Pick 類別

定義

提供事件架構控制流程模型。Provides event-based control flow modeling.

public ref class Pick sealed : System::Activities::NativeActivity
[System.Windows.Markup.ContentProperty("Branches")]
public sealed class Pick : System.Activities.NativeActivity
type Pick = class
    inherit NativeActivity
Public NotInheritable Class Pick
Inherits NativeActivity
繼承
屬性

範例

下列程式碼範例將示範如何建立 Pick 活動。The following code sample demonstrates creating a Pick activity. 這個範例來自使用 Pick 活動範例。This example is from the Using the Pick Activity sample.

static Activity CreateWF()
{
    Variable<string> name = new Variable<string>();
    Sequence body = new Sequence
    {
        Variables = { name },
        Activities = 
        {
            new WriteLine { Text = "What is your name? (You have 5 seconds to answer)" },
            new Pick
            {
               Branches = 
               {
                   new PickBranch
                    {
                       Trigger = new ReadString
                       {
                           Result = name,
                           BookmarkName = bookmarkName
                       },
                       Action = new WriteLine 
                       { 
                           Text = new InArgument<string>(env => "Hello " + name.Get(env)) 
                       }
                   },
                   new PickBranch
                    {
                       Trigger = new Delay
                       {
                           Duration = TimeSpan.FromSeconds(5)
                       },
                       Action = new WriteLine
                       {
                           Text = "Time is up."
                       }
                   }
               }
           }
       }
    };

    return body;
}

備註

這個活動的行為類似於 Switch<T>,因為它只會執行多個活動中的其中一個來回應事件。This activity behaves similarly to Switch<T> in that it executes only one of several activities in response to events. 選擇要執行的動作是由從一組事件中選擇的事件所定義。The action chosen to be executed is defined by an event, chosen from a set of events.

建構函式

Pick()

建立 Pick 類別的新執行個體。Creates a new instance of the Pick class.

屬性

Branches

PickBranch 物件的集合,Pick 活動可能會根據傳入事件執行其中一個物件。The collection of PickBranch objects that the Pick activity potentially executes one of, based on incoming events.

CacheId

取得工作流程定義範圍內的唯一快取識別碼。Gets the identifier of the cache that is unique within the scope of the workflow definition.

(繼承來源 Activity)
CanInduceIdle

取得或設定值,這個值指出此活動是否會造成工作流程變為閒置。Gets or sets a value that indicates whether the activity can cause the workflow to become idle.

(繼承來源 NativeActivity)
Constraints

取得 Constraint 活動的集合,這些活動可以設定為提供 Activity 的驗證。Gets a collection of Constraint activities that can be configured to provide validation for the Activity.

(繼承來源 Activity)
DisplayName

取得或設定選擇性的易記名稱,這個名稱會用於偵錯、驗證、例外狀況處理及追蹤。Gets or sets an optional friendly name that is used for debugging, validation, exception handling, and tracking.

(繼承來源 Activity)
Id

取得工作流程定義範圍內的唯一識別碼。Gets an identifier that is unique in the scope of the workflow definition.

(繼承來源 Activity)
Implementation

活動的執行邏輯。The execution logic of the activity.

(繼承來源 NativeActivity)
ImplementationVersion

取得或設定活動的實作版本。Gets or sets the implementation version of the activity.

(繼承來源 NativeActivity)

方法

Abort(NativeActivityAbortContext)

在衍生類別中實作時,會採取動作以回應中止的活動。When implemented in a derived class, takes actions in response to the activity being aborted.

(繼承來源 NativeActivity)
CacheMetadata(ActivityMetadata)

未實作。Not implemented. 請改用 CacheMetadata(NativeActivityMetadata) 方法。Use the CacheMetadata(NativeActivityMetadata) method instead.

(繼承來源 NativeActivity)
CacheMetadata(NativeActivityMetadata)

建立並驗證活動引數、變數、子活動和活動委派的描述。Creates and validates a description of the activity's arguments, variables, child activities, and activity delegates.

(繼承來源 NativeActivity)
Cancel(NativeActivityContext)

在衍生類別中實作時,執行邏輯以便在非失誤性的狀況下及早完成活動。When implemented in a derived class, runs logic to cause graceful early completion of the activity.

(繼承來源 NativeActivity)
Equals(Object)

判斷指定的物件是否等於目前的物件。Determines whether the specified object is equal to the current object.

(繼承來源 Object)
Execute(NativeActivityContext)

在衍生類別中實作時,執行活動的執行邏輯。When implemented in a derived class, runs the activity's execution logic.

(繼承來源 NativeActivity)
GetHashCode()

作為預設雜湊函數。Serves as the default hash function.

(繼承來源 Object)
GetType()

取得目前執行個體的 TypeGets the Type of the current instance.

(繼承來源 Object)
MemberwiseClone()

建立目前 Object 的淺層複製。Creates a shallow copy of the current Object.

(繼承來源 Object)
OnCreateDynamicUpdateMap(NativeActivityUpdateMapMetadata, Activity)

建立動態更新的對應時引發事件。Raises an event when creating a map for the dynamic update.

(繼承來源 NativeActivity)
OnCreateDynamicUpdateMap(UpdateMapMetadata, Activity)

建立動態更新的對應時引發事件。Raises an event when creating a map for the dynamic update.

(繼承來源 NativeActivity)
ShouldSerializeDisplayName()

指出是否應序列化 DisplayName 屬性。Indicates whether the DisplayName property should be serialized.

(繼承來源 Activity)
ToString()

傳回包含 StringIdDisplayNameActivityReturns a String that contains the Id and DisplayName of the Activity.

(繼承來源 Activity)
UpdateInstance(NativeActivityUpdateContext)

更新 NativeActivity 的執行個體。Updates the instance of NativeActivity.

(繼承來源 NativeActivity)

適用於