I am creating a page where users can see information for a chosen customer. On the same page I would also like to show To-Do's and Events filtered by that customer. As seen in the picture, I've added To Do-list and Eventslist as web parts within the DispForm.aspx as well as a bunch of sample data. However, I am unable to connect the lists to the customer.
Any idea how that connection could be made? Sadly I have neither InfoPath nor Visual Studio, I'm stuck with SharePoint Designer. That limits one's code possibilites a lot.
Edit: I cannot create the connections as between "normal webparts"; when trying, I receive "No Provider Schema". I tried also to make the connections in SP Designer, but as shown in the picture below (sorry it's in Swedish) the columns are empty and I cannot continue from there.