如何将文件从IsolatedStorage上载到SkyDrive
本文关键字:上载 SkyDrive IsolatedStorage 文件 | 更新日期: 2023-09-27 18:22:11
我正在尝试将文本文件myFile.txt上载到SkyDrive。以下是代码:
private async void btnUpload_Click( object sender, System.Windows.RoutedEventArgs e )
{
Client = new LiveConnectClient( _session );
string filename = "myFile.txt";
var isolatedstorageFile= await ApplicationData.Current.LocalFolder.CreateFileAsync( filename, CreationCollisionOption.ReplaceExisting );
using ( StreamWriter writer = new StreamWriter( await isolatedstorageFile.OpenStreamForWriteAsync() ) )
{
// convert to string
var _String = Serialize( "this is a test file" );
await writer.WriteAsync( _String );
}
await Client.BackgroundUploadAsync( FolderID, new Uri( isolatedstorageFile.Path ), OverwriteOption.Overwrite );
}
FolderID是全局的,其值为:"folder.17ff6230f5f26b89.17ff6230f5f26b89!1533"
问题在于定义BackgroundUploadAsync的第二个参数。我该如何解决它,即指定"myFile.txt"IsolatedStorage文件所在位置的URI?
谢谢,
您在BackgroundUploadAsync
中传递了3个参数,其中第一个是FolderId,第二个是文件的路径,这是错误的。请首先检查文档,第二参数只使用文件名而不使用文件的路径。第三个是文件流。
也可以使用UploadAsync
而不是BackgroundUploadAsync
。
IsolatedStorageFileStream isfs = isf.OpenFile(FileName, FileMode.Open, FileAccess.Read);
var res = await client.UploadAsync(folderId, FileName, isfs, OverwriteOption.Overwrite);
使用此链接进行引用。
你在上传时遇到了问题,我想是因为你试图上传的文件不在隔离存储的共享/传输文件夹中。所以只需在共享/传输中创建文件,然后尝试将文件上传到sky驱动器。
为了使用BackgroundUploadAsync
方法从隔离存储上传文件,您需要文件的正确URI。访问存储在隔离存储中的文件的路径是/shared/transfers/
。因此,要将URI参数传递给该方法,请在文件名前面加上/shared/transfers/
。这将是有效的URI。见下文:
await Client.BackgroundUploadAsync(FolderID, new Uri("/shared/transfers/" + fileName, UriKind.Relative), OverwriteOption.Overwrite );
另一种选择是使用UploadAsync
方法并附加流。
谢谢你给我的所有指针。重写函数,它是这样的:
private async void btnUpload_Click( object sender, System.Windows.RoutedEventArgs e )
{
string filename = "myFile.txt";
StorageFolder folder = await ApplicationData.Current.LocalFolder.CreateFolderAsync( "Shared", CreationCollisionOption.OpenIfExists );
folder = await folder.CreateFolderAsync( "transfers", CreationCollisionOption.OpenIfExists );
var isolatedstorageFile= await folder.CreateFileAsync( filename, CreationCollisionOption.ReplaceExisting );
using ( StreamWriter writer = new StreamWriter( await isolatedstorageFile.OpenStreamForWriteAsync() ) )
{
// convert to string
var _String = Serialize( "this is a test file" );
await writer.WriteAsync( _String );
}
await LiveHelper.Client.BackgroundUploadAsync( FolderID, new Uri( "/shared/transfers/" + filename, UriKind.Relative ), OverwriteOption.Overwrite );
}
private static string Serialize( object objectToSerialize )
{
using ( MemoryStream _Stream = new MemoryStream() )
{
try
{
var _Serializer = new DataContractJsonSerializer( objectToSerialize.GetType() );
_Serializer.WriteObject( _Stream, objectToSerialize );
_Stream.Position = 0;
StreamReader _Reader = new StreamReader( _Stream );
return _Reader.ReadToEnd();
}
catch ( Exception e )
{
Debug.WriteLine( "'n******** Serialize:" + e.Message );
return string.Empty;
}
}
}
文件已上载到正确的FolderID中。
艾坦
要将文件上传到Skydrive,文件应保存在IsolatedStorage的"/shared/transfers/"文件夹中。LiveConnectClient只能从/向"/shared/transfers/"上传/下载文件。