等待异步函数C＃

Question

我正在使用WCF开发一个Silverlight项目。我需要在另一个WCF函数完成后从WCF调用一个函数。这是我的代码：

Int32 id = Convert.ToInt32(((TextBlock)dataGrid1.Columns[0].GetCellContent(dataGrid1.SelectedItem)).Text.ToString());
        Service1Client obj = new Service1Client();
        obj.DeletePersonAsync(id);

        //Wait for delete operation

        obj.GetPersonListCompleted += new EventHandler<GetPersonListCompletedEventArgs>(ListPeople);
        obj.GetPersonListAsync();

我该怎么做？

Answer 1

在obj.Delete Person Async（id）函数的回调中调用函数“GetPersonListAsync”。代码将如下所示：

   private void somefunction()
{
    Int32 id = Convert.ToInt32(((TextBlock)dataGrid1.Columns[0].GetCellContent(dataGrid1.SelectedItem)).Text.ToString());
    Service1Client obj = new Service1Client();
    obj.DeletePersonAsyncCompleted += new EventHandler<DeletePersonCompletedEventArgs>(PersonDeleted);

    obj.DeletePersonAsync(id);
}


    private void PersonDeleted(DeletePersonCompletedEventArgs serviceResponse)
    {
     //Wait for delete operation

    obj.GetPersonListCompleted += new EventHandler<GetPersonListCompletedEventArgs>(ListPeople);
    obj.GetPersonListAsync();
    }