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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)

public IsolatedStorageFileStream(
	string path,
	FileMode mode,
	FileAccess access,
	IsolatedStorageFile isf
)

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.

ExceptionCondition
ArgumentException

The path is badly formed.

ArgumentNullException

The path is null.

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.

Caution noteCaution

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.

IsolatedStorageFile isoFile;
isoFile = IsolatedStorageFile.GetUserStoreForDomain();

// Open or create a writable file.
IsolatedStorageFileStream isoStream =
    new IsolatedStorageFileStream(this.userName,
    FileMode.OpenOrCreate,
    FileAccess.Write,
    isoFile);

StreamWriter writer = new StreamWriter(isoStream);
writer.WriteLine(this.NewsUrl);
writer.WriteLine(this.SportsUrl);
// Calculate the amount of space used to record the user's preferences. 
double d = isoFile.CurrentSize / 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;

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, 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.

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