csharp System.Activities.OutArgument<T>类(方法)实例源码

Sequence workflow = new Sequence
{
    Variables = { mealExpense, result },
    Activities =
        {
            new Assign<Expense>
            {
               Value = new InArgument<Expense>( (e) => new Meal { Amount = 50, Location = "Redmond", Vendor = "KFC" }),
               To = new OutArgument<Expense>(mealExpense)
            },
            new WriteLine 
            {
                Text = new InArgument<string>("Hello")
            },
            approveExpense,
            new ReceiveReply
            {
                Request = approveExpense,                            
                Content = ReceiveContent.Create(new OutArgument<bool>(result))
            },

            new If
            {
               Condition = new InArgument<bool> (result),
               Then =                         
                    new WriteLine
                    {
                        Text = new InArgument<string>("Expense Approved")
                    },
               Else =                         
                    new WriteLine
                    {
                        Text = new InArgument<string>("Expense Cannot be Approved")
                    },
            },
        }
};

int dividend = 500;
int divisor = 36;

Dictionary<string, object> arguments = new Dictionary<string, object>();
arguments.Add("Dividend", dividend);
arguments.Add("Divisor", divisor);

IDictionary<string, object> outputs =
    WorkflowInvoker.Invoke(new Divide(), arguments);

Console.WriteLine("{0} / {1} = {2} Remainder {3}",
    dividend, divisor, outputs["Result"], outputs["Remainder"]);

public sealed class Divide : CodeActivity
{
    [RequiredArgument]
    public InArgument<int> Dividend { get; set; }

    [RequiredArgument]
    public InArgument<int> Divisor { get; set; }

    public OutArgument<int> Remainder { get; set; }
    public OutArgument<int> Result { get; set; }

    protected override void Execute(CodeActivityContext context)
    {
        int quotient = Dividend.Get(context) / Divisor.Get(context);
        int remainder = Dividend.Get(context) % Divisor.Get(context);

        Result.Set(context, quotient);
        Remainder.Set(context, remainder);
    }
}