/// <summary>
/// 获取新的rcid文本
/// </summary>
/// <param name="context"></param>
/// <returns></returns>
public static string GetNewRcId(this PinhuaContext context)
{
var newId = context.GetNewId(26, 1);
var rcId = "rc" + DateTime.Now.ToString("yyyyMMdd") + newId.ToString("D5");
return(newId == 0 ? "" : rcId);
}