(Sorry if this is easy or impossible. I'm still reasonably new to C# and can't find this anywhere.)

I have created a program containing something similiar to:

PictureBox[] Images = new PictureBox[Total];

Images[0] = new PictureBox();

Images[0].Click += new EventHandler(Clicked_Click);

The thing is that allImages created this wayuse the same EventHandler, as I can't give them all seperate ones because the value of thevariable Total might change at some point. I want all Images to use the same EventHandler, but I only want the Image clicked upon to be affected when the click happens.

So my question is: Is there a way to tell WHICH image was clicked on, or is there a better way to do this?

The value of sender is "System.Windows.Forms.PictureBox, SizeMode: StretchImage" and e returns "System.Windows.Forms.MouseEventArgs", within the EventHandler.

Thanks.

You can cast the sender into PictureBox:

private void Clicked_Click(object sender, EventArgs e)
{
PictureBox picture = sender as PictureBox;
if (picture == null)
return;

//do something on picture clicked using picture variable
}

You can cast the sender into PictureBox:

private void Clicked_Click(object sender, EventArgs e)
{
PictureBox picture = sender as PictureBox;
if (picture == null)
return;

//do something on picture clicked using picture variable
}

Hi,

sender parameter always points to the object, which raised the event. In the Clicked_Click handler, try casting it to PictureBox:

private void Clicked_Click(object sender, EventArgs e)
{
    PictureBox pictureClicked = sender as PictureBox;
    if (pictureClicked == null)
    {
        //Not a picture box...
        return;
    }
    pictureClicked.Image.Save(filename);
}

Andrej

Thanks for the help and quick replies. It helped a lot.

Unfortunately, I am still left with a bit of a problem. I can affect the clicked upon image, but I can't tell which number of the array it is. Is there anyway to use the variable picture from the"PictureBox picture = sender as PictureBox" thing to know which number of the array of Images was clicked on?

Thanks.

When creating picture boxes use Tag property to fill it with array index. When handling the click event read the Tag property.

LOL I was thinking of using the Tag property as a workaround, but your method is a lot better than what I was thinking. It seems so obvious now. Thanks for your help boban.s (and Andrej).

You could also try searching your array and testing equality on each object. I do not know what sort of equality the Image classes uses, though, if it is reference equality or binary equality. Also, this is a less performant approach than using the Tag property ;) It is sometimes appropriate though, usually if you've created your own objects that implement the IEquatable interface, which makes searching through List<T>'s a snap.

Cool. Thanks.