>I want to make a row in a grid (i.e.All columns) read only or read write >If

You can use the DynamicCurrentControl property.

In the init of the column:

This.DynamicCurrentControl = "IIF(Myfile.Stage > 70,'txtReadOnly','txtReadAndWrite')"

All you need to do is add an additional control and change some properties. This approach allows you to have more control over how your users see the grid.