InOutArgument<T> Class

Definition

generic <typename T>
public ref class InOutArgument sealed : System::Activities::InOutArgument

[System.ComponentModel.TypeConverter(typeof(System.Activities.XamlIntegration.InOutArgumentConverter))]
[System.Windows.Markup.ContentProperty("Expression")]
public sealed class InOutArgument<T> : System.Activities.InOutArgument

[<System.ComponentModel.TypeConverter(typeof(System.Activities.XamlIntegration.InOutArgumentConverter))>]
[<System.Windows.Markup.ContentProperty("Expression")>]
type InOutArgument<'T> = class
    inherit InOutArgument

Public NotInheritable Class InOutArgument(Of T)
Inherits InOutArgument

Type Parameters

Inheritance

Object

Argument

InOutArgument

InOutArgument<T>

Attributes

TypeConverterAttribute ContentPropertyAttribute

Remarks

In this example, a custom Square activity has an InOutArgument<T> of type Int32 named N1. This argument is used to receive the value to be operated on and is also used to pass the result of the operation back out.

class Square : CodeActivity  
{  
    public Square() : base() { }  

    public InOutArgument<int> N1  
    {  
        get;  

        set;  
    }  

    protected override void Execute(CodeActivityContext context)  
    {  
        context.SetValue<int>(N1, N1.Get(context) * N1.Get(context));  
    }  
}  

In the following example, the Square activity is hosted in a workflow. A value is passed into the activity and the result is then displayed to the console window by a WriteLine activity.

Variable<int> n1 = new Variable<int>() { Default = 25 };  

Activity activity1 = new Sequence()  
{  
    Variables =   
    {  
        n1  
    },  
    Activities =   
    {  
        new Square()  
        {  
            N1 = new InOutArgument<int>(n1)  
        },  
        new WriteLine()  
        {  
            Text = new InArgument<string>(ctx => "Squared result: " + n1.Get(ctx))  
        }  
    }  
};  

WorkflowInvoker.Invoke(activity1);  

Constructors

Fields

Properties

Methods

Operators

Applies to