There is a method called AutoSizeColumn / AutoSizeColumns that can be used to automatically calculate the required width to fit the text, this is based on the cell properties as well
I will do it manually after all the cells values was loaded, in order to calculate it manually can you please tell me the equivalence of 1 caracter how many width (single value) must be set to FNCGrid.Columns[ X ].Width???
I mean if one cell has 148 caracters how much represent in terms of WIDTH property???