How to get path of isolated storage in silverlight? - silverlight

Question

I read a similar post here... I tried implementing it but getting an exception saying
Attempt by method 'get_path_isolated.Page.button1_Click(System.Object, System.Windows.RoutedEventArgs)' to access field 'System.IO.IsolatedStorage.IsolatedStorageFileStream.m_FullPath' failed.
I have this code
public void button1_Click(object sender, RoutedEventArgs e)
{
isoStore = IsolatedStorageFile.GetUserStoreForApplication();
isoStore.CreateDirectory("root_dir");
IsolatedStorageFileStream iostream = new IsolatedStorageFileStream("sampleFile.txt", FileMode.Create, isoStore);
StreamWriter writer = new StreamWriter(iostream);
writer.Write("jaimokar");
try
{
FieldInfo pi = iostream.GetType().GetField("m_FullPath", BindingFlags.Instance | BindingFlags.NonPublic);
string path = pi.GetValue(iostream).ToString();
}
catch (Exception ex)
{
textBox1.Text += ex.Message;
}
where I'm going wrong? Please help me..

Answer 1

For those that have Elevated Permissions (especially in browser) I have come up with a semi-functional solution to determine the path. Unfortunately, if you switch from dev to live you will see a different folder path, so you have to include it here, also you should add a check for which version you are running (dev or live) via a passed in page parameter or the host url or so
private string GetProfilePath() {
var fullname = string.Empty;
try
{
// ReSharper disable IdentifierTypo
// ReSharper disable CommentTypo
var profilePath = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData);
profilePath = Path.GetDirectoryName(profilePath);
profilePath = Path.Combine(profilePath, #"LocalLow\Microsoft\Silverlight\is");
//profilePath = Path.Combine(profilePath, IsoPathStaging + "\\");
var directoryInfo = new DirectoryInfo(profilePath); // C:\Users\<username>\AppData\LocalLow\Microsoft\Silverlight\is --constant
var dirs = directoryInfo.EnumerateDirectories();
// ReSharper disable PossibleMultipleEnumeration
fullname = "1: " + dirs.First().FullName;
dirs = dirs.First().EnumerateDirectories(); // \ir5ffeej.4of --random
fullname = "2: " + dirs.First().FullName;
dirs = dirs.First().EnumerateDirectories(); // \lfab1wva.xmb --random
fullname = "3: " + dirs.First().FullName;
dirs = dirs.First().EnumerateDirectories(); // \1 --constant
fullname = "4: " + dirs.First().FullName;
dirs = dirs.Where(d => d.Name == "s"); // \s --constant
fullname = "5: " + dirs.First().FullName;
var dirs2 = dirs.First().EnumerateDirectories()
.Where(d => d.Name == "sbudlbc2oqx0eo0odi5nzpo2qppp3zmxxxxxxxxxxxxxxxxxxxxxxxxx").ToList(); // \<dev dir> --constant-ish
if (!dirs2.Any())
{
dirs2 = dirs.First().EnumerateDirectories()
.Where(d => d.Name == "2gbsxl5no1wzqebnzbj2wglhi33za1rxxxxxxxxxxxxxxxxxxxxxxxxx").ToList(); // \<live dir> --constant-ish
}
if (!dirs2.Any())
{
throw new Exception("Unable to locate silverlight storage");
}
fullname = "6: " + dirs2.First().FullName;
dirs = dirs2.First().EnumerateDirectories().Where(d => d.Name == "f"); // \f --constant
fullname = "7: " + dirs.First().FullName;
var dir = dirs.First(); // final
fullname = dir.FullName;
// ReSharper restore CommentTypo
// ReSharper restore PossibleMultipleEnumeration
return fullname;
// ReSharper restore IdentifierTypo
}
catch (NotSupportedException ex)
{
Debug.WriteLine(ex);
MessageBox.Show(
"Failed to run (Not Supported):"
+ Environment.NewLine + fullname
+ Environment.NewLine + ex.Message,
messageBoxTitle,
MessageBoxButton.OK);
CheckElevatedPermissions();
return string.Empty;
}
catch (Exception ex)
{
Debug.WriteLine(ex);
MessageBox.Show(
"Failed to run:"
+ Environment.NewLine + fullname
+ Environment.NewLine + ex.Message,
messageBoxTitle,
MessageBoxButton.OK);
return string.Empty;
}
}
Again, you must have elevated rights for this to work, later I would use this path to locate a file for some other use:
var fullPath = Path.Combine(GetProfilePath(), FileName);
Run(fullPath.Replace("\\\\", "\\"));
private static void Run(string fullPath)
{
try
{
CheckElevatedPermissions();
var shell = AutomationFactory.CreateObject("WScript.Shell");
shell.Run("\"" + fullPath + "\"");
}
catch (NotSupportedException ex)
{
Debug.WriteLine(ex);
MessageBox.Show(
"Failed to run (Not Supported):"
+ Environment.NewLine + fullPath
+ Environment.NewLine + ex.Message,
messageBoxTitle,
MessageBoxButton.OK);
CheckElevatedPermissions();
}
catch (Exception ex)
{
Debug.WriteLine(ex);
MessageBox.Show(
"Failed to run:"
+ Environment.NewLine + fullPath
+ Environment.NewLine + ex.Message,
messageBoxTitle,
MessageBoxButton.OK);
}
}