企業庫數據庫連接關閉

Question

我們正在使用Microsoft Enterprise庫來訪問sql服務器數據庫。我們對如何關閉數據庫連接有一些疑問。代碼如下。

DatabaseFactory.SetDatabaseProviderFactory(new DatabaseProviderFactory(), false);
Database db = new DatabaseProviderFactory().Create("Dataconnectionstring");
string sqlCommand = "";
DbCommand dbCommand = db.GetStoredProcCommand(sqlCommand);
dbCommand.CommandTimeout = 0;
try
{
  success = Convert.ToInt32(db.ExecuteScalar(dbCommand));
  return success;
}
  so how  can we close database connection.     

Answer 1

一種方法是使用using語句。
所有實現IDisposable對象都可以以這種方式使用，當代碼到達右括號時，它將調用Dispose()來擺脫該對象。

DatabaseFactory.SetDatabaseProviderFactory(new DatabaseProviderFactory(), false);
        int success = 0;
        using (var db = new DatabaseProviderFactory().Create("Dataconnectionstring"))
        {
            string sqlCommand = "";
            using (var dbCommand = db.GetStoredProcCommand(sqlCommand))
            {
                dbCommand.CommandTimeout = 0;
                try
                {
                    success = Convert.ToInt32(db.ExecuteScalar(dbCommand));
                }
            }
        }

    return success;