Question

I am currently working with displaying a list of items. I have created a method GetNextItem that returns obj1. When I am calling the method from the buttonClick I get this following error:

Cannot implicitly convert type 'TreeFarm.Form1.fruit_trees' to 'string'.

Not sure why is doing such thing.

public items_list GetNextItem()
{
    items_list obj1 = this.current_item;
    if (obj1 != null)
    {
        current_item = current_item.next_item;
    }
    return obj1;
}

ListForItems mainlist = new ListForItems();
private void ShowNextItem_Click(object sender, EventArgs e)
{

    labelSpecificItem.Text = mainlist.GetNextItem();         
}

Answer 1

You’re trying to convert a value of type items_list in to a string (.Text is of String type). So, if this is one of your objects you can create an implicit cast operator or maybe try using .ToString() or explicitly casting it to a string using (String)mainlist.GetNextItem().

if you desire this kind of assignment and items_list is one of your objects, I would suggest the following addition to that class:

public static implicit operator String(items_list itemslist)
{
    return /* however you want to portray itemslist as a string */;
}

Otherwise you’re going to have to rely on ToString() getting it right.