winrt组件改写，原来函数带ref

Question

hi,

我在尝试进行将原来编码改写成winrt组件的行为，由于winrt组件有许多限制

形如  public string GetHeader(ref string strin, string sHeader)

应该如何改写

Answer 1

我是这样写的，在异步（async）方法中不能使用ref  out,不是异步的可以

方法定义：

    private void SearchLocation(string City, ref  Location location)
        {
            foreach (Data.BingMap item in (this.DataContext as Data.ViewModelBingMap).BingMapView)
            {
                if (item.DescCity.Equals(City.Trim()))
                {
                    location.Latitude = item.Latitude;
                    location.Longitude = item.Longitude;
                    break;
                }

            }
        }

 引用：

            Bing.Maps.Location location = new Bing.Maps.Location();

            SearchLocation((sender as Pushpin).Text, ref  location);

不知道是否对你有用。

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maming

Answer 2

Hi,

这个在组件中的确是没办法用的，我建议参数直接使用引用类型比较好。

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Aaron Xue [MSFT]
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