private void UpgradeFromPreviousVersion()
{
try
{
// This works for both ClickOnce and non-ClickOnce applications, whereas
// ApplicationDeployment.CurrentDeployment.DataDirectory only works for ClickOnce applications
DirectoryInfo currentSettingsDir = new FileInfo(ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.PerUserRoamingAndLocal).FilePath).Directory;
if (currentSettingsDir == null)
{
throw new Exception("Failed to determine the location of the settings file.");
}
if (!currentSettingsDir.Exists)
{
currentSettingsDir.Create();
}
// LINQ to Objects for .NET 2.0 courtesy of LINQBridge (linqbridge.googlecode.com)
var previousSettings = (from dir in currentSettingsDir.Parent.GetDirectories()
let dirVer = new { Dir = dir, Ver = new Version(dir.Name) }
where dirVer.Ver < CurrentVersion
orderby dirVer.Ver descending
select dirVer).FirstOrDefault();
if (previousSettings == null)
{
return;
}
XmlElement userSettings = ReadUserSettings(previousSettings.Dir.GetFiles("user.config").Single().FullName);
userSettings = SettingsUpgrader.Upgrade(userSettings, previousSettings.Ver);
WriteUserSettings(userSettings, currentSettingsDir.FullName + @"\user.config", true);
Reload();
}
catch (Exception ex)
{
MessageBoxes.Alert(MessageBoxIcon.Error, "There was an error upgrading the the user settings from the previous version. The user settings will be reset.\n\n" + ex.Message);
Default.Reset();
}
}