Question : How to create conditional Data Validation lists in Excel?

I am trying to create two Data Validation lists that depend on the value of a third column.  The validation lists are spread across two worksheets in the same workbook.

Sheet1:

Column A has 4 values A1:A4  = 203P, 203PB, 203PC, 176-001 and this range is named amp_type
Column B has 3 values B1:B3 = HI, MED, LO and this range is named 203P_PB_filter
Column C has 2 values C1:C2 = Bypass, 12 and this range is named 176_LP_filter
Column D has 1 value D1 = NA and is named 176_HP_Filter
Column E has 1 value E1 = blank cell and is named 203PC_filter

Sheet 2:

Column A (A1:A15) has data validation list = amp_type
Column B (B1:B15) data validation list depends on user selection from A
Column C (C1:C15) data validation list also depends on the user selection from A

Example:

User selects 203P or 203PB from drop down in A1. Then the only available options for the drop down in B1 and C1 should be the values in the203P_PB_filter range.

If the user selects 176-001 from the drop down in A2, then the available options for B2 should be the 176_LP_filter range and the options for C2 should be from the 176_HP_filter range.

If user selects 203PC from drop down in A3 then the validation list values for both B3 and C3 should come from the 203PC_filter range.

In this example A1,2,3 are just used to show demonstrate the 3 possible states.

I have found numerous examples of similar problems but the solution to those seems to be to use range names = the values listed in the original list. In this case I can not do this. I have attempted to do this within the Excel worksheets using the Data Validation tools with no success. Can someone provide some code on how to best achieve this?

Answer : How to create conditional Data Validation lists in Excel?

Hi,

Try this modification. May not entirely serve the purpose, but may help

Conditional-Validation.xls (22 KB) (File Type Details) 

Modified File