Passing data with events

Question

I need to pass data with an event. Currently, when receiving more data (via comport), the event will fire but the previous event (&data) is not handled yet, so the data gets overwritten. How can I handle the event &data in a safe way? I have multiple events like this (15x), so I am not sure if using a queue for the data is the best way or pass data along with the event (like S.O. item 4215845). Example (this example is with a string, but I also use arrays, bools etc): At the 'sender' side (class1): ``` public event EventHandler evDiaStringMessage = delegate { }; private void evDiaStringMessageEvent() { evDiaStringMessage(this, new EventArgs()); } private static string _DiaString; public string DiaString { get { return _DiaString; } set { _DiaString = value; } } ``` DiaString contains the data and gets overwritten when evDiaStringMessage is fired too soon. At the 'receiver / GUI' side (class2): ``` dia.evDiaStringMessage += new EventHandler(dia_evDiaStringMessage); private delegate voi…

Accepted Answer

You can store your data in a custom EventArgs class:

```
public class ReceivedDataEventArgs : EventArgs
{
   // Add the properties you require
}
```

The event is defined like so:

```
public event EventHandler<ReceivedDataEventArgs> ReceivedData;
```

Your handler will take in an instance your class instead of the `EventArgs` object, and hence you'll have the correct data.

Passing data with events

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