PetaPoco 增删改查

1 查询单行

DBInstance.DB.SingleOrDefault<CompanyInfo11>(id);

/// <summary>
/// 根据id获取公司信息
/// </summary>
/// <param name="id"></param>
/// <returns></returns>

public static CompanyInfo11 GetCompanyById(int id)
{
return DBInstance.DB.SingleOrDefault<CompanyInfo11>(id);

}

2 查询结果集

DBInstance.DB.Query<CompanyInfo11>("where 1=1 order by Cid desc").ToList()

        /// <summary>
        /// 查询所有公司信息，按创建日期倒序
        /// </summary>
        /// <returns>数据表格</returns>
        public List<CompanyInfo11> Load()
        {
            List<CompanyInfo11> companyList = null;
            companyList= DBInstance.DB.Query<CompanyInfo11>("where 1=1 order by Cid desc").ToList();
            return companyList;
        }

3 根据条件查询结果集

  /// <summary>
        /// 查询所有公司信息，根据参数
        /// </summary>
        /// <returns>数据表格</returns>
        public List<CompanyInfo11> Load()
        {
            List<CompanyInfo11> companyList = null;
            companyList = DBInstance.DB.Query<CompanyInfo11>("where Cid>@0", 5).ToList();//第一个参数是@0,第二个参数是@1,等等
            return companyList;
        }