/// <summary>
/// OfflineSyncProvider method implementation to return a set of sync changes.
/// </summary>
/// <param name="state">A unique identifier for the changes that are uploaded</param>
/// <returns>The set of incremental changes to send to the service</returns>
public override ChangeSet GetChangeSet(Guid state)
{
var changeSet = new ChangeSet();
IEnumerable <SqlCeOfflineEntity> changes = _storageHandler.GetChanges(state);
changeSet.Data = changes.Select(c => (IOfflineEntity)c).ToList();
changeSet.IsLastBatch = true;
changeSet.ServerBlob = _storageHandler.GetAnchor();
return(changeSet);
}
private void buttonLogin_Click(object sender, EventArgs e)
{
try
{
if (String.IsNullOrEmpty(textBoxUserName.Text.Trim()))
{
MessageBox.Show("UserName cannot be empty", "Error", MessageBoxButtons.OK, MessageBoxIcon.Exclamation,
MessageBoxDefaultButton.Button1);
return;
}
var webRequest = (HttpWebRequest)WebRequest.Create(String.Format(Settings.LoginUrl, textBoxUserName.Text.Trim()));
var response = (HttpWebResponse)webRequest.GetResponse();
if (response.StatusCode != HttpStatusCode.OK)
{
MessageBox.Show("Login failed!", "Error", MessageBoxButtons.OK, MessageBoxIcon.Exclamation,
MessageBoxDefaultButton.Button1);
return;
}
using (Stream responseStream = response.GetResponseStream())
{
// Read the GUID
using (var reader = new StreamReader(responseStream))
{
var clientId = reader.ReadToEnd();
DataStoreHelper.ListDbFileName = clientId + ".sdf";
Settings.ClientId = clientId;
}
}
if (String.IsNullOrEmpty(Settings.ClientId) || String.IsNullOrEmpty(DataStoreHelper.ListDbFileName))
{
MessageBox.Show("Login failed!", "Error", MessageBoxButtons.OK, MessageBoxIcon.Exclamation,
MessageBoxDefaultButton.Button1);
return;
}
bool newUser = false;
if (!File.Exists(DataStoreHelper.ListDbFileName))
{
newUser = true;
}
DataStoreHelper.InitializeDataStore();
var storageHandler = new SqlCeStorageHandler();
byte[] anchor = storageHandler.GetAnchor();
if (null == anchor || 0 == anchor.Length)
{
newUser = true;
}
if (newUser)
{
// Do an initial sync and open the list view
DoInitialSync();
}
else
{
var lists = new Lists();
lists.ShowDialog();
}
}
catch (Exception exception)
{
MessageBox.Show(exception.Message, "Unhandled Error", MessageBoxButtons.OK,
MessageBoxIcon.Exclamation, MessageBoxDefaultButton.Button1);
}
}
