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C# WPF Log4Net Viewer

, 15 Oct 2009 CPOL
Log4Net XML log viewer
LogViewer.zip
LogViewer
bin
Debug
LogViewer.exe
LogViewer.vshost.exe
LogViewer.vshost.exe.manifest
LogViewer.csproj.user
LogViewer.suo
Properties
Settings.settings
Resources
Images
arrow_left.png
arrow_right.png
find.png
Skins
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Data;
using System.IO;
using System.Xml;
using System.Drawing;
using System.Windows.Threading;
using System.ComponentModel;
using System.Windows.Interop;
using System.Reflection;


namespace LogViewer
{
    /// <summary>
    /// Interaction logic for Window1.xaml
    /// </summary>
    public partial class Window1 : Window
    {
        private string _FileName = string.Empty;
        private string FileName
        {
            get { return _FileName; }
            set
            {
                _FileName = value;
                RecentFileList.InsertFile(value);
            }
        }

        private List<LogEntry> _Entries = new List<LogEntry>();
        public List<LogEntry> Entries
        {
            get { return _Entries; }
            set { _Entries = value; }
        }

        public Window1()
        {
            InitializeComponent();
            listView1.AddHandler(GridViewColumnHeader.ClickEvent, new RoutedEventHandler(ListView1_HeaderClicked));
            RecentFileList.UseXmlPersister();
            RecentFileList.MenuClick += (s, e) => OpenFile(e.Filepath);

            imageError.Source = Imaging.CreateBitmapSourceFromHIcon(SystemIcons.Error.Handle, Int32Rect.Empty, null);
            imageInfo.Source = Imaging.CreateBitmapSourceFromHIcon(SystemIcons.Information.Handle, Int32Rect.Empty, null);
            imageWarn.Source = Imaging.CreateBitmapSourceFromHIcon(SystemIcons.Warning.Handle, Int32Rect.Empty, null);
            imageDebug.Source = Imaging.CreateBitmapSourceFromHIcon(SystemIcons.Question.Handle, Int32Rect.Empty, null);
            
            Title = string.Format("LogViewer  v.{0}", Assembly.GetExecutingAssembly().GetName().Version);
        }

        private void Clear()
        {
            textBoxLevel.Text = string.Empty;
            textBoxTimeStamp.Text = string.Empty;
            textBoxMachineName.Text = string.Empty;
            textBoxThread.Text = string.Empty;
            textBoxItem.Text = string.Empty;
            textBoxHostName.Text = string.Empty;
            textBoxUserName.Text = string.Empty;
            textBoxApp.Text = string.Empty;
            textBoxClass.Text = string.Empty;
            textBoxMethod.Text = string.Empty;
            textBoxLine.Text = string.Empty;
            textBoxfile.Text = string.Empty;
            textBoxMessage.Text = string.Empty;
            textBoxThrowable.Text = string.Empty;
        }

        private void OpenFile(string fileName)
        {
            FileName = fileName;
            LoadFile();
        }

        private void LoadFile()
        {
            textboxFileName.Text = FileName;
            _Entries.Clear();
            listView1.ItemsSource = null;

            DateTime dt = new DateTime(1970, 1, 1, 0, 0, 0, 0);
            string sXml = string.Empty;
            string sBuffer = string.Empty;
            int iIndex = 1;

            Clear();

            try
            {
                FileStream oFileStream = new FileStream(FileName, FileMode.OpenOrCreate, FileAccess.Read, FileShare.ReadWrite);
                StreamReader oStreamReader = new StreamReader(oFileStream);
                sBuffer = string.Format("<root>{0}</root>", oStreamReader.ReadToEnd());
                oStreamReader.Close();
                oFileStream.Close();

                #region Read File Buffer
                ////////////////////////////////////////////////////////////////////////////////
                StringReader oStringReader = new StringReader(sBuffer);
                XmlTextReader oXmlTextReader = new XmlTextReader(oStringReader);
                oXmlTextReader.Namespaces = false;
                while (oXmlTextReader.Read())
                {
                    if ((oXmlTextReader.NodeType == XmlNodeType.Element) && (oXmlTextReader.Name == "log4j:event"))
                    {
                        LogEntry logentry = new LogEntry();

                        logentry.Item = iIndex;

                        double dSeconds = Convert.ToDouble(oXmlTextReader.GetAttribute("timestamp"));
                        logentry.TimeStamp = dt.AddMilliseconds(dSeconds).ToLocalTime();
                        logentry.Thread = oXmlTextReader.GetAttribute("thread");

                        #region get level
                        ////////////////////////////////////////////////////////////////////////////////
                        logentry.Level = oXmlTextReader.GetAttribute("level");
                        switch (logentry.Level)
                        {
                            case "ERROR":
                                {
                                    logentry.Image = LogEntry.Images(LogEntry.IMAGE_TYPE.ERROR);
                                    break;
                                }
                            case "INFO":
                                {
                                    logentry.Image = LogEntry.Images(LogEntry.IMAGE_TYPE.INFO);
                                    break;
                                }
                            case "DEBUG":
                                {
                                    logentry.Image = LogEntry.Images(LogEntry.IMAGE_TYPE.DEBUG);
                                    break;
                                }
                            case "WARN":
                                {
                                    logentry.Image = LogEntry.Images(LogEntry.IMAGE_TYPE.WARN);
                                    break;
                                }
                            case "FATAL":
                                {
                                    logentry.Image = LogEntry.Images(LogEntry.IMAGE_TYPE.FATAL);
                                    break;
                                }
                            default:
                                {
                                    logentry.Image = LogEntry.Images(LogEntry.IMAGE_TYPE.CUSTOM);
                                    break;
                                }
                        }
                        ////////////////////////////////////////////////////////////////////////////////
                        #endregion

                        #region read xml
                        ////////////////////////////////////////////////////////////////////////////////
                        while (oXmlTextReader.Read())
                        {
                            if (oXmlTextReader.Name == "log4j:event")   // end element
                                break;
                            else
                            {
                                switch (oXmlTextReader.Name)
                                {
                                    case ("log4j:message"):
                                        {
                                            logentry.Message = oXmlTextReader.ReadString();
                                            break;
                                        }
                                    case ("log4j:data"):
                                        {
                                            switch (oXmlTextReader.GetAttribute("name"))
                                            {
                                                case ("log4jmachinename"):
                                                    {
                                                        logentry.MachineName = oXmlTextReader.GetAttribute("value");
                                                        break;
                                                    }
                                                case ("log4net:HostName"):
                                                    {
                                                        logentry.HostName = oXmlTextReader.GetAttribute("value");
                                                        break;
                                                    }
                                                case ("log4net:UserName"):
                                                    {
                                                        logentry.UserName = oXmlTextReader.GetAttribute("value");
                                                        break;
                                                    }
                                                case ("log4japp"):
                                                    {
                                                        logentry.App = oXmlTextReader.GetAttribute("value");
                                                        break;
                                                    }
                                            }
                                            break;
                                        }
                                    case ("log4j:throwable"):
                                        {
                                            logentry.Throwable = oXmlTextReader.ReadString();
                                            break;
                                        }
                                    case ("log4j:locationInfo"):
                                        {
                                            logentry.Class = oXmlTextReader.GetAttribute("class");
                                            logentry.Method = oXmlTextReader.GetAttribute("method");
                                            logentry.File = oXmlTextReader.GetAttribute("file");
                                            logentry.Line = oXmlTextReader.GetAttribute("line");
                                            break;
                                        }
                                }
                            }
                        }
                        ////////////////////////////////////////////////////////////////////////////////
                        #endregion

                        _Entries.Add(logentry);
                        iIndex++;

                        #region Show Counts
                        ////////////////////////////////////////////////////////////////////////////////
                        int ErrorCount =
                        (
                            from entry in Entries
                            where entry.Level == "ERROR"
                            select entry
                        ).Count();

                        if (ErrorCount > 0)
                        {
                            labelErrorCount.Content = string.Format("{0:#,#}  ", ErrorCount);
                            labelErrorCount.Visibility = Visibility.Visible;
                            imageError.Visibility = Visibility.Visible;
                        }
                        else
                        {
                            labelErrorCount.Visibility = Visibility.Hidden;
                            imageError.Visibility = Visibility.Hidden;
                        }

                        int InfoCount = 
                        (
                            from entry in Entries
                            where entry.Level == "INFO"
                            select entry
                        ).Count();

                        if (InfoCount > 0)
                        {
                            labelInfoCount.Content = string.Format("{0:#,#}  ", InfoCount);
                            labelInfoCount.Visibility = Visibility.Visible;
                            imageInfo.Visibility = Visibility.Visible;
                        }
                        else
                        {
                            labelInfoCount.Visibility = Visibility.Hidden;
                            imageInfo.Visibility = Visibility.Hidden;
                        }

                        int WarnCount =
                        (
                            from entry in Entries
                            where entry.Level == "WARN"
                            select entry
                        ).Count();

                        if (WarnCount > 0)
                        {
                            labelWarnCount.Content = string.Format("{0:#,#}  ", WarnCount);
                            labelWarnCount.Visibility = Visibility.Visible;
                            imageWarn.Visibility = Visibility.Visible;
                        }
                        else
                        {
                            labelWarnCount.Visibility = Visibility.Hidden;
                            imageWarn.Visibility = Visibility.Hidden;
                        }

                        int DebugCount =
                        (
                            from entry in Entries
                            where entry.Level == "DEBUG"
                            select entry
                        ).Count();

                        if (DebugCount > 0)
                        {
                            labelDebugCount.Content = string.Format("{0:#,#}  ", DebugCount);
                            labelDebugCount.Visibility = Visibility.Visible;
                            imageDebug.Visibility = Visibility.Visible;
                        }
                        else
                        {
                            labelDebugCount.Visibility = Visibility.Hidden;
                            labelDebugCount.Visibility = Visibility.Hidden;
                        }
                        ////////////////////////////////////////////////////////////////////////////////
                        #endregion
                    }
                }
                ////////////////////////////////////////////////////////////////////////////////
                #endregion
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }

            this.listView1.ItemsSource = _Entries;
        }

        #region ListView Events
        ////////////////////////////////////////////////////////////////////////////////
        private void listView1_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            try
            {
                Clear();
                LogEntry logentry = this.listView1.SelectedItem as LogEntry;

                this.image1.Source = logentry.Image;
                this.textBoxLevel.Text = logentry.Level;
                this.textBoxTimeStamp.Text = string.Format("{0} {1}", logentry.TimeStamp.ToShortDateString(), logentry.TimeStamp.ToShortTimeString());
                this.textBoxMachineName.Text = logentry.MachineName;
                this.textBoxThread.Text = logentry.Thread;
                this.textBoxItem.Text = logentry.Item.ToString();
                this.textBoxHostName.Text = logentry.HostName;
                this.textBoxUserName.Text = logentry.UserName;
                this.textBoxApp.Text = logentry.App;
                this.textBoxClass.Text = logentry.Class;
                this.textBoxMethod.Text = logentry.Method;
                this.textBoxLine.Text = logentry.Line;
                this.textBoxMessage.Text = logentry.Message;
                this.textBoxThrowable.Text = logentry.Throwable;
                this.textBoxfile.Text = logentry.File;
            }
            catch { }
        }

        private ListSortDirection _Direction = ListSortDirection.Descending;

        private void ListView1_HeaderClicked(object sender, RoutedEventArgs e)
        {
            GridViewColumnHeader header = e.OriginalSource as GridViewColumnHeader;
            ListView source = e.Source as ListView;
            try
            {
                ICollectionView dataView = CollectionViewSource.GetDefaultView(source.ItemsSource);
                dataView.SortDescriptions.Clear();
                _Direction = _Direction == ListSortDirection.Ascending ? ListSortDirection.Descending : ListSortDirection.Ascending;
                SortDescription description = new SortDescription(header.Content.ToString(), _Direction);
                dataView.SortDescriptions.Add(description);
                dataView.Refresh();
            }
            catch (Exception)
            {
            }
        }
        ////////////////////////////////////////////////////////////////////////////////
        #endregion

        #region DragDrop
        ////////////////////////////////////////////////////////////////////////////////
        private delegate void VoidDelegate();
        private void listView1_Drop(object sender, DragEventArgs e)
        {
            if (e.Data.GetDataPresent(DataFormats.FileDrop))
            {
                try
                {
                    Array a = (Array)e.Data.GetData(DataFormats.FileDrop);
                    if (a != null)
                    {
                        FileName = a.GetValue(0).ToString();
                        Dispatcher.BeginInvoke(
                            DispatcherPriority.Background, 
                            new VoidDelegate(delegate { LoadFile(); })
                            );
                    }
                }
                catch (Exception ex)
                {
                    MessageBox.Show("Error in Drag Drop: " + ex.Message);
                }
            }
        }

        ////////////////////////////////////////////////////////////////////////////////
        #endregion

        #region Menu Events
        ////////////////////////////////////////////////////////////////////////////////
        private void Window_Closing(object sender, CancelEventArgs e)
        {

        }

        private void MenuFileOpen_Click(object sender, RoutedEventArgs e)
        {
            System.Windows.Forms.OpenFileDialog oOpenFileDialog = new System.Windows.Forms.OpenFileDialog();
            if (oOpenFileDialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                FileName = oOpenFileDialog.FileName;
                LoadFile();
            }
        }

        private void MenuRefresh_Click(object sender, RoutedEventArgs e)
        {
            LoadFile();
            listView1.SelectedIndex = listView1.Items.Count - 1;
            if (listView1.Items.Count > 4)
            {
                listView1.SelectedIndex -= 3;
            }
            listView1.ScrollIntoView(listView1.SelectedItem);
            ListViewItem lvi = listView1.ItemContainerGenerator.ContainerFromIndex(listView1.SelectedIndex) as ListViewItem;
            lvi.BringIntoView();
            lvi.Focus();
        }

        private void MenuFileExit_Click(object sender, RoutedEventArgs e)
        {
            this.Close();
        }

        private void MenuAbout_Click(object sender, RoutedEventArgs e)
        {
            About about = new About();
            about.ShowDialog();
        }

        private void MenuFilter_Click(object sender, RoutedEventArgs e)
        {
            Filter filter = new Filter(Entries);
            filter.ShowDialog();
            if (filter.DialogResult == true)
            {
                string level = filter.Level;
                string message = filter.Message;
                string username = filter.UserName;

                List<LogEntry> query = new List<LogEntry>();

                if (level.Length > 0)
                {
                    var q =
                    (
                        from entry in Entries
                        where entry.Level == level
                        select entry
                    ).ToList<LogEntry>();

                    query.AddRange(q);
                }

                if (message.Length > 0)
                {
                    var q =
                    (
                        from entry in Entries
                        where entry.Message.Contains(message)
                        select entry
                    ).ToList<LogEntry>();
                    query.AddRange(q);
                }

                if (username.Length > 0)
                {
                    var q =
                    (
                        from entry in Entries
                        where entry.UserName.Contains(username)
                        select entry
                    ).ToList<LogEntry>();
                    query.AddRange(q);
                }

                this.listView1.ItemsSource = query.Count > 0 ? query : Entries;
            }
        }

        private int CurrentIndex = 0;
        private void Find(int Direction)
        {
            if (textBoxFind.Text.Length > 0)
            {
                if (Direction == 0)
                {
                    for (int i = CurrentIndex+1; i < listView1.Items.Count; i++)
                    {
                        LogEntry item = (LogEntry)listView1.Items[i];
                        if (item.Message.Contains(textBoxFind.Text))
                        {
                            listView1.SelectedIndex = i;
                            listView1.ScrollIntoView(listView1.SelectedItem);
                            ListViewItem lvi = listView1.ItemContainerGenerator.ContainerFromIndex(i) as ListViewItem;
                            lvi.BringIntoView();
                            lvi.Focus();
                            CurrentIndex = i;
                            break;
                        }
                    }
                }
                else
                {
                    for (int i = CurrentIndex-1; i > 0 && i < listView1.Items.Count; i--)
                    {
                        LogEntry item = (LogEntry)listView1.Items[i];
                        if (item.Message.Contains(textBoxFind.Text))
                        {
                            listView1.SelectedIndex = i;
                            listView1.ScrollIntoView(listView1.SelectedItem);
                            ListViewItem lvi = listView1.ItemContainerGenerator.ContainerFromIndex(i) as ListViewItem;
                            lvi.BringIntoView();
                            lvi.Focus();
                            CurrentIndex = i;
                            break;
                        }
                    }
                }
            }
        }

        private void buttonFindNext_Click(object sender, RoutedEventArgs e)
        {
            Find(0);
        }

        private void buttonFindPrevious_Click(object sender, RoutedEventArgs e)
        {
            Find(1);
        }

        private void textBoxFind_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.Key == Key.Enter)
            {
                if (textBoxFind.Text.Length > 0)
                {
                    Find(0);
                }
            }
        }
        ////////////////////////////////////////////////////////////////////////////////
        #endregion

    }
}

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About the Author

Ken C. Len
Software Developer (Senior) LEN Associates Inc.
United States United States
Years of software consulting and software development using Microsoft development products such as Microsoft Content Management System, SQL Server Reporting Service, ASP.Net C# VB.Net, HTML and javascript web development, Visual Studio add-on development, C++ MFC/ATL and COM+ development, and ActiveX components.

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