public static SelectExpression RemoveGroupExpression(this SelectExpression select, Expression expression)
{
if (select.GroupBy != null && select.GroupBy.Count > 0)
{
List <Expression> groupby = new List <Expression>(select.GroupBy);
groupby.Remove(expression);
return(select.SetGroupBy(groupby));
}
return(select);
}
public static SelectExpression AddGroupExpression(this SelectExpression select, Expression expression)
{
List <Expression> groupby = new List <Expression>();
if (select.GroupBy != null)
{
groupby.AddRange(select.GroupBy);
}
groupby.Add(expression);
return(select.SetGroupBy(groupby));
}