將個性化數據保存到其它位置

namespace Wingtip.Providers {
  public class FileBasedPersonalizationProvider : PersonalizationProvider
  {
        public override string ApplicationName {
            get { ... } set { ... }
        }

        public override void Initialize(
            string name, NameValueCollection configSettings) { ... }

        public override int GetCountOfState(PersonalizationScope scope,
            PersonalizationStateQuery query) { ... }

        public override int ResetUserState(string path, 
            DateTime userInactiveSinceDate) { ... }

        protected override void LoadPersonalizationBlobs(
            WebPartManager webPartManager, string path, 
            string userName, ref byte[] sharedDataBlob, 
            ref byte[] userDataBlob) { ... }

        protected override void ResetPersonalizationBlob(
            WebPartManager webPartManager, string path, 
            string userName) { ... }

        public override int ResetState(PersonalizationScope scope, 
            string[] paths, string[] usernames) { ... }

        protected override void SavePersonalizationBlob(
            WebPartManager webPartManager, string path, 
            string userName, byte[] dataBlob) { ... }

        public override PersonalizationStateInfoCollection FindState(
            PersonalizationScope scope,
            PersonalizationStateQuery query, int pageIndex, 
            int pageSize, out int totalRecords) { ... }
   }
}

protected override void LoadPersonalizationBlobs(
  WebPartManager webPartManager, string path, string userName, 
  ref byte[] sharedDataBlob, ref byte[] userDataBlob)
{
  string allUsersFileName = HttpContext.Current.Server.MapPath(
    ConstructAllUsersDataFileName(path));
  string userFileName = HttpContext.Current.Server.MapPath(
    ConstructUserDataFileName(userName, path));
  allUsersFileName = string.Intern(allUsersFileName);
  userFileName     = string.Intern(userFileName);

  try
  {
    // Read in shared user data first.
    // Lock on the file name in case two clients try accessing 
    // the same file concurrently - note we lock on the Interned 
    // file name string, which will always return the same object 
    // for identical strings
    if (Monitor.TryEnter(allUsersFileName, 5000) &&
        File.Exists(allUsersFileName))
      sharedDataBlob = File.ReadAllBytes(allUsersFileName);
    else throw new ApplicationException("Monitor timed out");

    // Next read in user specific data (if there is any)
    if (Monitor.TryEnter(userFileName, 5000) &&
        File.Exists(userFileName))
      userDataBlob = File.ReadAllBytes(userFileName);
    else throw new ApplicationException("Monitor timed out");
  }
  finally 
  { 
    Monitor.Exit(allUsersFileName); 
    Monitor.Exit(userFileName); 
  }
}

protected override void SavePersonalizationBlob(
  WebPartManager webPartManager, string path, 
  string userName, byte[] dataBlob)
{
  string fileName = HttpContext.Current.Server.MapPath(
    string.IsNullOrEmpty(userName) ?
      ConstructAllUsersDataFileName(path) :
      ConstructUserDataFileName(userName, path));    

  fileName = string.Intern(fileName);
  try
  {  
    // lock on the file name in case two clients try accessing 
    // the same file concurrently
    if (Monitor.TryEnter(fileName, 5000))
    {
      File.WriteAllBytes(HttpContext.Current.Server.MapPath(
        fileName), dataBlob);
    }
    else throw new ApplicationException("Monitor timed out");
  }
  finally { Monitor.Exit(fileName); }
}

// Helper function for creating a unique file name for all users 
// based on a path
private string ConstructAllUsersDataFileName(string path)
{
  string fileName = 
    path.Replace('/', '_').Replace('~', '_').Replace('.', '_');
  return "~/App_Data/allusers" + fileName + ".bin";
}

// Helper function for creating a unique file name for a particular 
// user based on a path
private string ConstructUserDataFileName(string user, string path)
{
  string fileName = 
    path.Replace('/', '_').Replace('~', '_').Replace('.', '_');
  return "~/App_Data/" + user + fileName + ".bin";
}

<webParts>
  <personalization defaultProvider="FileBasedPersonalizationProvider">
    <providers>
      <add name="FileBasedPersonalizationProvider"
           type="Wingtip.Providers.FileBasedPersonalizationProvider" />
    </providers>
  </personalization>
</webParts>