InvokeMethod Class (System.Activities.Statements)

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Classic
Lightweight
ScriptFree
.NET Framework Class Library
InvokeMethod Class

Calls a public method of a specified object or type.

Inheritance Hierarchy
System.Object
  System.Activities.Activity
    System.Activities.AsyncCodeActivity
      System.Activities.Statements.InvokeMethod

Namespace:  System.Activities.Statements
Assembly:  System.Activities (in System.Activities.dll)
Syntax
Visual Basic
<ContentPropertyAttribute("Parameters")> _
Public NotInheritable Class InvokeMethod _
	Inherits AsyncCodeActivity
C#
[ContentPropertyAttribute("Parameters")]
public sealed class InvokeMethod : AsyncCodeActivity
Visual C++
[ContentPropertyAttribute(L"Parameters")]
public ref class InvokeMethod sealed : public AsyncCodeActivity
F#
[<Sealed>]
[<ContentPropertyAttribute("Parameters")>]
type InvokeMethod =  
    class
        inherit AsyncCodeActivity
    end

The InvokeMethod type exposes the following members.

Constructors
  Name Description
Public method InvokeMethod Creates a new instance of the InvokeMethod class.
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Properties
  Name Description
Protected property CacheId Gets the identifier of the cache that is unique within the scope of the workflow definition. (Inherited from Activity.)
Protected property Constraints Gets a collection of Constraint activities that can be configured to provide validation for the Activity. (Inherited from Activity.)
Public property DisplayName Gets or sets an optional friendly name that is used for debugging, validation, exception handling, and tracking. (Inherited from Activity.)
Public property GenericTypeArguments The generic type arguments of the contained method.
Public property Id Gets an identifier that is unique in the scope of the workflow definition. (Inherited from Activity.)
Protected property Implementation Gets null or throws an error when there is an attempt to set the value of this property. (Inherited from AsyncCodeActivity.)
Public property MethodName The name of the method to be invoked when the activity executes.
Public property Parameters The parameter collection of the method to be invoked.
Public property Result The return value of the method operation.
Public property RunAsynchronously Gets or sets a value that indicates whether the activity’s method is invoked asynchronously.
Public property TargetObject The object that contains the method to execute.
Public property TargetType The type of the TargetObject.
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Methods
  Name Description
Protected method BeginExecute When 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 method CacheMetadata(ActivityMetadata) Not implemented. Use CacheMetadata(CodeActivityMetadata) instead. (Inherited from AsyncCodeActivity.)
Protected method CacheMetadata(CodeActivityMetadata) Serves as a virtual method and converts information obtained by cache reflection into arguments for an asynchronous activity. (Inherited from AsyncCodeActivity.)
Protected method Cancel When 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 method EndExecute When 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 method Equals(Object) Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
Protected method Finalize Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public method GetHashCode Serves as a hash function for a particular type. (Inherited from Object.)
Public method GetType Gets the Type of the current instance. (Inherited from Object.)
Protected method MemberwiseClone Creates a shallow copy of the current Object. (Inherited from Object.)
Public method ShouldSerializeDisplayName Indicates whether the DisplayName property should be serialized. (Inherited from Activity.)
Public method ToString Returns a String that contains the Id and DisplayName of the Activity. (Inherited from Activity.)
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Examples

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

C#

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")
    }
},
Version Information

.NET Framework

Supported in: 4

.NET Framework Client Profile

Supported in: 4
Platforms

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

Reference

System.Activities.Statements Namespace