rasing custom event

[Chad Myers]

I have an event that I am defining in one class, and I want to subscribe to
it in another. I have the delegate for the event in the top of my class:

public delegate void statsUpdatedHandler(object sender, EventArgs e);

I then have the event defined in the class as:

public static event statsUpdatedHandler statsUpdated;

I raise the event in a procedure in the same class. It looks like:

statsUpdated(this,EventArgs.Empty);

I subscribe to the event in my other class by saying:

etalkManager.stats.statsUpdated += new
etalkManager.statsUpdatedHandler(getLatestData);

When the event fires, I get an error saying "object reference not set to an
instance of an object.", and it refers to the line that raises the event in
the original class (statsUpdated(this,EventArgs.Empty)

When calling events, you must make sure that it is not null
(no handlers attached).

You should always make a private or protected method names
something like:

protected void OnStatsUpdated()
{
if( statusUpdated != null )
{
statsUpdated(this, EventArgs.Empty);
}
}

-c

 

[MC D]

I have an event that I am defining in one class, and I want to subscribe to
it in another. I have the delegate for the event in the top of my class:

public delegate void statsUpdatedHandler(object sender, EventArgs e);

I then have the event defined in the class as:

public static event statsUpdatedHandler statsUpdated;

I raise the event in a procedure in the same class. It looks like:

statsUpdated(this,EventArgs.Empty);

I subscribe to the event in my other class by saying:

etalkManager.stats.statsUpdated += new
etalkManager.statsUpdatedHandler(getLatestData);

When the event fires, I get an error saying "object reference not set to an
instance of an object.", and it refers to the line that raises the event in
the original class (statsUpdated(this,EventArgs.Empty)

Thanks for any help!

 

[MC D]

Thanks Chad. That did the trick! Didn't realize that was an issue.

-MC D