How to create named ranges based on tree structure to be used for dropdowns

[Columbus5]

Hi everyone,

I have a tree (data) structure (see below) from which I would like to create dynamic drop down lists that will be in another workbook for users to answer. The drop downs in the other workbook will be based on the formula of indirect as I want users to get pre-selected options to answer (e.g. if you answer Europe as Region in first dropdown, you should only be able to see countries in Europe as selection options in the next dropdown, and so forth). My idea around this is to create named ranges for each level in the tree structure (e.g. all countries belonging to Europe are defined as Europe, and all cities belonging to Denmark are defined as Denmark) to enable indirect formula in the dropdowns. However, the document contains several hundreds of rows and I want to create the named ranges automatically based on the hierarchical structure. I assume a macro is needed for this. It would be very appreciated if someone can help me with this?

Region	Country	City	Office
Europe	Denmark	Copenhagen	Fredriksberg
North America	USA	Los Angeles	Malibu
Europe	France	Paris	La Défense
Asia	China	Shanghai	Hongqiao
Europe	Denmark	Copenhagen	Nyhavn

 

[DRSteele]

Welcome to the forum.

I think this webpage might include the answer for you regarding dependent data validation. It just might be that a macro will be what you end up needing, but I think that material is relevant.

 

[Columbus5]

Welcome to the forum.

I think this webpage might include the answer for you regarding dependent data validation. It just might be that a macro will be what you end up needing, but I think that material is relevant.

Hi, the webpage supports me to a certain extent but not fully. I have several multiple precedents in second and third column and I only want unique names in the dropdowns. I am not able to manage that with a large selection of data automatically. any advice on formulas for dropdowns that are only identifying unique values from the columns and connecting them to underlying names automatically?