I have a DataTable that has a column that's an int (number of minutes is the definition). I want to edit the column as HH:MM. That means I have to convert the number to a string when starting to edit (I've done that) and convert the string (example "2:15") back to a number when editing the cell is finished. I can't find the proper process to do this last part. I've tried with a standard DataGridViewTextBoxColumn, and I've tried creating a light-weight subclass of this type, but I haven't gotten it yet. I'm sure I'll eventually get it if I thrash around long enough, but I'd appreciate some advice if someone else has already done this or something similar.
