FlowSwitch<T>.Expression 屬性

定義

命名空間:

System.Activities.Statements

組件:

System.Activities.dll

要針對 Cases 之集合評估的運算式。

public:
 property System::Activities::Activity<T> ^ Expression { System::Activities::Activity<T> ^ get(); void set(System::Activities::Activity<T> ^ value); };

public System.Activities.Activity<T> Expression { get; set; }

member this.Expression : System.Activities.Activity<'T> with get, set

Public Property Expression As Activity(Of T)

屬性值

Activity<T>

要評估的運算式。

範例

下列程式碼範例將示範如何設定 FlowSwitch<T> 節點的 Expression 屬性。 此範例來自 使用 TryCatch 的流程圖活動中的錯誤處理 範例。

FlowSwitch<string> promoCodeSwitch = new FlowSwitch<string>
{
    Expression = promo,
    Cases =
    {
       { "Single", singleStep },
       { "MNK", mnkStep },
       { "MWK", mwkStep }
    },
    Default = discountDefault
};