DynamicActivity Class
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Provides an object model that allows you to construct activities dynamically that interface with the WF designer and runtime using ICustomTypeDescriptor.
public ref class DynamicActivity sealed : System::Activities::Activity, System::ComponentModel::ICustomTypeDescriptor
[System.Windows.Markup.ContentProperty("Implementation")]
public sealed class DynamicActivity : System.Activities.Activity, System.ComponentModel.ICustomTypeDescriptor
[<System.Windows.Markup.ContentProperty("Implementation")>]
type DynamicActivity = class
inherit Activity
interface ICustomTypeDescriptor
Public NotInheritable Class DynamicActivity
Inherits Activity
Implements ICustomTypeDescriptor
- Inheritance
- Attributes
- Implements
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>())
},
}
}
Dynamic |
Creates a new instance of the DynamicActivity class. |
Attributes |
Gets the collection of attributes of the dynamically generated activity. |
Cache |
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. |
Display |
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. |
Implementation |
Gets or sets the implementation version of the activity. |
Implementation |
Gets or sets the version of the implementation used. (Inherited from 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. |
Cache |
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) |
Get |
Serves as the default hash function. (Inherited from Object) |
Get |
Gets the Type of the current instance. (Inherited from Object) |
Memberwise |
Creates a shallow copy of the current Object. (Inherited from Object) |
On |
Raises an event when creating dynamic update map. (Inherited from Activity) |
Should |
Indicates whether the DisplayName property should be serialized. (Inherited from Activity) |
To |
Returns a String that contains the Id and DisplayName of the Activity. (Inherited from Activity) |
ICustom |
Returns a collection of attributes of the dynamic activity. |
ICustom |
Returns the class name of the dynamic activity. |
ICustom |
Returns the component name of the dynamic activity. |
ICustom |
Returns a type converter for the dynamic activity. |
ICustom |
Returns the default event for the dynamic activity. |
ICustom |
Returns the default property for the dynamic activity. |
ICustom |
Returns an editor with the specified base type. |
ICustom |
Returns the collection of events of the dynamic activity. |
ICustom |
Returns the collection of events of the dynamic activity using a specified array of attributes as a filter. |
ICustom |
Returns the collection of properties of the dynamic activity. |
ICustom |
Returns the collection of properties of the dynamic activity using a specified array of attributes as a filter. |
ICustom |
Returns this instance of the DynamicActivity class. |
Product | Versions |
---|---|
.NET Framework | 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
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