How to create dependent dropdownlist using XlsIO?

XlsIO allows to create dependent dropdownlist in data validation using INDIRECT formula in data validation list source. The following steps illustrates with code snippets on how to achieve the requirement.

1. Create named ranges for the range of cells. Here we have created the 4 Named Ranges and the following table describes the named ranges and it’s refer to ranges. Add meaningful values in these ranges.

2. Choose a cell to create the dropdownlist and set the data validation. Here, we have selected the B8 Cell and applied data validation with list values which refers to a NamedRange (Food).
3. Select a next cell to apply data validation which depends on the previous data validation list. Here, we have selected the cell “B10” and applied data validation with list type and assigned the list source as “=INDIRECT($B1)”. (INDIRECT function is used to return the reference, specified by the string from the drop down list).

C#

VB

You can find the sample here.