Question

I’m trying to make a custom field based on TreeListEx field, in reference to how a custom field was made using TreeList in this article:

http://sdn.sitecore.net/Scrapbook/Custom%20TreeList%20that%20supports%20query.aspx

Basically I need to be able to enable query syntax in the source field. Is there anyway to do this?

Answer 1

OK – so, solved this one. ItemID is not available in the treelistex class as a property, but it is available as a value, and that value is in viewstate. So all you really need to do is expose the viewstate in an itemID property, and use it just like in the treelist control.

public string ItemID
        {
            get
            {
                return StringUtil.GetString(this.ViewState["ItemID"]);
            }
            set
            {
                Sitecore.Diagnostics.Assert.ArgumentNotNull(value, "value");
                this.ViewState["ItemID"] = value;
            }
        }