public override object GetClusterKey(object model) {
// Get the data attribute we want from the given model
// Make sure the returned value is a DateTime
DateTime? dateTime = this.Column.GetValue(model) as DateTime?;
if (!dateTime.HasValue)
return null;
// Extract the parts of the datetime that we are intereted in.
// Even if we aren't interested in a particular portion, we still have to give it a reasonable default
// otherwise we won't be able to build a DateTime object for it
int year = ((this.Portions & DateTimePortion.Year) == DateTimePortion.Year) ? dateTime.Value.Year : 1;
int month = ((this.Portions & DateTimePortion.Month) == DateTimePortion.Month) ? dateTime.Value.Month : 1;
int day = ((this.Portions & DateTimePortion.Day) == DateTimePortion.Day) ? dateTime.Value.Day : 1;
int hour = ((this.Portions & DateTimePortion.Hour) == DateTimePortion.Hour) ? dateTime.Value.Hour : 0;
int minute = ((this.Portions & DateTimePortion.Minute) == DateTimePortion.Minute) ? dateTime.Value.Minute : 0;
int second = ((this.Portions & DateTimePortion.Second) == DateTimePortion.Second) ? dateTime.Value.Second : 0;
return new DateTime(year, month, day, hour, minute, second);
}
