i have this Base class
:
public abstract class WiresharkFile
{
protected string _fileName;
protected int _packets;
protected int _packets
Same answer with IIan but for C# 8 and .Net Framework 4.8.
1. Base Model
public class ObservableObject : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
{
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
}
protected virtual void OnPropertyChanged<T>(Expression<Func<T>> raiser)
{
string propName = ((MemberExpression)raiser?.Body).Member.Name;
OnPropertyChanged(propName);
}
protected bool Set<T>(ref T field, T value, [CallerMemberName] string name = null)
{
if (!EqualityComparer<T>.Default.Equals(field, value))
{
field = value;
OnPropertyChanged(name);
return true;
}
return false;
}
}
2. Your Model
public class Current : ObservableObject
{
private string _status;
public Current()
{
Status = "Not Connected";
}
public string Status
{
get { return _status; }
set
{
_status = value;
OnPropertyChanged(); // call this to update
}
}
}
3. How to use?
<Label Content="{Binding Status}"/>
If your xaml is binded to properties of WiresharkFile then a WiresharkFile have to implement the INotifyPropertyChanged, if not it will lead to the memory leaks (Top 3 Memory Leak Inducing Pitfalls of WPF Programming). If your binding is defined only on a Libpcap class then the Libpcap have to implement the INotifyPropertyChanged interface. In my projects I create a base implementation of the INotifyPropertyChanged interface ,and then each base models and base view models just inherits from that implementation. Here some base code: 1. Base implementation:
public class BaseObservableObject : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
{
var handler = PropertyChanged;
if (handler != null) handler(this, new PropertyChangedEventArgs(propertyName));
}
protected virtual void OnPropertyChanged<T>(Expression<Func<T>> raiser)
{
var propName = ((MemberExpression)raiser.Body).Member.Name;
OnPropertyChanged(propName);
}
protected bool Set<T>(ref T field, T value, [CallerMemberName] string name = null)
{
if (!EqualityComparer<T>.Default.Equals(field, value))
{
field = value;
OnPropertyChanged(name);
return true;
}
return false;
}
}
2. Your model (in my opinion):
public abstract class WiresharkFile:BaseObservableObject
{
private string _fileName;
private int _packets;
private int _packetsSent;
private string _duration;
public int Packets
{
get { return _packets; }
set
{
_packets = value;
OnPropertyChanged();
}
}
public int PacketsSent
{
get { return _packetsSent; }
set
{
_packetsSent = value;
OnPropertyChanged();
}
}
}
regards,