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Robust Dynamic (Cascading) Dropdowns Without VBA

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Recently I posted about how you could construct dynamic (cascading) dropdowns that could easily handle multiple levels, like this:
Chandoo_CascadingDropdowns_Earliglow

…and we saw that users could subsequently change upstream dropdowns in a way that would make downstream choices invalid, like this:
Chandoo_CascadingDropdowns_Embarrassing
In my previous post I used some VBA to clear out any ‘downstream’ choices if anything ‘upstream’ changed:
Chandoo_CascadingDropdowns_Downstream Reset

Updated for 2024:

Please see my latest article on Dependent Drop-downs using XLOOKUP to implement a simpler and scalable technique. It works great when you have two or multiple levels and can be expanded to an entire table column or sheet column.

A much simpler alternative

My sample file drew on Roger Govier’s excellent approach on the Contextures website, which used two dynamic named ranges to feed the data validation lists, one called MainList and one called SubList. Roberto commented that you could achieve pretty much the same thing with no VBA and with just one validation formula. His approach is pure genius!

Here’s a sample file that utilizes Roberto’s approach:

Click here to download the file

This approach uses a validation formula with a couple of relative references in it. Relative references look for cells that are some predetermined distance left/right and up/down from the active cell. Here’s his formula, which was entered into the Name Manager while cell B8 was selected:
=IF(ISBLANK(Sheet1!C8),IF(DataEntry[#Headers] Sheet1!B:B = DataEntry[[#Headers],[Main Category]],OFFSET(ValidationLists[[#All],[Main Categories]],1,,COUNTA(ValidationLists[Main Categories])),OFFSET(ValidationLists,0,MATCH(Sheet1!A8, ValidationLists[#Headers],0)-1,COUNTA(OFFSET(ValidationLists,,MATCH(Sheet1!A8, ValidationLists[#Headers],0)-1,,1)),1)))

This formulas assumes:

  • You use Excel Tables for both the Validation List and the data entry area, and so uses the associated Structured References that Table functionality allows.
  • Your validation table is called ValidationLists
  • Your data entry table where the dropdowns are is called table is called DataEntry.
  • The column containing your initial dropdowns is called ‘Main Category’
  • The validation list in your validation table that contains your initial categories is called ‘Main Categories’

You will have to amend this formula accordingly if your tables or initial columns have different names.

The relative reference in this formula checks both the cell to the immediate left AND the cell to the immediate right of your current selection. Entering relative references into the Name Manager can be tricky…you first need to select the cell where the formula was originally created – in this case B8 – before you fire up the Name Manager dialog box. (Note that it doesn’t actually matter whether your own file has anything in C8 or not, or whether in fact your dropdowns are somewhere else entirely…rather it’s just that the above formula happens to refer to A8 and C8, and because we want our formula to always reference the cell on the immediate left and immediate right, then we’ve got to select the cell B8 which is in the middle.

Excel Tables – known as ListObjects to VBA developers – were introduced in Excel 2007, and are a very powerful and simple way to store things like lists, chart data, and PivotTable data…especially if you might need to add more data to your spreadsheet at a later date, and want to avoid having to repoint all your formulas to include the additional data. If you’re not familiar with Excel Tables – or you don’t know what that Table1[#Headers] guff above means – then I strongly suggest you check out Chandoo’s Introduction to Structural References or give GOOGLE a spin.

How does this awesome beast work?

Let’s step through it, bit by bit. Note that I’ve put some extra spaces in after each opening formula bracket, purely so this formula will wrap nicely on your monitor. Excel just ignores these extra spaces, so don’t bother taking them out.

=IF(ISBLANK(Sheet1!C8),IF(DataEntry[#Headers] Sheet1!B:B = DataEntry[[#Headers],[Main Category]],OFFSET(ValidationLists[[#All],[Main Categories]],1,,COUNTA(ValidationLists[Main Categories])),OFFSET(ValidationLists,0,MATCH(Sheet1!A8, ValidationLists[#Headers],0)-1,COUNTA(OFFSET(ValidationLists,,MATCH(Sheet1!A8, ValidationLists[#Headers],0)-1,,1)),1)))

That first bit in bold above checks the cell on the immediate right. If that cell on the right is not blank, then that means that the user has already made ‘downstream’ selections. We don’t want the user to change this ‘upstream’ dropdown without clearing those out. Thanks to the IF statement, if that’s the case then none of the rest of the formula gets executed, and the formula just returns FALSE. Data validation can’t handle this FALSE, so users can click on the dropdown button all they like, but nothing will come up. Consequently, the user simply can’t change this ‘upstream’ selection until they’ve first cleared out any selections they previously made in the cells to the right. Pure genius.

Here’s what that looks like:
Chandoo_Robust Dropdowns without VBA_No dropdown
Chandoo_Robust Dropdowns without VBA_Retrospective change
Sweet! Okay, let’s take a look at the rest of the formula:

=IF(ISBLANK(Sheet1!C8),IF(DataEntry[#Headers] Sheet1!B:B = DataEntry[[#Headers],[Main Category]],OFFSET(ValidationLists[[#All],[Main Categories]],1,,COUNTA(ValidationLists[Main Categories])),OFFSET(ValidationLists,0,MATCH(Sheet1!A8, ValidationLists[#Headers],0)-1,COUNTA(OFFSET(ValidationLists,,MATCH(Sheet1!A8, ValidationLists[#Headers],0)-1,,1)),1)))

That bit in bold above checks whether the dropdown is the Main Category column. It does this using the INTERSECT operator, which is a space between two references (in this case of DataEntry[#Headers] B:B the INTERSECT operator is the space between DataEntry[#Headers] and the column reference B:B. Such a space tells Excel to go to the overlap or intersection of those two references, which in this case is the junction between the header row and the column that our dropdown is in.

  • If the current dropdown is in the Main Category column, then this bold bit:
    =IF(ISBLANK(Sheet1!C8),IF(DataEntry[#Headers] Sheet1!B:B = DataEntry[[#Headers],[Main Category]],OFFSET(ValidationLists[[#All],[Main Categories]],1,,COUNTA(ValidationLists[Main Categories])),OFFSET(ValidationLists,0,MATCH(Sheet1!A8, ValidationLists[#Headers],0)-1,COUNTA(OFFSET(ValidationLists,,MATCH(Sheet1!A8, ValidationLists[#Headers],0)-1,,1)),1)))
    …serves up just the list containing our initial categories (i.e. ‘Fruit’, ‘Vegetables’, or ‘Other Stuff’ in this example).
  • If the current dropdown is not in the Main Category column, then this bold bit:
    =IF(ISBLANK(Sheet1!C8),IF(DataEntry[#Headers] Sheet1!B:B = DataEntry[[#Headers],[Main Category]],OFFSET(ValidationLists[[#All],[Main Categories]],1,,COUNTA(ValidationLists[Main Categories])),OFFSET(ValidationLists,0,MATCH(Sheet1!A8, ValidationLists[#Headers],0)-1,COUNTA(OFFSET(ValidationLists,,MATCH(Sheet1!A8, ValidationLists[#Headers],0)-1,,1)),1)))
    …serves up the particular list relevant given the previous choice made in the dropdown to the left.

Wicked, eh!

Normally I don’t advocate the use of volatile functions such as OFFSET if there is a non-volatile alternate (and you’ll hear more about volatility from me in a forthcoming post). But as Roberto points out in his original comment, in this case it doesn’t matter…choices made via dropdowns are not considered volatile by Excel, even if the formulas used to populate that dropdown are volatile.

Like Roger’s approach, Roberto’s approach can handle any number of cascading levels, provided all the category names are unique. All you need to do is simply add the new subcategories to the right hand side of the validations table.

Thanks Roberto…I learned a lot from those comments. Readers, be sure to visit the Frankens Team and check out the crazy things Roberto, Kris & Gábor get up to with Excel.

Download the sample file

Here’s a sample file that utilizes Roberto’s approach:

Click here to download the file

Updates

Check out the updated 2024 version of this technique with XLOOKUP. The formulas are much simpler and it works with any level of validations.

You may also want to check out my good pal Doug Glancy’s approach to this. His version of dependent dropdowns uses Conditional Formatting to alert the user, and ultimately, the analyst, that something is amiss. Be sure to say hi to him in the comments while you’re there, and to subscribe to his blog. Anyone who makes up sample files about fictional International Pie Lovers Associations deserves our eyeballs!

About the Author.

Jeff Weir – a local of Galactic North up there in Windy Wellington, New Zealand – is more volatile than INDIRECT and more random than RAND. In fact, his state of mind can be pretty much summed up by this:

=NOT(EVEN(PROPER(OR(RIGHT(TODAY())))))

That’s right, pure #VALUE!

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59 Responses to “Robust Dynamic (Cascading) Dropdowns Without VBA”

  1. Gary says:

    downloaded workbook doesn't work for me. it's always missing the first selection.
    so, If I choose fruit, apples is not in the dropdown. if I choose vegetables, beets is not in the dropdown

  2. @Gary, you are right, I try to anticipate the reply of Jeff.
    Here’s the right formula, enter into the Name Manager while cell B8 was selected:

    =IF(ISBLANK(C8),IF(DataEntry[#Headers] B:B = DataEntry[[#Headers],[Main Category]],OFFSET(ValidationLists[[#All],[Main Categories]],1,,COUNTA(ValidationLists[Meat])),OFFSET(ValidationLists,,MATCH(A8, ValidationLists[#Headers],0)-1,COUNTA(OFFSET(ValidationLists,,MATCH(A8, ValidationLists[#Headers],0)-1,,1))-1,1)))

  3. UFFF ... i'm sorry ... forget my previous comment 🙁
    Here’s the right formula, enter into the Name Manager while cell B8 was selected:
    =IF(ISBLANK(C8),IF(DataEntry[#Headers] B:B = DataEntry[[#Headers],[Main Category]],OFFSET(ValidationLists[[#All],[Main Categories]],1,,COUNTA(ValidationLists[Meat])),OFFSET(ValidationLists,,MATCH(A8, ValidationLists[#Headers],0)-1,COUNTA(OFFSET(ValidationLists,,MATCH(A8, ValidationLists[#Headers],0)-1,,1)),1)))

    the errors were due to the fact that ValidationLists does not include the header (as I had initially interpreted)

  4. Elias says:

    Great formula as an always Roberto. However, I think it still need some VBA to clean the subcategory selection if the user delete the previous category.

    Regards

    • Ciao Elias! the formula was born from a discussion with Jeff, everyone added something then he wrote this post and he explained the formula ... he gave all the credit to me ... but the merit is more his ... I've only made a mess with these Excel Tables (I'm sorry) 🙂
      anyway thanks

  5. Jeff Weir says:

    Gary: Thanks for the heads up. Have fixed post and sample file.

    Elias: No VBA necessary as users CANNOT delete upstream categories without FIRST manually cleaning out downstream categories. Give the sample file a spin.

    • Elias says:

      Hi Jeff,

      Open the file->go to B8 and press the delete key. Do I missing something?
      Also, the new file’s link is giving and error.

      Regards

      • Jeff Weir says:

        No, it's me that's missing something...I misunderstood what you were saying. So yes, you'd need VBA to do that, along the lines per my previous post. But this is still a great non-VBA solution, apart from that.

        Link fixed.

        Cheer Elias.

  6. Kuldeep J says:

    Great....i was looking something like this in past but end up with only VBA solutions which i really did not liked them because if anyone unknowingly chnage the upper LOV, All the sub selection get vanished and if the person do not know what those LOV, He/She can only hit his head.

  7. LeonK says:

    What a fantastic solution. I'm currently replacing VBA routines with non-VBA ones and this formula has become a major part of my re-modelling. Thank you so much for debating, creating and sharing this formula.

    LeonK

  8. Jeff Weir says:

    Kuldeep and LeonK: Thanks for you kind comments. Without comments like yours, I tend to think that noone finds this stuff useful.

  9. Oxidised says:

    Great solution! shame I needed it 6 months ago, but I'm sure i'll find another use for it soon!

    Certainly do find it useful, keep the awesome posts coming!

  10. Doug Glancy says:

    Nice work, Jeff and Roberto. The VBA-free cascading data validation is a worthy goal.

    At my previous job I regularly sent out Excel surveys to dozens of recipients, and of course couldn't hazard the maintenance nightmare of VBA. I came up with a version of dependent dropdowns that wasn't as self-correcting as this, but uses Conditional Formatting to alert the user, and ultimately, the analyst, that something is amiss. If anybody's interested it's at http://yoursumbuddy.com/user-friendly-survey-without-vba/.

  11. […] Weir explains Robert Mensa’s technique for creating robust dynamic drop downs, without VBA. Just remember, the best we can do is build things that are idiot resistant, not idiot […]

  12. Pablo says:

    Thanks Jeff and Roberto, this is exactly what I was looking for. The timing it's like a miracle! 🙂

    I noticed that the validation is not consistent, in some cells I can type anything I want, but in others the validation rule works. I just copied the cell from the one that was working to the rest and now all are fine. I hope I didn't mess up anything by doing that.
    Thanks again,
    Pablo

  13. […] Howdy folk. Jeff Weir here. You might remember me from shows such as Handle volatile functions like they are dynamite, Did Jeff just Chart, and Robust Dynamic (Cascading) Dropdowns Without VBA. […]

  14. Leonard says:

    Guys, does this work with subcategories beyond 3, per the example? I have a flow chart decision tree with 6 subcategories. My customers are basic users who don't want to read my guidelines or decision tree. I thought dynamic dependent drop downs the best option for this situation. However, I can't seem to find anything on the web that shows beyond 3 categories. If anyone can help show how it could work with the learning/example that Jeff published above, I would be grateful...or if there are better options then drop downs...

    • Jeff Weir says:

      Leonard - yes it can. As per the original article: Like Roger’s approach, Roberto’s approach can handle any number of cascading levels, provided all the category names are unique. All you need to do is simply add the new subcategories to the right hand side of the validations table.

      • Leonard says:

        Thanks Jeff!

        Even though I am basic beginner, I managed to emulate and then modify. Maybe it say somewhere, but I discovered that if your last column in the validation table isn't filled in as far as the 1st column, then you won't get the full first drop down list. I basically created an extra end column that I filled in with bogus numbers so it would work.

        Thanks again!

  15. Enzo says:

    I just implemented this mechanism and it works perfectly. When I close the file and try to open it again, it just crashes Excel, and the file become useless.
    Tested in two different machines and got the same result.
    Anyone with the same problem?
    Tks
    Enzo

  16. Gigi says:

    Hey,

    I did this equation on a template and it worked out well. I set up three different sections with no problem. A few months later when I tried to add two more sections to a different tab, it will not work. Well, at first it worked but then out of the blue the formula is not working. But only for that section. This is what I am typing in with the proper adjustments for the cell I am entering. Also, not sure if this is a part of the problem, I am using macros to dynamically rebuild the ValidationListsD table in the formula.

    =IF(ISBLANK('Budget Details'!H11),IF(DataEntryD1[#Headers] 'Budget Details'!G:G = DataEntryD1[[#Headers],[SC Account Name]],OFFSET(ValidationListsD[[#All],[SC Account Name]],1,,COUNTA(ValidationListsD[SC Account Name])),OFFSET(ValidationListsD,,MATCH('Budget Details'!F11,ValidationListsD[#Headers],0)-1,COUNTA(OFFSET(ValidationListsD,,MATCH(‘Budget Details’!F11,ValidationListsD[#Headers],0)-1,,1)),1)))

  17. Simon Williams says:

    Hi -
    Thanks for the example - something I could never have done myself 🙂

  18. Walter Rizzoli says:

    Fine article and excellent solution for cascading validation lists. Once I found it I couldn't resist trying it. After a while, then, i bumped into an apparently unsolvable problem: when I try copying the sheet which contains DataEntry table, the validation list wouldn't work. I have the ValidationLists in a different sheet.
    Of course, copying the worksheet forces excel to copy the ValName range which remains with the same name but scoped to the new sheet instead of the workbook. The DataEntry table becomes DataEntry2 instead. I thought the problem was that ValName scoped to workbook in the first place, so that having 2 different range named the same, one being scoped to the workbook was the issue. So I decided to change the scope of ValName to the worksheet before copying. The result was the same: validation lists do not appear on the new sheet, while still working fine on the original one.
    Is there anything I am missing or is just that the operation doesn't have an easy solution (meaning I need to set up the whole thing everytime a copy the sheet)?

  19. Cmt says:

    Hi Guys! try this..
    Let us assume you have the main dropdown in cell A1 and its dependent dropdown in cell B1. Also, let us assume that the name of your main validation list is "list1", which means that under validation criteria for cell A1, you Allow List and in source you type"=list1". So, instead of "=list1", try this:
    Under validation criteria for cell A1, Allow - List. In Source, type the following formula...
    =IF(B1"","",list1)
    THAT IS IT! So long as cell B1 is not empty you will not be able to input any value in cell A1.

    • Jeff Weir says:

      Cmt...that works fine for two level dropdowns, where you have set up named ranges ahead of time. But my approach can handle any number of cascading levels (provided all the category names are unique) without having to set up individual named ranges. All you need to do is simply add subcategories to the right hand side of the validations table (Table1). There's more on this in the original article I link to at the top.

  20. Dzordzan says:

    That is AWESOME!!! I am not VBA yet but needed to impress by boss 😀 AND I DID!!! I did impress myself though as well lol! Biggest thanks to you, Chandoo!!! You rock!

  21. Discoblade says:

    This is exactly what I was looking for, except for one issue, I would likre my data input to be on a different sheet to the source table, and I can't seem to make it work...help?

  22. Mangirish Nadkarni says:

    I have tried the formula. My data input is on Opportunity Data sheet from K3:M9999 and my Validation Lists are on DB Sheet from B37:W55. I have "First_Header", "ProductData" and "ValidationLists" in the Name Manager. I tried the formula as: =IF(ISBLANK(Opportunity_Data!L3),IF(ProductData[#Headers] DB!B:B=ProductData[[#Headers],[Customer Billing Plant]],OFFSET(ValidationLists[[#All],[Customer Billing Plant]],1,,COUNTA(ValidationLists[Customer Billing Plant])),OFFSET(ValidationLists,0,MATCH(DB!A36, ValidationLists[#Headers],0)-1,COUNTA(OFFSET(ValidationLists,,MATCH(Sheet1!A36, ValidationLists[#Headers],0)-1,,1)),1))). I am continuously getting the error message regarding incorrect formula with the ValidationLists[[#All] highlighted. Can you please help me?

  23. Prajay Kumar says:

    One more simplest way is to use INDIRECT function.

  24. Jeff Weir says:

    Yes, you can use INDIRECT. But you have to set up a seperate named range for every possible combination, and you can't use spaces (meaning in the example above you would have to use Ozark_Beauty instead of Ozark Beauty). So if you have more than a couple of levels of cascading dropdowns, the INDIRECT approach soon becomes unwieldy.

    Whereas my approach can handle any number of cascading levels (provided all the category names are unique) without having to set up individual named ranges. All you need to do is simply add subcategories to the right hand side of the validations table (Table1). There's more on this in the original article I link to at the top.

  25. Tracy Ormand says:

    I'm working on adapting this to my form. I'm just getting into using VBA and advanced formulas, literally like three days ago! I was wondering if this will work with my project. I have a very simple form that I created using one downstream dropdown to capture a group and subgroup. I only have the one table where my source data is pulled from. There are no headers in my data entry (form) area either. Just want to make sure its possible. I'm hoping to understand this better once my Vyvanse kicks in!

    Kind regards

    • Jeff Weir says:

      Yes, this should work. Setting it up can be a bit complicated, so if you get stuck, perhaps the best way to proceed is to download the example, and change it to suit your needs.

  26. Jim says:

    Hi Chandoo,
    Your formulas have worked wonders for me, however after finally being able to apply this "Robust-dynamic-cascading-dropdowns-without-vba", it seems I could not get the dropdowns to work if I duplicate the worksheet and rename. When I pull up the Name Manager, it seems the originally created table and Name Ranges are scoped to Workbook, and new Names exist scoped to specific Worksheet.

    Not sure if I make any sense, but in simple terms, I duplicated sheet 1, rename to sheet 2, click on the same cell with data validation, no drop-down appears.

    Any idea?

    • Jeff Weir says:

      Hi Jim. I'm the author of this guest post, not Chandoo. You'll simply have to create new names that don't conflict with the old.

  27. Jim says:

    Hi Jeff, sorry I didn’t notice... anyway, thanks for the reply, just realised the sheet names and formulas will then have to match accordingly, it works fantastic now! A thousand sincere thanks!!! 😉

  28. Michael says:

    Hi Jeff,

    Thanks for this post, this was very helpful. I am trying to tweak this formula to accommodate a similar dynamic drop-down structure, but in a different format. My DataEntry table must be formatted a certain way to meet upload requirements.

    In my case on the DataEntry table, my "Main Category' drop downs are the table headers (So picture Fruits, Vegetables, and Other Stuff, in B7:D7) and my dependent sub-category drop-downs (only using 1) are in the rows directly underneath (ex. Apples, Beets, Bread as selections in B8:D11)

    My Validation table has my Main Category selections as column headers with all the sub-category values listed underneath. (I hadnt considered an Initial List since I only have 1 dependent drop-down list)

    I can change the validation table in any way I want but the DataEntry table must stay in this format. Is there a way to rearrange the formula to accommodate this while maintaining functionality?

    Thanks!
    Michael

    • Jeff Weir says:

      I'm afraid not, Michael. You'll have to research for a different approach.

    • Chandoo says:

      In this case, you can use the example demonstrated here:

      https://chandoo.org/wp/cascading-drop-down/

      • Michael says:

        Hi Chandoo,

        Thanks for this, unfortunately I cannot use this as I will need to copy the validation over to multiple columns to the right, and also have the dependent drop down validation copied down to multiple rows. So I wont be able to have the IFERROR formula that displays the red X next to my drop-downs, nor can I put it underneath. Similarly I will need to format my validation values as a table so I can add new items to each drop-down as I please.

        Based on this criteria, is VBA my only option here?

  29. Leonardo says:

    Hi Chandoo,

    I use Excel for Mac 2016, so when I try to paste my version of the suggested formula the range of cells box truncates it to 255 characters max (my formula has 455 characters).

    Is there a way to get around this situation?

    I tried splitting it up in two and using CONCATENATE to combine it together but it didn't work. Maybe I'm doing it or there's a more clever way to circumvent this limitation...

  30. Barry says:

    Hi! This solution is perfect for me! I am trying to use Cascading Drop-downs on a protected sheet and don't want to get into VBA to get around that. I would only need to adapt the Headings and Category names.

    I can do this easily and it works perfectly on the worksheet I downloaded from you.

    However - I think I am having the same trouble as Leonardo above - When I try to copy the sheet into my existing workbook, it fails. It says I am missing a parenthesis. I am also using Excel for Mac 2016. But I don't understand why it works on the worksheet I downloaded, but not when trying to integrate it into a new workbook. Thanks for any help!

  31. Barry says:

    Actually I figured it out - if I "copied" your worksheet into mine, the problems occurred. If I "moved" the worksheet into mine, it worked perfectly, thanks again for providing this innovative solution, now I can use these lists on a protected workbook with no VBA to work around!

  32. Pierre says:

    Hi everyone,
    First of all, thank you for this article, it is really insightful.
    I have a question regarding this topic tho.
    My question is "How many levels of dynamic (cascading) dropdowns can you construct ?".
    In order terms, would it be possible to add a 4th level with illegal characters in the example above ?
    I tried to research that really hard but could not find anything. Any help is welcome.
    Thank you,
    Pierre

  33. Thomas says:

    Hi, I am looking for a formula where the cell content changes from selecting the options in a dropdown. For example: when I select week as an option in the dropdown then my dashboard will give me report week wise information. From Cell A5 to A15 the weeks should be reflecting and based on that weeks the other column cells should give the info. Likewise when I select the option as Month then the same cells A5 to A15 should show the months and based on the month the other column cells will give the report. And other this is, only the available week or month should reflect in the A5 to A15 Cells from the dump.

  34. Miguel says:

    I need help!
    I have 2 columns one with date which can repeat and another with date that vary along the day as multiple tests are executed during the day. I need a cascading dropdown, than upon selection of the date, user's can choose the time at which the report was executed to look at the data.
    my 2 tables look like this:
    Date Hour
    20/10/2020 13:45
    20/10/2020 15:34
    07/10/2020 20:00
    09/10/2020 20:45
    09/10/2020 21:45

    How would the formulas look for a scenario where I don't have and categories listed on the top row?

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