Class TakeWhile
Represents an expression builder which returns elements from an observable sequence as long as the condition specified by the encapsulated workflow is true.
The nested workflow specifying the condition must return a sequence of type bool. This nested sequence may be synchronous or asynchronous with respect to notifications from the source sequence.
After each element is emitted by the source sequence, the latest value from the nested sequence is checked. While the value is true
, TakeWhile
will continue to emit all elements from the source sequence. When the value changes to false
, TakeWhile
will terminate successfully.
[WorkflowElementCategory(ElementCategory.Combinator)]
public class TakeWhile : Condition, IWorkflowExpressionBuilder, INamedElement, IPropertyMappingBuilder, IExpressionBuilder
- Inheritance
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TakeWhile
- Implements
- Inherited Members
- Extension Methods
Constructors
TakeWhile()
Initializes a new instance of the TakeWhile class.
public TakeWhile()
TakeWhile(ExpressionBuilderGraph)
Initializes a new instance of the TakeWhile class with the specified expression builder workflow.
public TakeWhile(ExpressionBuilderGraph workflow)
Parameters
workflow
ExpressionBuilderGraphThe expression builder workflow instance that will be used by this builder to generate the output expression tree.