CodeActivity Class

.NET Framework (current version)
 

An abstract class for creating a custom activity with imperative behavior defined with the Execute method, which gives access to variable and argument resolution and extensions.

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


public abstract class CodeActivity : Activity

NameDescription
System_CAPS_protmethodCodeActivity()

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

NameDescription
System_CAPS_protpropertyCacheId

Gets the identifier of the cache that is unique within the scope of the workflow definition.(Inherited from Activity.)

System_CAPS_protpropertyConstraints

Gets a collection of Constraint activities that can be configured to provide validation for the Activity.(Inherited from Activity.)

System_CAPS_pubpropertyDisplayName

Gets or sets an optional friendly name that is used for debugging, validation, exception handling, and tracking.(Inherited from Activity.)

System_CAPS_pubpropertyId

Gets an identifier that is unique in the scope of the workflow definition.(Inherited from Activity.)

System_CAPS_protpropertyImplementation

Not supported.(Overrides Activity.Implementation.)

System_CAPS_protpropertyImplementationVersion

Gets or sets the implementation version of the activity.(Overrides Activity.ImplementationVersion.)

NameDescription
System_CAPS_protmethodCacheMetadata(ActivityMetadata)

Not implemented. Use CacheMetadata instead.(Overrides Activity.CacheMetadata(ActivityMetadata).)

System_CAPS_protmethodCacheMetadata(CodeActivityMetadata)

Creates and validates a description of the activity’s arguments, variables, child activities, and activity delegates.

System_CAPS_pubmethodEquals(Object)

Determines whether the specified object is equal to the current object.(Inherited from Object.)

System_CAPS_protmethodExecute(CodeActivityContext)

When implemented in a derived class, performs the execution of the activity.

System_CAPS_protmethodFinalize()

Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.(Inherited from Object.)

System_CAPS_pubmethodGetHashCode()

Serves as the default hash function. (Inherited from Object.)

System_CAPS_pubmethodGetType()

Gets the Type of the current instance.(Inherited from Object.)

System_CAPS_protmethodMemberwiseClone()

Creates a shallow copy of the current Object.(Inherited from Object.)

System_CAPS_protmethodOnCreateDynamicUpdateMap(UpdateMapMetadata, Activity)

Raises an event when creating a map for the dynamic update.(Overrides Activity.OnCreateDynamicUpdateMap(UpdateMapMetadata, Activity).)

System_CAPS_pubmethodShouldSerializeDisplayName()

Indicates whether the DisplayName property should be serialized.(Inherited from Activity.)

System_CAPS_pubmethodToString()

Returns a String that contains the Id and DisplayName of the Activity.(Inherited from Activity.)

The following example shows how to implement a CodeActivity-derived activity.

public sealed class MessageBox : CodeActivity
{
    public InArgument<string> Text{ get; set; }

    protected override void Execute(CodeActivityContext context)
    {
        System.Windows.Forms.MessageBox.Show(this.Text.Get(context));
    }
}

.NET Framework
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.

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