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Using Isolated Storage to save/load files on Windows Phone 7

· Mobile Zone

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I’m seeing a lot of forum threads with people asking how to save/load files on Windows Phone 7, well for XNA 4 in general.
You can use IsolatedStorage for that

using System.IO.IsolatedStorage;

Both save and load can be done by creating a IsolatedStorageFile, I then use a Filestream and write with a binaryWriter

IsolatedStorageFile store = IsolatedStorageFile.GetUserStoreForApplication(); // grab the storage
FileStream stream = store.OpenFile("test.txt", FileMode.Create); // Open a file in Create mode
BinaryWriter writer = new BinaryWriter(stream);
float myvar = 5.0f;
writer.Write("something");
writer.Write(myvar);
writer.Close();

For loading is pretty much the same thing:

IsolatedStorageFile store = IsolatedStorageFile.GetUserStoreForApplication();
 
if (store.FileExists("test.txt")) // Check if file exists
{
       IsolatedStorageFileStream save = new IsolatedStorageFileStream("test.txt", FileMode.Open, store);
       BinaryReader reader = new BinaryReader(save);
       string mystring = reader.ReadString();
       float myfloat  = (float)reader.ReadSingle();
       reader.Close();
}

Simple right? I really don’t know if this is the best way but I’ve tested on both the emulator and a real device and it works.

The Mobile Zone is brought to you in partnership with Strongloop and IBM.  Visually compose APIs with easy-to-use tooling. Learn how IBM API Connect provides near-universal access to data and services both on-premises and in the cloud.

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Published at DZone with permission of David Amador, DZone MVB. See the original article here.

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