Automatically caching data is useful when you do not want to rebuild the cache for each query. When you query data for the first time, the provider automatically initializes and builds a cache in the background. When AutoCache = true, the provider uses the cache for subsequent query executions, resulting in faster response times.

Configuring Automatic Caching

Caching the Cards Table

The following example caches the Cards table in the file specified by the CacheLocation property of the connection string.

C#

String connectionString = "Cache Location=C:\\cache.db;AutoCache=true;APIKey=myApiKey;Token=myGeneratedToken;";
using (TrelloConnection connection = new TrelloConnection(connectionString)) {
  TrelloCommand cmd = new TrelloCommand("SELECT Name, ListId FROM Cards WHERE CardId = '614060b2c37da423f30dc7d6'", connection);
  TrelloDataReader rdr = cmd.ExecuteReader();
  while (rdr.Read()) {
    Console.WriteLine("Read and cached the row with CardId " + rdr["CardId"]);
  }
}

VB.NET

Dim connectionString As [String] = "Cache Location=C:\\cache.db;AutoCache=true;APIKey=myApiKey;Token=myGeneratedToken;"
Using connection As New TrelloConnection(connectionString)
  Dim cmd As New TrelloCommand("SELECT Name, ListId FROM Cards WHERE CardId = '614060b2c37da423f30dc7d6'", connection)
  Dim rdr As TrelloDataReader = cmd.ExecuteReader()
  While rdr.Read()
	  Console.WriteLine("Read and cached the row with CardId " + rdr("CardId"))
  End While
End Using

Common Use Case

A common use for automatically caching data is to improve driver performance when making repeated requests to a live data source, such as building a report or creating a visualization. With auto caching enabled, repeated requests to the same data may be executed in a short period of time, but within an allowable tolerance (CacheTolerance) of what is considered "live" data.