CODEWITHSUNDEEP
c#arraysevents
Mike
Mike

Reputation: 65

How to create events for objects in an array?

I'm trying to create several objects and add them into an array which I can do but then I would like to have one event for all the objects. For example I have 50 picture boxes in an array that are created dynamically and I need to get the picture from the one I click. How do I go about doing this without making 50 seperate events?

Upvotes: 2

Views: 2576

Answers (2)

Ed Swangren
Ed Swangren

Reputation: 124682

You hook up an event handler to Click event of each PictureBox. Use the sender argument to obtain a reference to the specific PictureBox that was clicked (that's what sender is there for if you didn't know; whichever object raised the event will get passed to the handler as the sender parameter).

private void HookUpEventHandlers()
{
    var someListOfPicBoxes = GetPicBoxList();
    foreach(var p in someListOfPicBoxes)
    {
        p.Click += p_Click;
    }
}

private void p_Click(object sender, EventArgs e)
{
    // this is the PictureBox that was clicked
    var pb = (PictureBox)sender;
}

Upvotes: 7

competent_tech
competent_tech

Reputation: 44931

You create one event handler and add it to each of the items that you create:

Add the items:

        for (int nI = 0; nI < 50; nI++)
        {
            PictureBox oBox;

            oBox = new PictureBox();
            oBox.Click += pictureBox_Click;

            // Add to your array
        }

Add the eventhandler:

    private void pictureBox_Click(object sender, EventArgs e)
    {
        // Get a local reference to the box that was clicked
        PictureBox oBox = sender as PictureBox;

    }

Upvotes: 0

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