語言

Switch<T>.Cases 屬性

定義

命名空間:
System.Activities.Statements
組件:
System.Activities.dll

代表潛在執行路徑的字典。 每個項目包含一個鍵值和一個活動，當表達式的結果與鍵值相符時會執行。

public:
 property System::Collections::Generic::IDictionary<T, System::Activities::Activity ^> ^ Cases { System::Collections::Generic::IDictionary<T, System::Activities::Activity ^> ^ get(); };
public System.Collections.Generic.IDictionary<T,System.Activities.Activity> Cases { get; }
member this.Cases : System.Collections.Generic.IDictionary<'T, System.Activities.Activity>
Public ReadOnly Property Cases As IDictionary(Of T, Activity)

屬性值

IDictionary<T,Activity>

處決路徑。

範例

以下程式碼範例示範如何設定活動的 Switch<T> Cases 屬性。

// check if the number is ok...
new Switch<int>()
{
    DisplayName = "Verify Value from User",
    Expression = ExpressionServices.Convert<int>( env => numberFromUser.Get(env).CompareTo(numberToGuess.Get(env)) ),
    Cases =
    {
        { 0, new Assign<bool>()
            {
                To = new OutArgument<bool>(finished),
                Value = true
            }
        },
        {  1, new WriteLine() { Text = "    Try a lower number number..." } },
        { -1, new WriteLine() { Text = "    Try a higher number" } }
    }
}

備註

當該活動執行時，執行的案例是第一個鍵與該 Expression 屬性相符的案例。

適用於