IsolatedStorageFile Class in .NET

This article has been excerpted from book "The Complete Visual C# Programmer's Guide" from the Authors of C# Corner.

The .NET Framework provides the IsolatedStorageFile class to represent a store for an assembly.

Listing 22.34 shows various aspects of IsolatedStorage namespace classes and methods.

Listing 22.34: IsolatedStorage Example

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.IO.IsolatedStorage;

using System.IO;

namespace IsolatedStorageFile_Class

{

class Program

{

static void Main(string[] args)

{

// isolated storage

// in System.IO.IsolatedStorage namespace

// Obtain a store

IsolatedStorageFile store1 =

IsolatedStorageFile.GetUserStoreForDomain();

// you can also use static GetStore methods like below

IsolatedStorageFile storefile1 = IsolatedStorageFile.GetStore(

IsolatedStorageScope.User |

IsolatedStorageScope.Assembly,

null,

null);

IsolatedStorageFile storefile1 = IsolatedStorageFile.GetStore(

IsolatedStorageScope.User |

IsolatedStorageScope.Assembly |

IsolatedStorageScope.Domain,

null,

null);

IsolatedStorageFile storefile1 = IsolatedStorageFile.GetStore(

IsolatedStorageScope.User |

IsolatedStorageScope.Assembly |

IsolatedStorageScope.Roaming,

null,

null);

IsolatedStorageFile storefile1 = IsolatedStorageFile.GetStore(

IsolatedStorageScope.User |

* IsolatedStorageScope.Assembly |

IsolatedStorageScope.Domain |

IsolatedStorageScope.Roaming,

null,

null);

IsolatedStorageFileStream stream1 =

new IsolatedStorageFileStream("file1.txt",

FileMode.Create, store1);

StreamWriter writer = new StreamWriter(stream1);

writer.WriteLine("Hello Isolated Storage");

writer.Close();

stream1.Close();

store1.Close();

// Read from a file in isolated storage

IsolatedStorageFileStream stream2 =

new IsolatedStorageFileStream("file2.txt",

FileMode.Open, store1);

StreamReader reader = new StreamReader(stream1);

String sb = reader.ReadToEnd();

reader.Close();

stream1.Close();

store1.Close();

// Obtain a store

// Create a directory

store1.CreateDirectory("dir1");

// Create two directories, one inside the other

store1.CreateDirectory("dir2/dir3");

// Create a directory

store1.CreateDirectory("dir4");

// Delete the directory

store1.DeleteDirectory("dir4");

// Obtain a store

IsolatedStorageFile store2 =

IsolatedStorageFile.GetUserStoreForDomain();

// Create an empty file

IsolatedStorageFileStream stream3 =

new IsolatedStorageFileStream("file3.txt",

FileMode.Create, store1);

stream1.Close();

// Delete the file

store1.DeleteFile("file3.txt");

// Find a storage space available

// Obtain a store

IsolatedStorageFile store3 =

IsolatedStorageFile.GetUserStoreForDomain();

// Compute the storage available in the store

ulong spaceLeft =

store1.MaximumSize - store1.CurrentSize;

// Enumerate files and directories

// Obtain a store

IsolatedStorageFile store4 =

IsolatedStorageFile.GetUserStoreForDomain();

// Get all of the directories in the root of the store

string[] directories = store1.GetDirectoryNames("*");

// Get all of the files in the root of the store

string[] files = store1.GetFileNames("*");

}

Conclusion

Hope this article would have helped you in understanding IsolatedStorageFile Class in .NET. See other articles on the website on .NET and C#.

The Complete Visual C# Programmer's Guide covers most of the major components that make up C# and the .net environment. The book is geared toward the intermediate programmer, but contains enough material to satisfy the advanced developer.

2 Comments

Join the conversation! Your thoughts help the community grow.

Osman Gumus16y ago
I guess there a few mistakes such as while creating and deleting file3.txt u used store1 instead of store2 or I didn't understand. And deleting file3.txt is not possible. Could u send this code again?
justit16y ago
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