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RuleInvokeAttribute Class

Indicates that a method is invoked by a condition. This class cannot be inherited.

System.Object
  System.Attribute
    System.Workflow.Activities.Rules.RuleAttribute
      System.Workflow.Activities.Rules.RuleInvokeAttribute

Namespace:  System.Workflow.Activities.Rules
Assembly:  System.Workflow.Activities (in System.Workflow.Activities.dll)

[AttributeUsageAttribute(AttributeTargets.Method|AttributeTargets.Property, AllowMultiple = true)]
public sealed class RuleInvokeAttribute : RuleAttribute

The RuleInvokeAttribute type exposes the following members.

  NameDescription
Public methodRuleInvokeAttributeInitializes a new instance of the RuleInvokeAttribute class.
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  NameDescription
Public propertyMethodInvokedGets the method invoked by the condition.
Public propertyTypeIdWhen implemented in a derived class, gets a unique identifier for this Attribute. (Inherited from Attribute.)
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  NameDescription
Public methodEqualsInfrastructure. Returns a value that indicates whether this instance is equal to a specified object. (Inherited from Attribute.)
Public methodGetHashCodeReturns the hash code for this instance. (Inherited from Attribute.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodIsDefaultAttributeWhen overridden in a derived class, indicates whether the value of this instance is the default value for the derived class. (Inherited from Attribute.)
Public methodMatchWhen overridden in a derived class, returns a value that indicates whether this instance equals a specified object. (Inherited from Attribute.)
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)
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  NameDescription
Explicit interface implemetationPrivate method_Attribute.GetIDsOfNamesMaps a set of names to a corresponding set of dispatch identifiers. (Inherited from Attribute.)
Explicit interface implemetationPrivate method_Attribute.GetTypeInfoRetrieves the type information for an object, which can be used to get the type information for an interface. (Inherited from Attribute.)
Explicit interface implemetationPrivate method_Attribute.GetTypeInfoCountRetrieves the number of type information interfaces that an object provides (either 0 or 1). (Inherited from Attribute.)
Explicit interface implemetationPrivate method_Attribute.InvokeProvides access to properties and methods exposed by an object. (Inherited from Attribute.)
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This attribute is used to support a forward chaining model that will cause the reevaluation of rules based on state change. The RuleReadAttribute, RuleInvokeAttribute, and RuleWriteAttribute classes each indicate the properties used to read a condition, write an action, and invoke a method. These attributes enable the workflow to only reevaluate rules that will change the final output.

The following code example demonstrates proper usage of the RuleInvokeAttribute.

[RuleInvokeAttribute("UpdateAttributeValue")]

bool DoSomething()
{
    return attributevalue();
}

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
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