How Can I Pass Extra Parameters to Event Handlers?

Enhancing Event Handlers with Additional Parameters

Event handlers frequently require access to data beyond the standard event arguments. This need is easily addressed using lambda expressions or anonymous functions to inject extra parameters.

Let's illustrate with an example:

<code class="language-csharp">private void setup(string extraData)
{
     Object.assignHandler((sender) => evHandler(sender, extraData));
}

public void evHandler(Object sender, string extraData)
{
    // Access 'extraData' within the event handler.
}</code>

Here, the setup function receives extraData. To make this available to evHandler, a lambda expression creates an anonymous function. This function accepts the standard sender argument and passes extraData along to evHandler. As demonstrated, extraData is now accessible within the event handler.

This approach provides a clean and efficient method to pass any necessary data to your event handlers, improving code flexibility and maintainability.

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