C# 如何使用Windows.Web.Http在客户端设备上下载文件

我正在开发一个Windows到UWP应用程序。存在一个web服务，它在调用（GET）时返回一个文件。使用浏览器触发web服务时，它会在浏览器上成功下载文件

在UWP应用程序上，我使用

Windows.Web.Http

调用Web服务。我需要保存web服务发送的文件并将其保存到设备上

我目前有以下代码。不确定如何从web服务获取结果并保存到文件

public async Task DownloadFile(string WebServiceURL, string PathToSave)
{

    var myFilter = new Windows.Web.Http.Filters.HttpBaseProtocolFilter();
    myFilter.AllowUI = false;
    Windows.Web.Http.HttpClient client = new Windows.Web.Http.HttpClient(myFilter);
    Windows.Web.Http.HttpResponseMessage result = await client.GetAsync(new Uri(WebServiceURL));


    using (IInputStream inputStream = await result.Content.ReadAsInputStreamAsync())
    {
        //not sure if this is correct and if it is, how to save this to a file
    }

}

使用

System.Web.Http

，我可以通过以下方式轻松完成此操作：

Stream stream = result.Content.ReadAsStreamAsync().Result;
var fileStream = File.Create(PathToSave);
await stream.CopyToAsync(fileStream);
fileStream.Dispose();
stream.Dispose();

但是，使用

Windows.Web.Http

，我不知道如何才能做到这一点。请帮忙

这就是你要找的？ 像这样

var myFilter = new Windows.Web.Http.Filters.HttpBaseProtocolFilter();
            myFilter.AllowUI = false;
            Windows.Web.Http.HttpClient client = new Windows.Web.Http.HttpClient(myFilter);
            Windows.Web.Http.HttpResponseMessage result = await client.GetAsync(new Uri(WebServiceURL));

            //not sure if this is correct and if it is, how to save this to a file
            var file = await ApplicationData.Current.LocalFolder.CreateFileAsync("filename.tmp", CreationCollisionOption.GenerateUniqueName);
            using (var filestream = await file.OpenAsync(FileAccessMode.ReadWrite))
            {
                await result.Content.WriteToStreamAsync(filestream);
                await filestream.FlushAsync();

            }

这就是你要找的？ 像这样

var myFilter = new Windows.Web.Http.Filters.HttpBaseProtocolFilter();
            myFilter.AllowUI = false;
            Windows.Web.Http.HttpClient client = new Windows.Web.Http.HttpClient(myFilter);
            Windows.Web.Http.HttpResponseMessage result = await client.GetAsync(new Uri(WebServiceURL));

            //not sure if this is correct and if it is, how to save this to a file
            var file = await ApplicationData.Current.LocalFolder.CreateFileAsync("filename.tmp", CreationCollisionOption.GenerateUniqueName);
            using (var filestream = await file.OpenAsync(FileAccessMode.ReadWrite))
            {
                await result.Content.WriteToStreamAsync(filestream);
                await filestream.FlushAsync();

            }

---

啊，是的！谢谢！你能不能也检查一下你是否能在这里找到我的另一个问题？谢谢您应该避免

FlushAsync

-使用

块将关闭资源。啊，是的！谢谢！你能不能也检查一下你是否能在这里找到我的另一个问题？谢谢您应该避免使用
FlushAsync
-
using
块无论如何都会关闭资源。