OutArgument<T> 构造函数

定义

命名空间:

System.Activities

程序集:

System.Activities.dll

初始化 OutArgument<T> 类的新实例。

重载

OutArgument<T>()	使用默认值初始化 OutArgument<T> 类的新实例。
OutArgument<T>(Activity<Location<T>>)	使用指定的 OutArgument<T> 初始化 Activity<TResult> 类的新实例。
OutArgument<T>(DelegateArgument)	使用指定的 OutArgument<T> 初始化 DelegateArgument 类的新实例。
OutArgument<T>(Variable)	使用指定的 OutArgument<T> 初始化 Variable 类的新实例。
OutArgument<T>(Expression<Func<ActivityContext,T>>)	使用指定的表达式初始化 OutArgument<T> 类的新实例。

OutArgument<T>()

使用默认值初始化 OutArgument<T> 类的新实例。

public:
 OutArgument();

public OutArgument ();

Public Sub New ()

示例

下面的代码示例演示如何创建 OutArgument<T>。 此示例摘自“格式化程序”示例。

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")
                    },
            },
        }
};

OutArgument<T>(Activity<Location<T>>)

使用指定的 OutArgument<T> 初始化 Activity<TResult> 类的新实例。

public:
 OutArgument(System::Activities::Activity<System::Activities::Location<T> ^> ^ expression);

public OutArgument (System.Activities.Activity<System.Activities.Location<T>> expression);

new System.Activities.OutArgument<'T> : System.Activities.Activity<System.Activities.Location<'T>> -> System.Activities.OutArgument<'T>

Public Sub New (expression As Activity(Of Location(Of T)))

参数

expression

Activity<Location<T>>

参数的值。

OutArgument<T>(DelegateArgument)

使用指定的 OutArgument<T> 初始化 DelegateArgument 类的新实例。

public:
 OutArgument(System::Activities::DelegateArgument ^ delegateArgument);

public OutArgument (System.Activities.DelegateArgument delegateArgument);

new System.Activities.OutArgument<'T> : System.Activities.DelegateArgument -> System.Activities.OutArgument<'T>

Public Sub New (delegateArgument As DelegateArgument)

参数

delegateArgument

DelegateArgument

参数的值。

OutArgument<T>(Variable)

使用指定的 OutArgument<T> 初始化 Variable 类的新实例。

public:
 OutArgument(System::Activities::Variable ^ variable);

public OutArgument (System.Activities.Variable variable);

new System.Activities.OutArgument<'T> : System.Activities.Variable -> System.Activities.OutArgument<'T>

Public Sub New (variable As Variable)

参数

variable

Variable

参数的值。

OutArgument<T>(Expression<Func<ActivityContext,T>>)

使用指定的表达式初始化 OutArgument<T> 类的新实例。

public:
 OutArgument(System::Linq::Expressions::Expression<Func<System::Activities::ActivityContext ^, T> ^> ^ expression);

public OutArgument (System.Linq.Expressions.Expression<Func<System.Activities.ActivityContext,T>> expression);

new System.Activities.OutArgument<'T> : System.Linq.Expressions.Expression<Func<System.Activities.ActivityContext, 'T>> -> System.Activities.OutArgument<'T>

Public Sub New (expression As Expression(Of Func(Of ActivityContext, T)))

参数

expression

Expression<Func<ActivityContext,T>>

参数的值。