Events in C# language

[B]Question asked by Visitor Mansoor[/b]

Can someone explain me events in c# language? any example will help.

First I would like u to understand what the event is?
Event in simple meaning is any interaction of a user to the system that causes the system to take actions is event. E.g. when you (a user) click a link (interaction) in this page you initiate an ineraction with this page. Now this ineraction (event) would cause the system to take actions. The event is like waking call to the system. A notification message to the system that says that any thing happened.

the whole processing model is based on this
user<-->Ineraction<-->System<-->Execute Event Code
this is called event driven model.

In C# or VB the event is managed by the delegates that take any event method as an argument and execute proper method whenever user interact with the system. You define event code for any contol or page in seperate method like Page_Load for page loading event or button1_Click method for button..
e.g
protected void button_Click(object sender, EventArgs e)
{
//Your implementaion
}

you register this event as:
button1.OnClik+=new EventHandler(button_Click); //Delegate

But behind the scenes windows OS model manages these events through window messages running on different threads. So you can say the event model in C# is higher level of abstraction of this window messaging.
For further reading please refer to any C# books or MSDN Online.

[COLOR="DarkOrange"]In google search for 'function X ' you'll get a good article on Events and exception handling and many more. It's very good set of articles for beginner[/COLOR]

class DateExample
{
private readonly DateTime _date;

public DateExample(DateTime date)
{
_date = date;
}

public DateTime Date
{
get { return _date; }
}
}

//Create header and column
grid.Headers.Add(new Header());
grid.Headers[0].Add(new Column("Date"));

//Configure the header
grid.Headers[0].StretchMode = ColumnStretchMode.All;
grid.Headers[0][0].SortDirection = SortDirection.Ascending;
grid.Headers[0]["Date"].Format = new StringFormat("d", new CultureInfo("fr-FR"));

//Populate grid with random data
Random random = new Random();
BindingList<DateExample> source = new BindingList<DateExample>();
for (int i = 0; i < 6; ++i)
{
source.Add(new DateExample(DateTime.Now + TimeSpan.FromDays(random.Next(1000))));
}
grid.DataSource = source;

Unformatted values sorting
.net grid is very helpful tutorial