using System;
using System.Windows.Forms;
using System.Diagnostics;
using System.Text;

namespace EventLogView
{
  public partial class Form1 : Form
  {
    public Form1()
    {
      InitializeComponent();
    }

    public EventLog[] evls;
    public EventLog evl;
    string machine = Environment.MachineName;

    private void Form1_Load(object sender,EventArgs e)
    {
      evls = EventLog.GetEventLogs(machine);
      ComboBoxFüllen();
      bindingNavigator1.BindingSource = new BindingSource(evl, "Entries");
      bindingNavigator1.BindingSource.CurrentChanged += new EventHandler(BindingSource_CurrentChanged);
      propertyGrid1.SelectedObject = bindingNavigator1.BindingSource.Current;
    }

    void BindingSource_CurrentChanged(object sender,EventArgs e)
    {
      if (bindingNavigator1.BindingSource != null)
        propertyGrid1.SelectedObject = bindingNavigator1.BindingSource.Current;
    }

    private void ComboBoxFüllen()
    {
      cmbEventLogName.DataSource = evls;
      cmbEventLogName.DisplayMember = "Log";
      cmbEventLogName.ValueMember = "Log";
    }

    private void cmbEventLogName_SelectedIndexChanged(object sender,EventArgs e)
    {
      evl = new EventLog(((EventLog)cmbEventLogName.SelectedItem).Log,machine);
      bindingNavigator1.BindingSource = new BindingSource(evl,"Entries");
      bindingNavigator1.BindingSource.CurrentChanged += new EventHandler(BindingSource_CurrentChanged);
      if (bindingNavigator1.BindingSource != null)
        propertyGrid1.SelectedObject = bindingNavigator1.BindingSource.Current;
    }

    private void cmbEntryNr_SelectedIndexChanged(object sender,EventArgs e)
    {
      if (bindingNavigator1.BindingSource != null)
        propertyGrid1.SelectedObject = bindingNavigator1.BindingSource.Current;
    }

    private void btnData_Click(object sender,EventArgs e)
    {
      EventLogEntry entry = (EventLogEntry)bindingNavigator1.BindingSource.Current;
      string dataString = "Data-Eigenschaft kann nicht als ASCII-String geparst werden.";
      try
      {
        dataString = "<Anfang>" + Encoding.ASCII.GetString(entry.Data)+"<Ende>"+
          "\r\n(Die Data-Eigenschaft beinhaltet Binärdaten beliebiger Form.\r\n"+
          "Manchmal 4-Byte Integer, oder 2-Byte Short oder anderes und ist deswegen\r\n" +
          "nicht immer als String darstellbar)";
      }
      catch { }
      MessageBox.Show("Data-Eigenschaft als String:\r\n" +  dataString);
    }
  }
}