protected virtual void OnSelectingChanges(SelectingChangesEventArgs args)
{
if (SelectingChanges != null)
{
SelectingChanges(this, args);
}
}
/// <summary>
/// Selects for a table in the server database the inserts, updates, and deletes to apply to the client database for a synchronization group.
/// </summary>
/// <param name="groupMetadata">A SyncGroupMetadata object that contains metadata about the synchronization group.</param>
/// <param name="syncSession">A SyncSession object that contains synchronization session variables, such as the ID of the client that is synchronizing.</param>
/// <returns>A SyncContext object that contains synchronization data and metadata.</returns>
public override SyncContext GetChanges(SyncGroupMetadata groupMetadata, SyncSession syncSession)
{//#DOWNLOAD a batch 1
if (groupMetadata == null)
{
throw new ArgumentNullException("groupMetadata");
}
if (syncSession == null)
{
throw new ArgumentNullException("syncSession");
}
SyncContext syncContext = new SyncContext();
DataSet dataSet = new DataSet();
groupMetadata = InitializeMetadata(groupMetadata, dataSet, syncContext);
SelectingChangesEventArgs selectingArgs = new SelectingChangesEventArgs(groupMetadata, syncSession, syncContext, Connection, null);
OnSelectingChanges(selectingArgs);
SyncSchema schema = new SyncSchema();
Collection <string> tables = new Collection <string>();
Collection <string> missingTables = new Collection <string>();
foreach (var tableMetadata in groupMetadata.TablesMetadata)
{
tables.Add(tableMetadata.TableName);
}
if (tables.Count > 0)
{
schema = GetSchemaInternal(tables, out missingTables);
}
if (missingTables != null)
{
string[] tableArray = new string[missingTables.Count];
missingTables.CopyTo(tableArray, 0);
SchemaException e = new SchemaException(String.Format(CultureInfo.CurrentCulture,
Messages.MissingTables, String.Join(", ", tableArray)));
e.SyncStage = SyncStage.ReadingSchema;
e.ErrorNumber = SyncErrorNumber.MissingTableSchema;
throw e;
}
// FIX: Get schema from somewhere (possibly the adapter or a temporary schema)
// Possible performance hit when in mobile
EnumerateChanges(groupMetadata, syncSession, syncContext, schema);
ChangesSelectedEventArgs selectedArgs = new ChangesSelectedEventArgs(groupMetadata, syncSession, syncContext, Connection, null);//sYNC tODO
OnChangesSelected(selectedArgs);
return(syncContext);
}
