WPF SelectedItem binding between two datagrids

I am developing a User Interface for a host monitoring application, which is already being monitored on database level. I have displayed 2 datagrids on my UI which will populate on run time.These two datagrids are connected by the HostID ( HostID is the Foreign Key in the LogDatagrid).

The First datagrid displays the list of Host with their Status(either Running or Stopped). I would like to display the Log Status of the respective HostID when a user wants to know the status in detail. How to achieve this when a user selects the Host ID in the HostDatagrid ? I have added my XAML and screenshot of my UI. ( the datagrid data is populated from a Database-kindly have a look in the ViewModel code).May I know how do I the binding between the selected Item in the Host datagrid to the respective details getting displayed in the Log datagrid? Kindly help
May I know how I do the binding between selected Item in grid and controls in the detail UI?

here is the Model of my class

public LogFileModel()
    {

    }
    private int _hostID;
    public int HostID
    {
        get { return _hostID; }
        set { _hostID= value; OnpropertyChanged("HostID"); }
    }

    private string _logid;
    public string LogID
    {
        get { return _logid; }
        set { _logid= value; OnpropertyChanged("LogID"); }
    }

    private string _logpath;
    public string LogPath
    {
        get { return _logPath; }
        set { _logPath = value; OnpropertyChanged("LogPath"); }
    }

    private DateTime _date;
    public DateTime Date;
    {
        get { return _date; }
        set { _date= value; OnpropertyChanged("Date"); }
    }

    private bool _activity;
    public bool LastActivity
    {
        get { return _activity; }
        set { _activity= value; OnpropertyChanged("LastActivity"); }
    }

ViewModel for my log table

LogModel _myModel = new LogModel();
private ObservableCollection<LogFileModel> _logData = new  ObservableCollection<LogFileModel>();
  public ObservableCollection<LogFileModel> LogData
    {
        get { return _logData; }
        set { _logData = value; OnPropertyChanged("LogData"); }
    }
   public LogViewModel()
    {
        initializeload();
        timer.Tick += new EventHandler(timer_Tick);
        timer.Interval = new TimeSpan(0, 0, 3);
        timer.Start();
    }

    ~LogViewModel()
    {
        Dispose(false);
    }

    protected virtual void Dispose(bool disposing)
    {
        if (!disposed)
        {
            if (disposing)
            {
                timer.Stop();
                timer.Tick -= new EventHandler(timer_Tick);
            }
            disposed = true;
        }
    }

    private void timer_Tick(object sender, EventArgs e)
    {
        try
        {
            LogData.Clear();
            initializeload();
        }
        catch (Exception ex)
        {
            timer.Stop();
            Console.WriteLine(ex.Message);

        }
    }

    private void initializeload()
    {
        try
        {
            DataTable table = _myModel.getData();

            for (int i = 0; i < table.Rows.Count; ++i)
                LogData.Add(new LogFileModel
                {
                   HostID= Convert.ToInt32(table.Rows[i][0]),
                   LogID = table.Rows[i][1].ToString(),
                   LogPath = table.Rows[i][2].ToString(),
                   Date = Convert.ToDateTime(table.Rows[i][3]),
                   LastAcivity= table.Rows[i][4].ToString(),                   
                });
        }

        catch (Exception e)
        {
            Console.WriteLine(e.Message);
        }
    }
    public event PropertyChangedEventHandler PropertyChanged;

    private void OnPropertyChanged(string propertyname)
    {
        var handler = PropertyChanged;
        if (handler != null)
            handler(this, new PropertyChangedEventArgs(propertyname));
    }

    public class LogModel
    {
        public DataTable getData()
        {
            DataTable ndt = new DataTable();
            SqlConnection sqlcon = new SqlConnection(ConfigurationManager.ConnectionStrings["MyConnectionString"].ConnectionString);
            sqlcon.Open();
            SqlDataAdapter da = new SqlDataAdapter("SELECT * FROM [LocalDB].[dbo].[LogFiles]", sqlcon);
            da.Fill(ndt);
            da.Dispose();
            sqlcon.Close();
            return ndt;
        }
    }
}

EDIT
I have added a new MainViewModel to my existing program

public class MainViewModel : ViewModel
{
    private LogViewModel _SubLogViewModel = new LogViewModel();
    public LogViewModel SubLogViewModel
    {
        get
        {
            return _SubLogViewModel;
        }
        set
        {
            if (_SubLogViewModel != value)
            {
                _SubLogViewModel = value;
                OnpropertyChanged("SubLogViewModel");
            }
        }
    }

    private HostViewModel _SubHostViewModel = new HostViewModel();
    public HostViewModel SubHostViewModel
    {
        get
        {
            return _SubHostViewModel;
        }
        set
        {
            if (_SubHostViewModel != value)
            {
                _SubHostViewModel = value;
                OnpropertyChanged("SubHostViewModel");
            }
        }
    }

    private Host _SelectedHost;
    public Host SelectedHost
    {
        get
        {
            return _SelectedHost;
        }
        set
        {
            if (_SelectedHost!= value)
            {
                _SelectedHost= value;
                OnpropertyChanged("SelectedHost");
                if(this.SelectedHost != null && this.SubLogViewModel != null)
                {
// I dont know how to get the values for Log grid. here Loadlogs is just an imaginary method I have added , it is not defined in my program.
 
                    this.SubLogViewModel.LoadLogs(this.SelectedHost);
                }
            }
        }
    }
}

EDIT : New Xaml

<Grid>
    <Grid.DataContext>
        <host:MainViewModel />
    </Grid.DataContext>

    <DataGrid Name="hostDataGrid" DataContext="{Binding SubHostViewModel}" SelectedItem="{Binding SelectedHost, Mode=TwoWay}">
        ...
    </DataGrid>

    <DataGrid Name="LogDatagrid" DataContext="{Binding SubLogViewModel}">

    </DataGrid>
</Grid>

Kindly help me to proceed further.
Thanks to whom ever it may concern.

Tags: C#, XAML, WPF