String.IsNullOrEmpty - don't work

[RPA3]

Hello everyone, I need your help.
I need to check cells for void in Excel. Such a mistake.

[Lahiru.Fernando]

Hi @RPA3

Can you remove the “first_art.ToString”'s .ToString part and try again… So it should look like

String.IsNullOrEmpty(first_art)

also change the data type of first_art to String if it is generic

[RPA3]

What about:
art.Contains(“art”) And model.Contains(“model”) And cost.Contains(“price”) And mass.Contains(“mass”) And sklad.Contains(“wert”) And cell.Contains(“cell”)

I have same error