How to populate read only grid from list (Text) in constant file

This should help you

https://docs.appian.com/suite/help/20.3/grid-with-selection-pattern.html

replace data array in line 25 with your constant.

I have started getting this error (below)

Could not display interface. Please check definition and inputs. Interface Definition: Expression evaluation error at function a!gridField [line 21]: Could not cast from Text to Map. Details: CastInvalidCould not cast from Text to Map. Details: CastInvalid

a!gridField(
                label: "Employee Directory",
                data: todatasubset(
                  cons!ABC_List,
                  fv!pagingInfo
                ),
                columns: {
                  a!gridColumn(
                    label: "Name",
                    sortField: "name",
                    value: fv!row.name
                  )
                }

I have started getting this error (below)

Could not display interface. Please check definition and inputs. Interface Definition: Expression evaluation error at function a!gridField [line 21]: Could not cast from Text to Map. Details: CastInvalidCould not cast from Text to Map. Details: CastInvalid

a!gridField(
                label: "Employee Directory",
                data: todatasubset(
                  cons!ABC_List,
                  fv!pagingInfo
                ),
                columns: {
                  a!gridColumn(
                    label: "Name",
                    sortField: "name",
                    value: fv!row.name
                  )
                }

You need to turn the list of strings into a list of maps.

a!gridField(
  label: "Employee Directory",
  data: todatasubset(
    a!forEach(
      items: {"a", "b", "c"},
      expression: {name: fv!item}
    ),
    fv!pagingInfo
  ),
  columns: {
    a!gridColumn(
      label: "Name",
      sortField: "name",
      value: fv!row.name
    )
  }
)

This is working and you would want to replace the list in line 5 with your constant.

Thanks it worked!

One last thing, First row in the grid is empty for some reason, I already verified I don't have any space or just character because of which that first row would be showing empty.

You might want to make the data visible. Either in the interface or in a small test-expression. Then you can see what it exactly is. A paragraph field can do that. Make sure to replace the fv!pagingInfo by a custom paging info as it is only available inside the gridField.

Issue resolved

Thank You!