CodeActivity Class

Definition

Namespace:

System.Activities

Assembly:

System.Activities.dll

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

public ref class CodeActivity abstract : System::Activities::Activity

public abstract class CodeActivity : System.Activities.Activity

type CodeActivity = class
    inherit Activity

Public MustInherit Class CodeActivity
Inherits Activity

Inheritance

Object

Activity

CodeActivity

Derived

System.Activities.Statements.AddToCollection<T>

System.Activities.Statements.Assign

System.Activities.Statements.Assign<T>

System.Activities.Statements.ClearCollection<T>

System.Activities.Statements.Throw

System.Activities.Statements.WriteLine

Examples

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));
    }
}

Constructors

CodeActivity()

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.

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.
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)