NativeActivity<TResult>.Execute(NativeActivityContext) 方法

定义

命名空间:

System.Activities

程序集:

System.Activities.dll

在派生类中实现时，运行活动的执行逻辑。

protected:
 abstract void Execute(System::Activities::NativeActivityContext ^ context);

protected abstract void Execute (System.Activities.NativeActivityContext context);

abstract member Execute : System.Activities.NativeActivityContext -> unit

Protected MustOverride Sub Execute (context As NativeActivityContext)

参数

context

NativeActivityContext

执行活动时所处的执行上下文。

示例

下面的代码示例演示如何在一个从 NativeActivity<TResult> 继承的类中使用 Execute。 此示例来自 非泛型 ParallelForEach 示例。

protected override void Execute(NativeActivityContext context)
{
    IEnumerable values = this.Values.Get(context);
    if (values == null)
    {
        throw new InvalidOperationException("ParallelForEach requires a non-null Values argument.");
    }

    IEnumerator valueEnumerator = values.GetEnumerator();

    CompletionCallback onBodyComplete = new CompletionCallback(OnBodyComplete);
    while (valueEnumerator.MoveNext())
    {
        if (this.Body != null)
        {
            context.ScheduleAction(this.Body, valueEnumerator.Current, onBodyComplete);
        }
    }
    IDisposable disposable = valueEnumerator as IDisposable;
    if (disposable != null)
    {
        disposable.Dispose();
    }
}