CodeActivity<TResult> Class

Reference

Definition

Namespace:: System.Activities

Assembly:: System.Activities.dll

Important

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An abstract class for creating a custom activity with imperative behavior defined in the Execute(CodeActivityContext) method, giving access to variable and argument resolution and extensions.

generic <typename TResult>
public ref class CodeActivity abstract : System::Activities::Activity<TResult>

public abstract class CodeActivity<TResult> : System.Activities.Activity<TResult>

type CodeActivity<'Result> = class
    inherit Activity<'Result>

Public MustInherit Class CodeActivity(Of TResult)
Inherits Activity(Of TResult)

Type Parameters

TResult

The result returned by the activity.

Inheritance: Object

Activity

ActivityWithResult

Activity<TResult>
CodeActivity<TResult>

Derived: 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>

More…

Examples

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;
    }
}

Remarks

Derived classes can define a result value of the type specified in the type specifier of the class.

Constructors

CodeActivity<TResult>()

When implemented in a derived class, creates an instance of the derived class.

Properties

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.
ImplementationVersion	Gets or sets the implementation version of the activity.
ImplementationVersion	Gets or sets the version of the implementation used. (Inherited from Activity)
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)

Methods

CacheMetadata(ActivityMetadata)	Not implemented. Use CacheMetadata(CodeActivityMetadata) instead.
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.
GetHashCode()	Serves as the default hash function. (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)
OnCreateDynamicUpdateMap(UpdateMapMetadata, Activity)	Raises an event when creating a map for the dynamic update.
OnCreateDynamicUpdateMap(UpdateMapMetadata, Activity)	Raises an event when creating dynamic update map. (Inherited from 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)

Applies to

Del via