CodeActivity<TResult> Class
An abstract class for creating a custom activity with imperative behavior defined in the Execute method, giving access to variable and argument resolution and extensions.
Assembly: System.Activities (in System.Activities.dll)
System.Activities::Activity
System.Activities::ActivityWithResult
System.Activities::Activity<TResult>
System.Activities::CodeActivity<TResult>
Microsoft.CSharp.Activities::CSharpReference<TResult>
Microsoft.CSharp.Activities::CSharpValue<TResult>
Microsoft.VisualBasic.Activities::VisualBasicReference<TResult>
Microsoft.VisualBasic.Activities::VisualBasicValue<TResult>
System.Activities.Expressions::Add<TLeft, TRight, TResult>
System.Activities.Expressions::And<TLeft, TRight, TResult>
System.Activities.Expressions::ArrayItemReference<TItem>
System.Activities.Expressions::ArrayItemValue<TItem>
System.Activities.Expressions::As<TOperand, TResult>
System.Activities.Expressions::Cast<TOperand, TResult>
System.Activities.Expressions::Divide<TLeft, TRight, TResult>
System.Activities.Expressions::EnvironmentLocationReference<T>
System.Activities.Expressions::EnvironmentLocationValue<T>
System.Activities.Expressions::Equal<TLeft, TRight, TResult>
System.Activities.Expressions::FieldReference<TOperand, TResult>
System.Activities.Expressions::FieldValue<TOperand, TResult>
System.Activities.Expressions::GreaterThan<TLeft, TRight, TResult>
System.Activities.Expressions::GreaterThanOrEqual<TLeft, TRight, TResult>
System.Activities.Expressions::IndexerReference<TOperand, TItem>
System.Activities.Expressions::LambdaReference<T>
System.Activities.Expressions::LambdaValue<TResult>
System.Activities.Expressions::LessThan<TLeft, TRight, TResult>
System.Activities.Expressions::LessThanOrEqual<TLeft, TRight, TResult>
System.Activities.Expressions::Literal<T>
System.Activities.Expressions::MultidimensionalArrayItemReference<TItem>
System.Activities.Expressions::Multiply<TLeft, TRight, TResult>
System.Activities.Expressions::New<TResult>
System.Activities.Expressions::NewArray<TResult>
System.Activities.Expressions::Not<TOperand, TResult>
System.Activities.Expressions::NotEqual<TLeft, TRight, TResult>
System.Activities.Expressions::Or<TLeft, TRight, TResult>
System.Activities.Expressions::PropertyReference<TOperand, TResult>
System.Activities.Expressions::PropertyValue<TOperand, TResult>
System.Activities.Expressions::Subtract<TLeft, TRight, TResult>
System.Activities.Expressions::ValueTypeFieldReference<TOperand, TResult>
System.Activities.Expressions::ValueTypeIndexerReference<TOperand, TItem>
System.Activities.Expressions::ValueTypePropertyReference<TOperand, TResult>
System.Activities.Statements::ExistsInCollection<T>
System.Activities.Statements::RemoveFromCollection<T>
System.Activities.Validation::GetChildSubtree
System.Activities.Validation::GetParentChain
System.Activities.Validation::GetWorkflowTree
| Name | Description | |
|---|---|---|
![]() | CodeActivity<TResult>() | When implemented in a derived class, creates an instance of the derived class. |
| Name | Description | |
|---|---|---|
![]() | CacheId | Gets the identifier of the cache that is unique within the scope of the workflow definition.(Inherited from Activity.) |
![]() | Constraints | Gets a collection of Constraint activities that can be configured to provide validation for the Activity.(Inherited from Activity.) |
![]() | 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 | Not supported.(Overrides Activity::Implementation.) |
![]() | ImplementationVersion | Gets or sets the implementation version of the activity.(Overrides Activity::ImplementationVersion.) |
![]() | Result | Gets or sets the result argument for the Activity<TResult>.(Inherited from Activity<TResult>.) |
![]() | ResultType | When implemented in a derived class, gets the type of an activity OutArgument.(Inherited from ActivityWithResult.) |
| Name | Description | |
|---|---|---|
![]() | CacheMetadata(ActivityMetadata) | Not implemented. Use CacheMetadata instead.(Overrides Activity::CacheMetadata(ActivityMetadata).) |
![]() | CacheMetadata(CodeActivityMetadata) | Creates and validates a description of the activity’s arguments, variables, child activities, and activity delegates. |
![]() | Equals(Object^) | Determines whether the specified object is equal to the current object.(Inherited from Object.) |
![]() | Execute(CodeActivityContext^) | When implemented in a derived class, performs the execution of the activity. |
![]() | 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 the default hash function. (Inherited from Object.) |
![]() | GetType() | |
![]() | MemberwiseClone() | |
![]() | OnCreateDynamicUpdateMap(UpdateMapMetadata^, Activity^) | Raises an event when creating a map for the dynamic update.(Overrides Activity::OnCreateDynamicUpdateMap(UpdateMapMetadata^, Activity^).) |
![]() | 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.) |
Derived classes can define a result value of the type specified in the type specifier of the class.
The following example shows how to derive a class from CodeActivity<TResult>.
public sealed class Add : CodeActivity<int> { public InArgument<int> X { get; set; } public InArgument<int> Y { get; set; } protected override int Execute(CodeActivityContext context) { int x = X.Get(context); int y = Y.Get(context); return x + y; } }
Available since 4.0
Any public static ( Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.



