ValueTypePropertyReference<TOperand,TResult> Klasse

Definition

generic <typename TOperand, typename TResult>
public ref class ValueTypePropertyReference sealed : System::Activities::CodeActivity<System::Activities::Location<TResult> ^>

public sealed class ValueTypePropertyReference<TOperand,TResult> : System.Activities.CodeActivity<System.Activities.Location<TResult>>

type ValueTypePropertyReference<'Operand, 'Result> = class
    inherit CodeActivity<Location<'Result>>

Public NotInheritable Class ValueTypePropertyReference(Of TOperand, TResult)
Inherits CodeActivity(Of Location(Of TResult))

Typparameter

Vererbung

Object

Activity

ActivityWithResult

Activity<TResult>

CodeActivity<Location<TResult>>

ValueTypePropertyReference<TOperand,TResult>

Beispiele

Im folgenden Codebeispiel wird ValueTypePropertyReference<TOperand,TResult> in einer Assign Aktivität ein string Wert einer Eigenschaft zugewiesen und der Konsole der Eigenschaftswert gedruckt. Die Assign Aktivität entspricht der folgenden Anweisung bei Verwendung des struct im folgenden Beispiel definierten Werts: myStructVariable.AProperty = "Hello";

// Define a struct with a property named AProperty.
struct StructWithProperty
{
    public string AProperty { get; set; }
}

public static void ValueTypePropertyReferenceSample()
{
    // Create a variable of type StructWithProperty to store the property.
    var swpvar = new Variable<StructWithProperty>("swpvar", new StructWithProperty());

    // Create the top-level activity to be invoked later.
    Activity myActivity = new Sequence
    {
        Variables = { swpvar },
        Activities =
        {
            // Create an Assign activity for a property named AProperty.
            new Assign<string>
            {
                To = new ValueTypePropertyReference<StructWithProperty, string>
                {
                    OperandLocation = swpvar,
                    PropertyName = "AProperty",
                },
                // Assign a string literal to AProperty.
                Value = "Hello",
            },
            // Create a WriteLine activity to write the value of AProperty to the console.
            new WriteLine()
            {
                Text = ExpressionServices.Convert<string>(ctx => swpvar.Get(ctx).AProperty),
            }
        }
    };

    // Invoke the Sequence activity.
    WorkflowInvoker.Invoke(myActivity);
}