Class MemberSelectorBuilder

Represents an expression builder that defines a simple selector on the elements of an observable sequence by mapping specified member values into the output data type.

The MemberSelector operator is used to quickly extract member fields and properties out of the elements of the source sequence. Multiple members can be specified using a comma-separated list in the Selector property, in which case the output type will be a tuple of all selected member types.

The TypeMapping property can be used to specify which type conversion to use when chaining the selected members into downstream operators.

Inheritance
Object
ExpressionBuilder
SingleArgumentExpressionBuilder
SelectBuilder
MemberSelectorBuilder
Implements
Inherited Members
Namespace: Bonsai.Expressions
Assembly: Bonsai.Core.dll
Syntax
public class MemberSelectorBuilder : SelectBuilder, IExpressionBuilder, INamedElement

Properties

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Selector

Gets or sets a string used to select the input element members that will be projected as output of the sequence.

Declaration
public string Selector { get; set; }
Property Value
Type Description
String
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TypeMapping

Gets or sets an optional type mapping specifying the data type which the selected properties will be projected into.

Declaration
[Externalizable(false)]
[TypeConverter(typeof(TypeMappingConverter))]
public TypeMapping TypeMapping { get; set; }
Property Value
Type Description
TypeMapping

Methods

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BuildSelector(Expression)

Returns the expression that maps the specified input parameter to the selector result.

Declaration
protected override Expression BuildSelector(Expression expression)
Parameters
Type Name Description
Expression expression

The input parameter to the selector.
Returns
Type Description
Expression

The Expression that maps the input parameter to the selector result.
Overrides

Explicit Interface Implementations

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INamedElement.Name

Declaration
string INamedElement.Name { get; }
Returns
Type Description
String

Implements

Extension Methods