ExcelHelper.ConvertWithFormat and validation

[DavidBlaa]

in excel there is the value in the cell and a format code.

The function in ExcelHelper converts the value from the cell with the format code so that the system receives the value that the user also entered in Excel.

Due to rounding errors in Excel, a
4.9 becomes 4.9000000001

The language was disregarded and as a result a 4.9 becomes a 4,9 or otherwise, which can no longer be used as a number by the system.

1. check langue settings in the function ToString
2. check validation - should throw errors is its wrong