Accessing File from a random folder

Question

I am getting unauthorized access exception when i try to access a file

File.ReadAllBytes(file in document library) located in documents.

I am not able to access file in any folder any resolution to it, or it is windows 8 property

Answer 1

where is that file coming from ? you can't randomly access files. what is attchDetail ?

---

Microsoft Certified Solutions Developer - Windows Store Apps Using C#

Answer 2

File is in any folder like Documens, Picture or Music library, I need to get bytes of file.

Answer 3

for the libraries you need to set the permissions in the manifest file

---

Microsoft Certified Solutions Developer - Windows Store Apps Using C#

Answer 4

and you can use

var file = await KnownFolders.PicturesLibrary.GetFileAsync("filename");
            using (Stream s = await file.OpenStreamForReadAsync())
            {

            }

---

Microsoft Certified Solutions Developer - Windows Store Apps Using C#

Answer 5

Scenario is where file picker can select any file from system and that file is to be converted to byte array.
So known folder is of little use.

Answer 6

as soon youi have the StorageFile instance you are good to go. So if the user uses e FIleOpenPicker to give your app a file from e:\ you are good. You cant say File.Read("E:\file") you need the storagefile class for this

---

Microsoft Certified Solutions Developer - Windows Store Apps Using C#