C# Pass a delegate as an argument

Question

I am aware I can do this:

WebClient client = new WebClient();
client.UploadStringCompleted += delegate(object sender, UploadStringCompletedEventArgs e)
{
    //handle event
};
client.UploadStringAsync(myURI, "POST", "some_data");

But is there a way I can pass an inline delegate as an argument? Something like this:

DoRequest("some_data",
    delegate(object sender, UploadStringCompletedEventArgs e)
    {
        //handle event
    });

public void DoRequest(string data, UploadStringCompletedEventHandler event)
{
    WebClient client = new WebClient();
    client.UploadStringCompleted += event;
    client.UploadStringAsync(myURI, "POST", data);
}

Richard Anthony Hein · Accepted Answer · 2010-12-22 22:34:34Z

3

Yes, that code is correct, except you can't call your parameter event. I'd also use a lambda expression instead because it's nicer.

DoRequest("some_data", (o, e) => {/* handle event */});

answered Dec 22, 2010 at 22:34

Richard Anthony Hein

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Mark Byers · Accepted Answer · 2010-12-22 22:31:13Z

2

Yes, you can write exactly that except that event is a keyword and can't be used as a variable name.

answered Dec 22, 2010 at 22:31

Mark Byers

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1 Comment

Jesse Over a year ago

Yeah I noticed that. Before, I was wrapping an event cast around one of my lines which messed things up. Thanks

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