ForEach<T> Class

.NET Framework (current version)
 

Executes an activity action once for each value provided in the Values collection.

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

System::Object
  System.Activities::Activity
    System.Activities::NativeActivity
      System.Activities.Statements::ForEach<T>

generic<typename T>
[ContentPropertyAttribute("Body")]
public ref class ForEach sealed : NativeActivity

Type Parameters

T

The type of the values provided in the Values collection.

NameDescription
System_CAPS_pubmethodForEach<T>()

Creates a new instance of the ForEach<T> class.

NameDescription
System_CAPS_pubpropertyBody

The ActivityAction to be executed for each item in the Values collection.

System_CAPS_protpropertyCacheId

Gets the identifier of the cache that is unique within the scope of the workflow definition.(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_protpropertyImplementationVersion

Gets or sets the implementation version of the activity.(Inherited from NativeActivity.)

System_CAPS_pubpropertyValues

The activity’s collection of inputs for the execution of the Body activity action.

NameDescription
System_CAPS_pubmethodEquals(Object^)

Determines whether the specified object is equal to the current object.(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_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.)

T:System.Activities.Statements.ForEach is similar to the keyword foreach, but is implemented as an activity rather than a language statement. Note that unlike foreach in C#, the ForEach<T> activity uses M:System.Collections.IEnumerable`1.GetEnumerator, rather than M:System.Collections.IEnumerator#System#Collections#IEnumerable#GetEnumerator.

The following code sample demonstrates creating a ForEach<T> activity. This example is from the DynamicActivity Creation sample.

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))
        }
    }
},

.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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