IsolatedStorageFileStream Class

[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]

Exposes a file within isolated storage.

Inheritance Hierarchy

System..::.Object
System.IO..::.Stream
System.IO..::.FileStream
System.IO.IsolatedStorage..::.IsolatedStorageFileStream

Namespace: System.IO.IsolatedStorage
Assembly: mscorlib (in mscorlib.dll)

Syntax

Public Class IsolatedStorageFileStream _
    Inherits FileStream
public class IsolatedStorageFileStream : FileStream

The IsolatedStorageFileStream type exposes the following members.

Constructors

Name Description
IsolatedStorageFileStream(String, FileMode, IsolatedStorageFile) Initializes a new instance of the IsolatedStorageFileStream class giving access to the file designated by path, in the specified mode, and in the context of the IsolatedStorageFile specified by isf.
IsolatedStorageFileStream(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.
IsolatedStorageFileStream(String, FileMode, FileAccess, FileShare, 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, using the file sharing mode specified by share, and in the context of the IsolatedStorageFile specified by isf.

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Properties

Name Description
CanRead Gets a Boolean value indicating whether the file can be read. (Overrides FileStream..::.CanRead.)
CanSeek Gets a Boolean value indicating whether seek operations are supported. (Overrides FileStream..::.CanSeek.)
CanTimeout Gets a value that determines whether the current stream can time out. (Inherited from Stream.)
CanWrite Gets a Boolean value indicating whether you can write to the file. (Overrides FileStream..::.CanWrite.)
Length Gets the length of the IsolatedStorageFileStream object. (Overrides FileStream..::.Length.)
Name Gets the name of the file that was used to create the instance of the IsolatedStorageFileStream.
Position Gets or sets the current position of the current IsolatedStorageFileStream object. (Overrides FileStream..::.Position.)
ReadTimeout Gets or sets a value, in miliseconds, that determines how long the stream will attempt to read before timing out. (Inherited from Stream.)
WriteTimeout Gets or sets a value, in miliseconds, that determines how long the stream will attempt to write before timing out. (Inherited from Stream.)

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Methods

Name Description
BeginRead Begins an asynchronous read. (Overrides FileStream..::.BeginRead(array<Byte>[]()[], Int32, Int32, AsyncCallback, Object).)
BeginWrite Begins an asynchronous write. (Overrides FileStream..::.BeginWrite(array<Byte>[]()[], Int32, Int32, AsyncCallback, Object).)
Close Closes the current stream and releases any resources (such as sockets and file handles) associated with the current stream. (Inherited from Stream.)
CopyTo(Stream) Reads all the bytes from the current stream and writes them to the destination stream. (Inherited from Stream.)
CopyTo(Stream, Int32) Reads all the bytes from the current stream and writes them to a destination stream, using a specified buffer size. (Inherited from Stream.)
CopyToAsync(Stream) Asynchronously reads the bytes from the current stream and writes them to another stream. (Inherited from Stream.)
CopyToAsync(Stream, Int32) Asynchronously reads the bytes from the current stream and writes them to another stream, using a specified buffer size. (Inherited from Stream.)
CopyToAsync(Stream, Int32, CancellationToken) Asynchronously reads the bytes from the current stream and writes them to another stream, using a specified buffer size and cancellation token. (Inherited from Stream.)
Dispose()()() Releases all resources used by the Stream. (Inherited from Stream.)
Dispose(Boolean) Releases the unmanaged resources used by the IsolatedStorageFileStream and optionally releases the managed resources. (Overrides FileStream..::.Dispose(Boolean).)
EndRead Ends a pending asynchronous read request. (Overrides FileStream..::.EndRead(IAsyncResult).)
EndWrite Ends an asynchronous write. (Overrides FileStream..::.EndWrite(IAsyncResult).)
Equals(Object) Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
Finalize Ensures that resources are freed and other cleanup operations are performed when the garbage collector reclaims the FileStream. (Inherited from FileStream.)
Flush()()() Updates the file with the current state of the buffer then clears the buffer. (Overrides FileStream..::.Flush()()().)
Flush(Boolean) Clears buffers for this stream and causes any buffered data to be written to the file, and also clears all intermediate file buffers. (Overrides FileStream..::.Flush(Boolean).)
FlushAsync()()() Asynchronously clears all buffers for this stream and causes any buffered data to be written to the underlying device. (Inherited from Stream.)
FlushAsync(CancellationToken) Asynchronously clears all buffers for this stream, causes any buffered data to be written to the underlying device, and monitors cancellation requests. (Inherited from Stream.)
GetHashCode Serves as a hash function for a particular type. (Inherited from Object.)
GetType Gets the Type of the current instance. (Inherited from Object.)
MemberwiseClone Creates a shallow copy of the current Object. (Inherited from Object.)
Read Copies bytes from the current buffered IsolatedStorageFileStream object to an array. (Overrides FileStream..::.Read(array<Byte>[]()[], Int32, Int32).)
ReadAsync(array<Byte>[]()[], Int32, Int32) Asynchronously reads a sequence of bytes from the current stream and advances the position within the stream by the number of bytes read. (Inherited from Stream.)
ReadAsync(array<Byte>[]()[], Int32, Int32, CancellationToken) Asynchronously reads a sequence of bytes from the current stream, advances the position within the stream by the number of bytes read, and monitors cancellation requests. (Inherited from Stream.)
ReadByte Reads a single byte from the IsolatedStorageFileStream object in isolated storage. (Overrides FileStream..::.ReadByte()()().)
Seek Sets the current position of this IsolatedStorageFileStream object to the specified value. (Overrides FileStream..::.Seek(Int64, SeekOrigin).)
SetLength Sets the length of this IsolatedStorageFileStream object to the specified value. (Overrides FileStream..::.SetLength(Int64).)
ToString Returns a string that represents the current object. (Inherited from Object.)
Write Writes a block of bytes to the IsolatedStorageFileStream object using data read from a byte array. (Overrides FileStream..::.Write(array<Byte>[]()[], Int32, Int32).)
WriteAsync(array<Byte>[]()[], Int32, Int32) Asynchronously writes a sequence of bytes to the current stream and advances the current position within this stream by the number of bytes written. (Inherited from Stream.)
WriteAsync(array<Byte>[]()[], Int32, Int32, CancellationToken) Asynchronously writes a sequence of bytes to the current stream, advances the current position within this stream by the number of bytes written, and monitors cancellation requests. (Inherited from Stream.)
WriteByte Writes a single byte to the IsolatedStorageFileStream object. (Overrides FileStream..::.WriteByte(Byte).)

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Extension Methods

Name Description
AsInputStream (Defined by WindowsRuntimeStreamExtensions.)
AsOutputStream (Defined by WindowsRuntimeStreamExtensions.)

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Remarks

Use this class to read, write and create files in isolated storage.

Since this class extends FileStream, you can use an instance of IsolatedStorageFileStream in most situations where a FileStream might otherwise be used, such as to construct a StreamReader or StreamWriter.

Version Information

Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Platforms

Windows Phone

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

See Also

Reference

System.IO.IsolatedStorage Namespace

Other Resources

How to use the Isolated Storage Explorer tool for Windows Phone 8

How to store files and folders for Windows Phone