Again, i hope that this isnt me missing the obvious
I taken the standard Add page that has been created by Radzen and thought it would be cool if i could have one of the two text boxes on the form use a lookup. This is easy to do and works brilliantly by changing the type from Text to Lookup and then choosing your dataset and then the text and value fields. I then noticed the multiple check box which then allows you to select more than one result; again, brilliant! However, for some reason nothing is posted through on submit of the form if you select multiple.