/// <summary>
/// Refreshes the <see cref="MetadataProviderBase.Metadata"/> from an OLE DB data store.
/// </summary>
/// <exception cref="ArgumentNullException"><see cref="ConnectionString"/> or <see cref="SelectString"/> is set to a null or empty string.</exception>
protected override void RefreshMetadata()
{
if (string.IsNullOrEmpty(m_connectionString))
throw new ArgumentNullException("ConnectionString");
if (string.IsNullOrEmpty(m_selectString))
throw new ArgumentNullException("SelectString");
OleDbConnection connection = new OleDbConnection(m_connectionString);
try
{
// Open OleDb connection.
connection.Open();
// Update existing metadata.
MetadataUpdater metadataUpdater = new MetadataUpdater(Metadata);
metadataUpdater.UpdateMetadata(connection.ExecuteReader(m_selectString));
}
finally
{
if (connection != null)
connection.Dispose();
}
}
