthgs//       Generated original version of source code.//  04/12/2012 - prasanthgs//       Reworked as per the comments of codeplex reviewers.//       Code Optimized.//  09/10/2012 - Aniket Salver//       Added paging technique and implemented sorting.////****************************************************************************************************** using System;using System.ComponentModel;using System.Linq;using System.Windows.Controls;using GSF.TimeSeries.UI.ViewModels; namespace GSF.TimeSeries.UI.UserControls{    /// <summary>    /// Interaction logic for ErrorLogUserControl.xaml    /// </summary>    public partial class ErrorLogUserControl : UserControl    {        #region [ Members ]         private readonly ErrorLogViewModel m_dataContext;        private DataGridColumn m_sortColumn;        private string m_sortMemberPath;        private ListSortDirection m_sortDirection;         #endregion         #region [ Constructor ]         /// <summary>        /// Constructor for Error user control class.        /// Creates data source with page size 18.        /// </summary>        public ErrorLogUserControl()        {            InitializeComponent();            m_dataContext = new ErrorLogViewModel(18);            m_dataContext.PropertyChanged += ViewModel_PropertyChanged;            this.DataContext = m_dataContext;             m_sortColumn = DataGridList.Columns.Single(column => (string)column.Header == "Sl No.");            m_sortMemberPath = "ID";            m_sortDirection = ListSortDirection.Descending;            m_dataContext.SortData(m_sortMemberPath, m_sortDirection);        }         #endregion         #region [ Methods ]         private void DataGrid_Sorting(object sender, DataGridSortingEventArgs e)        {            if (e.Column.SortMemberPath != m_sortMemberPath)                m_sortDirection = ListSortDirection.Ascending;            else if (m_sortDirection == ListSortDirection.Ascending)                m_sortDirection = ListSortDirection.Descending;            else                m_sortDirection = ListSortDirection.Ascending;             m_sortColumn = e.Column;            m_sortMemberPath = e.Column.SortMemberPath;            m_dataContext.SortData(m_sortMemberPath, m_sortDirection);        }         private void ViewModel_PropertyChanged(object sender, PropertyChangedEventArgs e)        {            if (e.PropertyName == "ItemsSource")                Dispatcher.BeginInvoke(new Action(SortDataGrid));        }         private void SortDataGrid()        {            if ((object)m_sortColumn != null)            {                m_sortColumn.SortDirection = m_sortDirection;                DataGridList.Items.SortDescriptions.Clear();                DataGridList.Items.SortDescriptions.Add(new SortDescription(m_sortMemberPath, m_sortDirection));                DataGridList.Items.Refresh();            }        }         #endregion    }}