I have a lot of boolean columns in a grid, and I just wan't to show it as text.
False: 'N'
true:'J'.
The fields are no edit
There are a number of ways to do this. What I would do is use a ValueList and populate it with two items. You can set the DataValue on the item to true/false and the display text to the letter you want. Set the ValueList proeprty on the column and the valuelist will handle translating the booleans into the display texts.