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InvokeMethod Class

Calls a public method of a specified object or type.


Namespace:  System.Activities.Statements
Assembly:  System.Activities (in System.Activities.dll)

<ContentPropertyAttribute("Parameters")> _
Public NotInheritable Class InvokeMethod _
	Inherits AsyncCodeActivity

The InvokeMethod type exposes the following members.

Public methodInvokeMethodCreates a new instance of the InvokeMethod class.

Protected propertyCacheIdGets the identifier of the cache that is unique within the scope of the workflow definition. (Inherited from Activity.)
Protected propertyConstraintsGets a collection of Constraint activities that can be configured to provide validation for the Activity. (Inherited from Activity.)
Public propertyDisplayNameGets or sets an optional friendly name that is used for debugging, validation, exception handling, and tracking. (Inherited from Activity.)
Public propertyGenericTypeArgumentsThe generic type arguments of the contained method.
Public propertyIdGets an identifier that is unique in the scope of the workflow definition. (Inherited from Activity.)
Protected propertyImplementationGets Nothing or throws an error when there is an attempt to set the value of this property. (Inherited from AsyncCodeActivity.)
Public propertyMethodNameThe name of the method to be invoked when the activity executes.
Public propertyParametersThe parameter collection of the method to be invoked.
Public propertyResultThe return value of the method operation.
Public propertyRunAsynchronously Gets or sets a value that indicates whether the activity’s method is invoked asynchronously.
Public propertyTargetObjectThe object that contains the method to execute.
Public propertyTargetTypeThe type of the TargetObject.

Protected methodBeginExecuteWhen implemented in a derived class and using the specified execution context, callback method, and user state, enqueues an asynchronous activity in a run-time workflow. (Inherited from AsyncCodeActivity.)
Protected methodCacheMetadata(ActivityMetadata)Not implemented. Use CacheMetadata(CodeActivityMetadata) instead. (Inherited from AsyncCodeActivity.)
Protected methodCacheMetadata(CodeActivityMetadata)Serves as a virtual method and converts information obtained by cache reflection into arguments for an asynchronous activity. (Inherited from AsyncCodeActivity.)
Protected methodCancelWhen implemented in a derived class and using the specified execution environment information, notifies the workflow runtime that the asynchronous activity operation has reached an early completion. Serves as a virtual method. (Inherited from AsyncCodeActivity.)
Protected methodEndExecuteWhen implemented in a derived class and using the specified execution environment information, notifies the workflow runtime that the associated asynchronous activity operation has completed. (Inherited from AsyncCodeActivity.)
Public methodEquals(Object)Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
Protected methodFinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public methodGetHashCodeServes as a hash function for a particular type. (Inherited from Object.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Protected methodMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodShouldSerializeDisplayNameIndicates whether the DisplayName property should be serialized. (Inherited from Activity.)
Public methodToStringReturns a String that contains the Id and DisplayName of the Activity. (Inherited from Activity.)

The following code sample demonstrates creating an InvokeMethod activity. This example is from the Using the InvokeMethod Activity sample.

new InvokeMethod
    TargetObject = new InArgument<TestClass>(ctx => testClass),
    MethodName = "InstanceMethod",
    Parameters =
        new InArgument<string>("My favorite number is"),
        new InArgument<int>(42),
        new InArgument<string>("first item of the param array"),
        new InArgument<string>("second item of the param array"),
        new InArgument<string>("third item of the param array")

.NET Framework

Supported in: 4

.NET Framework Client Profile

Supported in: 4

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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