>Hi everybody,
>
>Quite often I am getting an exception about Invalid format. Say, I just got one here
>
>

>Byte instr_type = Convert.ToByte(GetParameterValue(rowValues, "instr_type"));

>
>The value is returned as empty string and apparently ToByte and other conversions can not deal with empty string. So, EVL function may be helpful here.
>
>Is there any way to write this expression to not get exception without doing this with extra variable first?
>
>Thanks in advance.

Would Byte.TryParse work for you?