OperatorFilter

It's used to compare types that implements IComparable interface. (Mostly numeric fields). OperatorFilter is a type that implements IFilterableType.So it can be used as a type of a property in Filter object. It's used for dynamic comparison. Both comparison type and comparison value are sent by client.

Properties

OperatorFilter includes following properties;

• Eq: Provides parameter for equal operator == in expression.
• Not: Provides parameter to not equal operator != in expression.
• Gt: Provides parameter to greater than operator > in expression.
• Lt: Provides parameter to less than operator < in expression.
• Gte: Provides parameter to greater than or equal operator >= in expression.
• Lte: Provides parameter to less than or equal operator <= in expression.
• IsNull: Provides parameter to == null comparison in expression.
• IsNotNull: Provides parameter to != null comparison inexpression.

Usage

Use OperatorFilter as type of a property in Filter object.

public class BookFilter : FilterBase
{
    public OperatorFilter<int> TotalPage { get; set; }
}

That property can be used in the following ways in querystring.

/books?totalPage.gte=300 /books?totalPage.isNull=true /books?totalPage.gte=120&totalPage.lte=200

Further reading

• StringFilter