Read and write list to IsolatedStorage in Windows

问题:

I'm trying to simply save a list of strings to isolated storage on windows phone 8. I have simply created a list and save it this way:

IsolatedStorageSettings settings = IsolatedStorageSettings.ApplicationSettings;

List<String> projectList = new List<String>();

projectList.add("yo");

settings.add("yo", projectList");

settings.Save();

How do i read this data from IsolatedStorage and put it into the same list once the app starts up again? I'm looking for a simple method - which i haven't found on the web, i haven't managed to implement any of the solutions i found on the web, as they use different methods.

Please help, and thanks a lot!

回答1:

You can just cast the setting back into a List. I usually add a helper function to read settings, to prevent reading something that isn't saved:

private static object readSetting(string key)
{
    return IsolatedStorageSettings.ApplicationSettings.Contains(key) ? IsolatedStorageSettings.ApplicationSettings[key] : null;
}

You could use that function to restore your List, for example like this:

List<String> projectList = readSetting("yo") != null ? (List<String>)readSetting("yo") : new List<String>();