So, let’s demonstrate how to use it
1-using System.ComponentModel;
2-Let’s your specific class inherit from INotifyPropertyChanged interface and expose its member public event PropertyChangedEventHandler PropertyChanged
3-Create your function to fire the event.
4-In each property you need to be in synchronization with GUI in your class in its setter call the function you have created in point 3
After following my instruction I managed to write these lines:
using System.ComponentModel; //point 1
class Person:INotifyPropertyChanged //point 2
{
string name;
public string Name
{
get { return name; }
set { name = value;
OnPropertyChanged("Name");//point 4
}
}
protected void OnPropertyChanged(string property)//point 3
{
if (PropertyChanged != null)
{
PropertyChanged(this,new PropertyChangedEventArgs(property));
}
}
public event PropertyChangedEventHandler PropertyChanged;//point 2
So, whenever person name has changed I’ll know that.
I’ll write a function in the Form class that uses this event and responses to it.
Person p = new Person("FCI-H", 1);
nameTxt.Text = p.Name;
p.PropertyChanged += new System.ComponentModel.PropertyChangedEventHandler(p_PropertyChanged);
void p_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs
e)
{
switch (e.PropertyName)
{
case "Name":
nameTxt.Text = p.Name;
break;
}
}
So, whenever person name changed, Form textbox (nameTxt) will have the recent value, without writing additional code
You can download the full and commented sample from here
