Represents a rating scale field that is used in surveys.
Assembly: Microsoft.SharePoint (in Microsoft.SharePoint.dll)
Available in Sandboxed Solutions: Yes
Available in SharePoint Online
If you set properties of the SPFieldRatingScale class you must call the Update method for changes to take effect in the database.
The field value for the SPFieldRatingScale class is contained in the SPFieldRatingScaleValue class. For information about creating custom field value classes, see How to: Create a Custom Field Value Class.
An SPFieldRatingScale object can be rendered through the RatingScaleField server control.
The SPFieldRatingScale class corresponds to the GridChoice data type that is specified through the Type attribute of the Field element.Notes to Inheritors
In SharePoint Foundation, columns based on custom field types are read-only in Datasheet view.