Class FieldExpression

The FieldExpression class represents a property or member of some data in a logical expression.

Inheritance

System.Object

FilterExpression

FieldExpression

Inherited Members

System.Object.ToString()

System.Object.Equals(System.Object, System.Object)

System.Object.ReferenceEquals(System.Object, System.Object)

System.Object.GetType()

System.Object.MemberwiseClone()

Namespace: EPiServer.Social.Common

Assembly: EPiServer.Social.Common.dll

Version: 1.5.4

Syntax

public class FieldExpression : FilterExpression

Constructors

FieldExpression(String, Type)

Constructor

Declaration

public FieldExpression(string identifier, Type valueType)

Parameters

Type	Name	Description
System.String	identifier	Unique identifier for the field
System.Type	valueType	Type of value stored by the field represented by this expression

FieldExpression(String, Type, FieldExpression)

Constructor

Declaration

public FieldExpression(string identifier, Type valueType, FieldExpression parent)

Parameters

Type	Name	Description
System.String	identifier	Unique identifier for the field
System.Type	valueType	Type of value stored by the field represented by this expression
FieldExpression	parent	Expression representing the parent field to this field.

Properties

HasParent

Returns true if the field represented by this expression has a parent field.

Declaration

public bool HasParent { get; }

Property Value

Type	Description
System.Boolean

Identifier

Gets the unique identifier for this field.

Declaration

public string Identifier { get; }

Property Value

Type	Description
System.String

Parent

Gets the expression representing the parent field to this field.

Declaration

public FieldExpression Parent { get; }

Property Value

Type	Description
FieldExpression

ValueType

Gets the type of value stored by the field represented by this expression.

Declaration

public Type ValueType { get; }

Property Value

Type	Description
System.Type

Methods

Accept(FilterExpressionVisitor)

Accepts a visitor capable of interpreting this expression.

Declaration

public override void Accept(FilterExpressionVisitor visitor)

Parameters

Type	Name	Description
FilterExpressionVisitor	visitor	Visitor to be accepted

Overrides

FilterExpression.Accept(FilterExpressionVisitor)

Equals(Object)

Returns true if the specified object is equivalent to this FieldExpression, false otherwise.

Declaration

public override bool Equals(object obj)

Parameters

Type	Name	Description
System.Object	obj	Object to be compared

Returns

Type	Description
System.Boolean	True if the specified object is equivalent to this FieldExpression, false otherwise.

Overrides

System.Object.Equals(System.Object)

GetHashCode()

Gets the hash code for this FieldExpression.

Declaration

public override int GetHashCode()

Returns

Type	Description
System.Int32	Hash code

Overrides

System.Object.GetHashCode()

Operators

Equality(FieldExpression, Boolean)

Creates a new EqualToExpression representing a comparison of the field represented by this expression to the specified value.

Declaration

public static FilterExpression operator ==(FieldExpression field, bool value)

Parameters

Type	Name	Description
FieldExpression	field	Expression identifying field to be compared
System.Boolean	value	Value to compare against the field

Returns

Type	Description
FilterExpression	EqualToExpression for this field and the specified value

Equality(FieldExpression, DateTime)

Creates a new EqualToExpression representing a comparison of the field represented by this expression to the specified value.

Declaration

public static FilterExpression operator ==(FieldExpression field, DateTime value)

Parameters

Type	Name	Description
FieldExpression	field	Expression identifying field to be compared
System.DateTime	value	Value to compare against the field

Returns

Type	Description
FilterExpression	EqualToExpression for this field and the specified value

Equality(FieldExpression, Double)

Creates a new EqualToExpression representing a comparison of the field represented by this expression to the specified value.

Declaration

public static FilterExpression operator ==(FieldExpression field, double value)

Parameters

Type	Name	Description
FieldExpression	field	Expression identifying field to be compared
System.Double	value	Value to compare against the field

Returns

Type	Description
FilterExpression	EqualToExpression for this field and the specified value

Equality(FieldExpression, Int64)

Creates a new EqualToExpression representing a comparison of the field represented by this expression to the specified value.

Declaration

public static FilterExpression operator ==(FieldExpression field, long value)

Parameters

Type	Name	Description
FieldExpression	field	Expression identifying field to be compared
System.Int64	value	Value to compare against the field

Returns

Type	Description
FilterExpression	EqualToExpression for this field and the specified value

Equality(FieldExpression, String)

Creates a new EqualToExpression representing a comparison of the field represented by this expression to the specified value.

Declaration

public static FilterExpression operator ==(FieldExpression field, string value)

Parameters

Type	Name	Description
FieldExpression	field	Expression identifying field to be compared
System.String	value	Value to compare against the field

Returns

Type	Description
FilterExpression	EqualToExpression for this field and the specified value

GreaterThan(FieldExpression, DateTime)

Creates a new GreaterThanExpression representing a comparison of the field represented by this expression to the specified value.

Declaration

public static FilterExpression operator>(FieldExpression field, DateTime value)

Parameters

Type	Name	Description
FieldExpression	field	Expression identifying field to be compared
System.DateTime	value	Value to compare against the field

Returns

Type	Description
FilterExpression	GreaterThanExpression for this field and the specified value

GreaterThan(FieldExpression, Double)

Creates a new GreaterThanExpression representing a comparison of the field represented by this expression to the specified value.

Declaration

public static FilterExpression operator>(FieldExpression field, double value)

Parameters

Type	Name	Description
FieldExpression	field	Expression identifying field to be compared
System.Double	value	Value to compare against the field

Returns

Type	Description
FilterExpression	GreaterThanExpression for this field and the specified value

GreaterThan(FieldExpression, Int64)

Creates a new GreaterThanExpression representing a comparison of the field represented by this expression to the specified value.

Declaration

public static FilterExpression operator>(FieldExpression field, long value)

Parameters

Type	Name	Description
FieldExpression	field	Expression identifying field to be compared
System.Int64	value	Value to compare against the field

Returns

Type	Description
FilterExpression	GreaterThanExpression for this field and the specified value

GreaterThanOrEqual(FieldExpression, DateTime)

Creates a new GreaterThanOrEqualTo representing a comparison of the field represented by this expression to the specified value.

Declaration

public static FilterExpression operator >=(FieldExpression field, DateTime value)

Parameters

Type	Name	Description
FieldExpression	field	Expression identifying field to be compared
System.DateTime	value	Value to compare against the field

Returns

Type	Description
FilterExpression	GreaterThanOrEqualTo for this field and the specified value

GreaterThanOrEqual(FieldExpression, Double)

Creates a new GreaterThanOrEqualTo representing a comparison of the field represented by this expression to the specified value.

Declaration

public static FilterExpression operator >=(FieldExpression field, double value)

Parameters

Type	Name	Description
FieldExpression	field	Expression identifying field to be compared
System.Double	value	Value to compare against the field

Returns

Type	Description
FilterExpression	GreaterThanOrEqualTo for this field and the specified value

GreaterThanOrEqual(FieldExpression, Int64)

Creates a new GreaterThanOrEqualTo representing a comparison of the field represented by this expression to the specified value.

Declaration

public static FilterExpression operator >=(FieldExpression field, long value)

Parameters

Type	Name	Description
FieldExpression	field	Expression identifying field to be compared
System.Int64	value	Value to compare against the field

Returns

Type	Description
FilterExpression	GreaterThanOrEqualTo for this field and the specified value

Inequality(FieldExpression, Boolean)

The inequality operator is not supported.

Declaration

public static FilterExpression operator !=(FieldExpression field, bool value)

Parameters

Type	Name	Description
FieldExpression	field
System.Boolean	value

Returns

Type	Description
FilterExpression

Inequality(FieldExpression, DateTime)

The inequality operator is not supported.

Declaration

public static FilterExpression operator !=(FieldExpression field, DateTime value)

Parameters

Type	Name	Description
FieldExpression	field
System.DateTime	value

Returns

Type	Description
FilterExpression

Inequality(FieldExpression, Double)

The inequality operator is not supported.

Declaration

public static FilterExpression operator !=(FieldExpression field, double value)

Parameters

Type	Name	Description
FieldExpression	field
System.Double	value

Returns

Type	Description
FilterExpression

Inequality(FieldExpression, Int64)

The inequality operator is not supported.

Declaration

public static FilterExpression operator !=(FieldExpression field, long value)

Parameters

Type	Name	Description
FieldExpression	field
System.Int64	value

Returns

Type	Description
FilterExpression

Inequality(FieldExpression, String)

The inequality operator is not supported.

Declaration

public static FilterExpression operator !=(FieldExpression field, string value)

Parameters

Type	Name	Description
FieldExpression	field
System.String	value

Returns

Type	Description
FilterExpression

LessThan(FieldExpression, DateTime)

Creates a new LessThan representing a comparison of the field represented by this expression to the specified value.

Declaration

public static FilterExpression operator <(FieldExpression field, DateTime value)

Parameters

Type	Name	Description
FieldExpression	field	Expression identifying field to be compared
System.DateTime	value	Value to compare against the field

Returns

Type	Description
FilterExpression	LessThan for this field and the specified value

LessThan(FieldExpression, Double)

Creates a new LessThan representing a comparison of the field represented by this expression to the specified value.

Declaration

public static FilterExpression operator <(FieldExpression field, double value)

Parameters

Type	Name	Description
FieldExpression	field	Expression identifying field to be compared
System.Double	value	Value to compare against the field

Returns

Type	Description
FilterExpression	LessThan for this field and the specified value

LessThan(FieldExpression, Int64)

Creates a new LessThan representing a comparison of the field represented by this expression to the specified value.

Declaration

public static FilterExpression operator <(FieldExpression field, long value)

Parameters

Type	Name	Description
FieldExpression	field	Expression identifying field to be compared
System.Int64	value	Value to compare against the field

Returns

Type	Description
FilterExpression	LessThan for this field and the specified value

LessThanOrEqual(FieldExpression, DateTime)

Creates a new LessThanOrEqualToExpression representing a comparison of the field represented by this expression to the specified value.

Declaration

public static FilterExpression operator <=(FieldExpression field, DateTime value)

Parameters

Type	Name	Description
FieldExpression	field	Expression identifying field to be compared
System.DateTime	value	Value to compare against the field

Returns

Type	Description
FilterExpression	LessThan for this field and the specified value

LessThanOrEqual(FieldExpression, Double)

Creates a new LessThanOrEqualToExpression representing a comparison of the field represented by this expression to the specified value.

Declaration

public static FilterExpression operator <=(FieldExpression field, double value)

Parameters

Type	Name	Description
FieldExpression	field	Expression identifying field to be compared
System.Double	value	Value to compare against the field

Returns

Type	Description
FilterExpression	LessThan for this field and the specified value

LessThanOrEqual(FieldExpression, Int64)

Creates a new LessThanOrEqualToExpression representing a comparison of the field represented by this expression to the specified value.

Declaration

public static FilterExpression operator <=(FieldExpression field, long value)

Parameters

Type	Name	Description
FieldExpression	field	Expression identifying field to be compared
System.Int64	value	Value to compare against the field

Returns

Type	Description
FilterExpression	LessThan for this field and the specified value

Extension Methods

FieldExpressionExtensions.EqualTo(FieldExpression, String)

FieldExpressionExtensions.EqualTo(FieldExpression, Boolean)

FieldExpressionExtensions.EqualTo(FieldExpression, Int64)

FieldExpressionExtensions.EqualTo(FieldExpression, Double)

FieldExpressionExtensions.EqualTo(FieldExpression, DateTime)

FieldExpressionExtensions.Contains(FieldExpression, String)

FieldExpressionExtensions.Contains(FieldExpression, Boolean)

FieldExpressionExtensions.Contains(FieldExpression, Int64)

FieldExpressionExtensions.Contains(FieldExpression, Double)

FieldExpressionExtensions.Contains(FieldExpression, DateTime)

FieldExpressionExtensions.Any(FieldExpression, IEnumerable<String>)

FieldExpressionExtensions.Any(FieldExpression, IEnumerable<Int64>)

FieldExpressionExtensions.Any(FieldExpression, IEnumerable<Double>)

FieldExpressionExtensions.Any(FieldExpression, IEnumerable<DateTime>)

FieldExpressionExtensions.Any(FieldExpression, IEnumerable<Boolean>)

FieldExpressionExtensions.GreaterThan(FieldExpression, Int64)

FieldExpressionExtensions.GreaterThan(FieldExpression, Double)

FieldExpressionExtensions.GreaterThan(FieldExpression, DateTime)

FieldExpressionExtensions.GreaterThanOrEqualTo(FieldExpression, Int64)

FieldExpressionExtensions.GreaterThanOrEqualTo(FieldExpression, Double)

FieldExpressionExtensions.GreaterThanOrEqualTo(FieldExpression, DateTime)

FieldExpressionExtensions.LessThan(FieldExpression, Int64)

FieldExpressionExtensions.LessThan(FieldExpression, Double)

FieldExpressionExtensions.LessThan(FieldExpression, DateTime)

FieldExpressionExtensions.LessThanOrEqualTo(FieldExpression, Int64)

FieldExpressionExtensions.LessThanOrEqualTo(FieldExpression, Double)

FieldExpressionExtensions.LessThanOrEqualTo(FieldExpression, DateTime)