Class MemberSelectorBuilder

Namespace

Bonsai.Expressions

Assembly

Bonsai.Core.dll

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.

public class MemberSelectorBuilder : SelectBuilder, IExpressionBuilder, INamedElement

Inheritance

object

ExpressionBuilder

SingleArgumentExpressionBuilder

SelectBuilder

MemberSelectorBuilder

Implements

IExpressionBuilder

INamedElement

Inherited Members

SelectBuilder.Build(IEnumerable<Expression>)

SingleArgumentExpressionBuilder.ArgumentRange

ExpressionBuilder.ToString()

ExpressionBuilder.Unwrap(ExpressionBuilder)

ExpressionBuilder.GetWorkflowElement(ExpressionBuilder)

ExpressionBuilder.GetVisualizerElement(ExpressionBuilder)

ExpressionBuilder.GetVisualizerMappings(ExpressionBuilder)

ExpressionBuilder.FromWorkflowElement(object, ElementCategory)

ExpressionBuilder.GetElementDisplayName(Type)

ExpressionBuilder.GetElementDisplayName(object)

object.Equals(object)

object.Equals(object, object)

object.ReferenceEquals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

Extension Methods

ExpressionBuilderGraphExtensions.AsInspectBuilder(ExpressionBuilder)

ExpressionBuilderGraphExtensions.Build(ExpressionBuilder, params Expression[])

ExpressionBuilderGraphExtensions.IsBuildDependency(ExpressionBuilder)

Properties

Selector

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

public string Selector { get; set; }

Property Value

string

TypeMapping

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

[Externalizable(false)]
public TypeMapping TypeMapping { get; set; }

Property Value

TypeMapping

Methods

BuildSelector(Expression)

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

protected override Expression BuildSelector(Expression expression)

Parameters

expression Expression

The input parameter to the selector.

Returns

Expression

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