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DynamicActivity Class
Visual Studio 2010
Provides an object model that allows you to construct activities dynamically that interface with the WF designer and runtime using ICustomTypeDescriptor.
Assembly: System.Activities (in System.Activities.dll)
The DynamicActivity type exposes the following members.
| Name | Description | |
|---|---|---|
![]() | Attributes | Gets the collection of attributes of the dynamically generated activity. |
![]() | CacheId | Gets the identifier of the cache that is unique within the scope of the workflow definition. (Inherited from Activity.) |
![]() | Constraints | Returns a collection of Constraint activities that are configured to provide validation for the DynamicActivity. |
![]() | DisplayName | Gets or sets an optional friendly name that is used for debugging, validation, exception handling, and tracking. (Inherited from Activity.) |
![]() | Id | Gets an identifier that is unique in the scope of the workflow definition. (Inherited from Activity.) |
![]() | Implementation | Gets or sets the execution logic of the activity. |
![]() | Name | The name to be displayed for the activity in the workflow designer. |
![]() | Properties | Gets the collection of properties that map to the arguments of the dynamically generated activity. |
| Name | Description | |
|---|---|---|
![]() | CacheMetadata | Creates and validates a description of the activity’s arguments, variables, child activities, and activity delegates. (Inherited from Activity.) |
![]() | Equals(Object) | Determines whether the specified Object is equal to the current Object. (Inherited from Object.) |
![]() | Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.) |
![]() | GetHashCode | Serves as a hash function for a particular type. (Inherited from Object.) |
![]() | GetType | Gets the Type of the current instance. (Inherited from Object.) |
![]() | MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
![]() | ShouldSerializeDisplayName | Indicates whether the DisplayName property should be serialized. (Inherited from Activity.) |
![]() | ToString | Returns a String that contains the Id and DisplayName of the Activity. (Inherited from Activity.) |
| Name | Description | |
|---|---|---|
![]() ![]() | ICustomTypeDescriptor::GetAttributes | Returns a collection of attributes of the dynamic activity. |
![]() ![]() | ICustomTypeDescriptor::GetClassName | Returns the class name of the dynamic activity. |
![]() ![]() | ICustomTypeDescriptor::GetComponentName | Returns the component name of the dynamic activity. |
![]() ![]() | ICustomTypeDescriptor::GetConverter | Returns a type converter for the dynamic activity. |
![]() ![]() | ICustomTypeDescriptor::GetDefaultEvent | Returns the default event for the dynamic activity. |
![]() ![]() | ICustomTypeDescriptor::GetDefaultProperty | Returns the default property for the dynamic activity. |
![]() ![]() | ICustomTypeDescriptor::GetEditor | Returns an editor with the specified base type. |
![]() ![]() | ICustomTypeDescriptor::GetEvents() | Returns the collection of events of the dynamic activity. |
![]() ![]() | ICustomTypeDescriptor::GetEvents(array<Attribute>) | Returns the collection of events of the dynamic activity using a specified array of attributes as a filter. |
![]() ![]() | ICustomTypeDescriptor::GetProperties() | Returns the collection of properties of the dynamic activity. |
![]() ![]() | ICustomTypeDescriptor::GetProperties(array<Attribute>) | Returns the collection of properties of the dynamic activity using a specified array of attributes as a filter. |
![]() ![]() | ICustomTypeDescriptor::GetPropertyOwner | Returns this instance of the DynamicActivity class. |
The following example shows how to create a DynamicActivity.
// Variables var iterationVariable = new DelegateInArgument<int>() { Name = "iterationVariable" }; var accumulator = new Variable<int>() { Default = 0, Name = "accumulator" }; // Define the Input and Output arguments that the DynamicActivity binds to var numbers = new InArgument<List<int>>(); var average = new OutArgument<double>(); var result = new Variable<double>() { Name = "result" }; return new DynamicActivity() { DisplayName = "Find average", Properties = { // Input argument new DynamicActivityProperty { Name = "Numbers", Type = typeof(InArgument<List<int>>), Value = numbers }, // Output argument new DynamicActivityProperty { Name = "Average", Type = typeof(OutArgument<double>), Value = average } }, Implementation = () => new Sequence { Variables = { result, accumulator }, Activities = { new ForEach<int> { Values = new ArgumentValue<IEnumerable<int>> { ArgumentName = "Numbers" }, Body = new ActivityAction<int> { Argument = iterationVariable, Handler = new Assign<int> { To = accumulator, Value = new InArgument<int>(env => iterationVariable.Get(env) + accumulator.Get(env)) } } }, // Calculate the average and assign to the output argument. new Assign<double> { To = new ArgumentReference<double> { ArgumentName = "Average" }, Value = new InArgument<double>(env => accumulator.Get(env) / numbers.Get(env).Count<int>()) }, } }
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.
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