/// <summary>
/// 检查合同信息信息是否存在
/// </summary>
/// <param name="predicate">检查谓语表达式</param>
/// <param name="id">更新的合同信息编号</param>
/// <returns>合同信息是否存在</returns>
public bool CheckContractExists(Expression <Func <Contract, bool> > predicate, int id = 0)
{
return(ContractRepository.CheckExists(predicate, id));
}