Way to Use Lookup formula in Data Validation

Original Question:-

How to use Lookup formula in Data Validation?

 

What i want to do sounds simple but I haven’t found a solution.
If name/type is “cable” I want a dropdown list for “att” allowing only code1 values.
If name/type is “htrc” I want a dropdown list for “att” allowing only code2 values.
What I’ve tried is:
- defining a named range called “codes” for $A:$A on sheet1
- data validation for B2 on sheet2 and used formula: =IF($A2=”cable”;INDIRECT(codes=”code1″);INDIRECT(codes=”code2″))
When I’m entering that I’m getting a message saying “The Source currently evaluates to an error. Do you want to continue?” and the dropdown is blank…

Sheet 1:-

image 1

 

Sheet 2:-

 

image 2

 

We create the drop down list and we use the “OFFSET”, “MATCH”, “VLOOKUP” and “COUNTIF” in data validation.

  • Follow below given steps:-
  • Select the cell B2 in sheet 2.
  • Go to Data tab > Data Validation > Settings > List.
  • Enter the formula:- =OFFSET(codes, MATCH(VLOOKUP(G6, Keynames, 2, 0), codes, 0)-1, 1, COUNTIF(codes, VLOOKUP(G6, Keynames, 2, 0)), 1)
  • Click on ok.
  • Copy the Data validation in paste in the range.

image 3

 

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