I have an UltraGrid bound to a list of elements.

One of the columns is of type double.

I want to conditionally calculate a text string based on user picking this else where:

But cell.Text is readonly

 and 

cell.Value throws an exception, because it wont let me set a string into a double columns value.

How can I do this? 

      private void fGrid1_InitializeRow(object sender, InitializeRowEventArgs e)
      {
               UltraGridCell cell = e.Row.Cells["ColName"];

               cell.Text = DollarFormatting.FormatDollarValue((double)value, DollarsOrPercentage.Percentage, TotalForPercentage);
      }