Class ExpressionPropertyDescriptor

Class that illustrates the expression field support along with filtering in PivotEngine.

Inheritance

System.Object

ExpressionPropertyDescriptor

Namespace: Syncfusion.XlsIO.Implementation.PivotAnalysis

Assembly: Syncfusion.XlsIO.Portable.dll

Syntax

public class ExpressionPropertyDescriptor : PropertyDescriptor

Constructors

ExpressionPropertyDescriptor(String, Attribute[], String, String, FilterHelper)

A constructor that initializes the attributes of "ExpressionPropertyDescriptor" object.

Declaration

public ExpressionPropertyDescriptor(string name, Attribute[] attributes, string expression, string format, FilterHelper helper)

Parameters

Type	Name	Description
System.String	name	Name of the expression field.
System.Attribute[]	attributes	Attributes.
System.String	expression	Expression.
System.String	format	Format.
FilterHelper	helper	An object that holds attributes to compute filter values and expressions.

Properties

ComponentType

When overridden in a derived class, gets the type of the component this property is bound to.

Declaration

public override Type ComponentType { get; }

Property Value

Type
System.Type

Exp

Gets or sets the logical expression for filtering.

Declaration

public FilterExpression Exp { get; set; }

Property Value

Type
FilterExpression

Expression

Gets or sets the expression.

Declaration

public string Expression { get; set; }

Property Value

Type
System.String

Format

Gets or sets a format associated with the value of this expression.

Declaration

public string Format { get; set; }

Property Value

Type
System.String

IsReadOnly

Checks whether the data is read-only.

Declaration

public override bool IsReadOnly { get; }

Property Value

Type
System.Boolean

PropertyType

Returns the object datatype.

Declaration

public override Type PropertyType { get; }

Property Value

Type
System.Type

Methods

CanResetValue(Object)

When overridden in a derived class, returns whether re-setting an object changes its value.

Declaration

public override bool CanResetValue(object component)

Parameters

Type	Name	Description
System.Object	component	The component to test re-setting capability.

Returns

Type	Description
System.Boolean	Retuens true if re-setting the component changes its value; otherwise, false.

GetValue(Object)

Gets the value of the concerned data and returns the values based on the format associated with it.

Declaration

public override object GetValue(object component)

Parameters

Type	Name	Description
System.Object	component

Returns

Type
System.Object

ResetValue(Object)

Resets the value based on expression.

Declaration

public override void ResetValue(object component)

Parameters

Type	Name	Description
System.Object	component

SetValue(Object, Object)

When overridden in a derived class, sets the value of the component to a different value.

Declaration

public override void SetValue(object component, object value)

Parameters

Type	Name	Description
System.Object	component	The component with the property value that is to be set.
System.Object	value	The new value.

ShouldSerializeValue(Object)

When overridden in a derived class, determines a value indicating whether the value of this property needs to be persisted.

Declaration

public override bool ShouldSerializeValue(object component)

Parameters

Type	Name	Description
System.Object	component	The component with the property to be examined for persistence.

Returns

Type	Description
System.Boolean	Returns true if the property should be persisted; otherwise, false.