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Missing OpenStreamForWriteAsync on my StorageFile

  • Artikel

I have a sample that I use when serializing data in order to save it to a StorageFile in Windows 8 and Windows Phone 8. It looks a little something (or exactly) like this:

 StorageFile kittenFile = await ApplicationData.Current.LocalFolder.CreateFileAsync("Kittens4Ever.kittens", CreationCollisionOption.ReplaceExisting);

var writeStream = await kittenFile.OpenStreamForWriteAsync();
DataContractSerializer kittenSerial = new DataContractSerializer(typeof(ObservableCollection<Kitten>));
kittenSerial.WriteObject(writeStream, listOfKittens);
                        
await writeStream.FlushAsync();
writeStream.Close();

But I keep running into this problem where my StorageFile doesn’t have the OpenStreamForWriteAsync method available. After yelling and cursing and bing-ing the problem for a while, I realize the solution:

 

OpenStreamForWriterAsync (and OpenStreaForReadAsync) are extension methods that require System.IO to be added as a reference. So I just add it

 using System.IO;

and everything works fine.

Comments

  • Anonymous
    June 16, 2013
    it works! thanks a lot

  • Anonymous
    October 09, 2013
    Thank you so much for this! I was doing the same until I cam across your post!

  • Anonymous
    December 16, 2014
    Mil gracias, fue de muchisima ayuda :)

  • Anonymous
    January 05, 2015
    Thank you so much for this! I was doing the same until I cam across your post!