IsolatedStorageFileStream Constructor (String, FileMode, FileAccess, IsolatedStorageFile)
Initializes a new instance of the IsolatedStorageFileStream class giving access to the file designated by path in the specified mode, with the specified file access, and in the context of the IsolatedStorageFile specified by isf.
Namespace: System.IO.IsolatedStorage
Assembly: mscorlib (in mscorlib.dll)
'Declaration Public Sub New ( _ path As String, _ mode As FileMode, _ access As FileAccess, _ isf As IsolatedStorageFile _ )
Parameters
- path
- Type: System.String
The relative path of the file within isolated storage.
- mode
- Type: System.IO.FileMode
One of the FileMode values.
- access
- Type: System.IO.FileAccess
A bitwise combination of the FileAccess values.
- isf
- Type: System.IO.IsolatedStorage.IsolatedStorageFile
The IsolatedStorageFile in which to open the IsolatedStorageFileStream.
| Exception | Condition |
|---|---|
| ArgumentException | The path is badly formed. |
| ArgumentNullException | The path is Nothing. |
| ObjectDisposedException | The isolated store is closed. |
| FileNotFoundException | No file was found and the mode is set to Open. |
| IsolatedStorageException | isf does not have a quota. |
The mode parameter indicates whether a new file should be created or an existing one used. The access parameter includes read-only, read/write, and write-only.
.gif?cs-save-lang=1&cs-lang=vb "Caution note") Caution |
|---|
When you compile a set of characters with a particular cultural setting and retrieve those same characters with a different cultural setting, the characters might not be interpretable, and can cause an exception to be thrown. |
The following code example demonstrates the use of this constructor. For the complete context of this example, see the IsolatedStorageFileStream overview.
Dim isoFile As IsolatedStorageFile isoFile = IsolatedStorageFile.GetUserStoreForDomain() ' Open or create a writable file. Dim isoStream As New IsolatedStorageFileStream(Me.userName, FileMode.OpenOrCreate, _ FileAccess.Write, isoFile) Dim writer As New StreamWriter(isoStream) writer.WriteLine(Me.NewsUrl) writer.WriteLine(Me.SportsUrl) ' Calculate the amount of space used to record the user's preferences. Dim d As Double = Convert.ToDouble(isoFile.CurrentSize) / Convert.ToDouble(isoFile.MaximumSize) Console.WriteLine(("CurrentSize = " & isoFile.CurrentSize.ToString())) Console.WriteLine(("MaximumSize = " & isoFile.MaximumSize.ToString())) ' StreamWriter.Close implicitly closes isoStream. writer.Close() isoFile.Dispose() isoFile.Close() Return d
- IsolatedStorageFilePermission
for isolated storage access
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
