ASP .NET datalist does not recognize item in ItemDataBound event

Question

I have a datalist and I'm trying to apply a css class to a panel inside some of the items like so:

protected void DataListProducts_ItemDataBound(object sender, DataListItemEventArgs e)
{
    if (e.Item.ItemType != ListItemType.Header)
    {
        ProductsService service = new ProductsService();
        DataTable dt = service.GetProduct(DataListProducts.DataKeys[e.Item.ItemIndex].ToString()).Tables[0];
        if (((int)dt.Rows[0]["Quantity"]) <= 0)
        {
            Panel overlay = (Panel)DataListProducts.Items[e.Item.ItemIndex].FindControl("overlay");
            overlay.CssClass = "soldOut";
        }
    }
}

When I try to run it I get the error

"Index was out of range. Must be non-negative and less than the size of the collection."

I found out that the item index is equal to the item count of the datalist, which I think means the item hasn't been created yet, but shouldn't the ItemDataBound event fire after the item has been created and databound? Can someone please explain this to me?

I've tried that but it simply selects the previous item or gives another error if the item was the first one.. — Lambusy
Is the exception is being raised service.GetProduct(...) or at some other line. Can you share this method too. — Suprabhat Biswal
service.GetProuct() returns a dataset with a single row through a primary key, the exception isn't raised there — Lambusy

Lambusy Lambusy · Accepted Answer · 2015-12-03T07:01:11

Well, kinda solved it. I still don't know what the problem was, but iterating through the datalist with a foreach loop in a different function after the datalist has been databound gives me the desired effect.

ASP .NET datalist does not recognize item in ItemDataBound event

1 Answers