public void DBOperation(Constants.Action command, Merchant item = null, List <Int64> Ids = null)
{
switch (command)
{
case Constants.Action.Insert:
client.InsertMerchant(item);
break;
case Constants.Action.Delete:
client.DeleteMerchants(Ids);
break;
case Constants.Action.Update:
client.UpdateMerchant(item);
break;
default:
break;
}
}