Dapper扩展之~~~Dapper.Contrib

平台之大势何人能挡？ 带着你的Net飞奔吧！http://www.cnblogs.com/dunitian/p/4822808.html#skill

注意点：Model里面的Table和Key是Dapper.Contrib.Extensions命名空间下的~~~~如果不是~~请看下篇文章（点我）

用法很简单，贴一下帮助类：

/// <summary>

    /// 扩展方法

    /// </summary>

    public abstract partial class DapperDataAsync

    {

        #region 查询系

        /// <summary>

        /// 获取Model-Key为int类型

        /// </summary>

        /// <typeparam name="T"></typeparam>

        /// <param name="id"></param>

        /// <param name="transaction"></param>

        /// <param name="commandTimeout"></param>

        /// <returns></returns>

        public static async Task<T> GetAsync<T>(int id, IDbTransaction transaction = null, int? commandTimeout = null) where T : class, new()

        {

            using (var conn = ConnFactory.GetConnection())

            {

                return await conn.GetAsync<T>(id, transaction, commandTimeout);

            }

        }

        /// <summary>

        /// 获取Model-Key为long类型

        /// </summary>

        /// <typeparam name="T"></typeparam>

        /// <param name="id"></param>

        /// <param name="transaction"></param>

        /// <param name="commandTimeout"></param>

        /// <returns></returns>

        public static async Task<T> GetAsync<T>(long id, IDbTransaction transaction = null, int? commandTimeout = null) where T : class, new()

        {

            using (var conn = ConnFactory.GetConnection())

            {

                return await conn.GetAsync<T>(id, transaction, commandTimeout);

            }

        }

        /// <summary>

        /// 获取Model-Key为Guid类型

        /// </summary>

        /// <typeparam name="T"></typeparam>

        /// <param name="id"></param>

        /// <param name="transaction"></param>

        /// <param name="commandTimeout"></param>

        /// <returns></returns>

        public static async Task<T> GetAsync<T>(System.Guid id, IDbTransaction transaction = null, int? commandTimeout = null) where T : class, new()

        {

            using (var conn = ConnFactory.GetConnection())

            {

                return await conn.GetAsync<T>(id, transaction, commandTimeout);

            }

        }

        /// <summary>

        /// 获取Model-Key为string类型

        /// </summary>

        /// <typeparam name="T"></typeparam>

        /// <param name="id"></param>

        /// <param name="transaction"></param>

        /// <param name="commandTimeout"></param>

        /// <returns></returns>

        public static async Task<T> GetAsync<T>(string id, IDbTransaction transaction = null, int? commandTimeout = null) where T : class, new()

        {

            using (var conn = ConnFactory.GetConnection())

            {

                return await conn.GetAsync<T>(id, transaction, commandTimeout);

            }

        }

        /// <summary>

        /// 获取Model集合（没有Where条件）

        /// </summary>

        /// <typeparam name="T"></typeparam>

        /// <returns></returns>

        public static async Task<IEnumerable<T>> GetAllAsync<T>() where T : class, new()

        {

            using (var conn = ConnFactory.GetConnection())

            {

                return await conn.GetAllAsync<T>();

            }

        }

        #endregion
#region 增删改

        /// <summary>

        /// 插入一个Model

        /// </summary>

        /// <typeparam name="T"></typeparam>

        /// <param name="model"></param>

        /// <param name="transaction"></param>

        /// <param name="commandTimeout"></param>

        /// <param name="sqlAdapter"></param>

        /// <returns></returns>

        public static async Task<int> InsertAsync<T>(T model, IDbTransaction transaction = null, int? commandTimeout = null) where T : class, new()

        {

            using (var conn = ConnFactory.GetConnection())

            {

                return await conn.InsertAsync<T>(model, transaction, commandTimeout);

            }

        }
/// <summary>

        /// 更新一个Model

        /// </summary>

        /// <typeparam name="T"></typeparam>

        /// <param name="connection"></param>

        /// <param name="entityToUpdate"></param>

        /// <param name="transaction"></param>

        /// <param name="commandTimeout"></param>

        /// <returns></returns>

        public static async Task<T> UpdateAsync<T>(T model, IDbTransaction transaction = null, int? commandTimeout = null) where T : class, new()

        {

            using (var conn = ConnFactory.GetConnection())

            {

                bool b = await conn.UpdateAsync<T>(model, transaction, commandTimeout);

                if (b) { return model; }

                else { return null; }

            }

        }

        #endregion
#region 分页查询

        /// <summary>

        /// 分页查询(为什么不用out，请参考：http://www.cnblogs.com/dunitian/p/5556909.html)

        /// </summary>

        /// <param name="sql">查询语句</param>

        /// <param name="p">动态参数</param>

        /// <param name="sqlTotal">total语句</param>

        /// <param name="p2">Total动态参数</param>

        /// <returns></returns>

        public static async Task<string> PageLoadAsync<T>(string sql, object p = null, string sqlTotal = "", object p2 = null)

        {

            var rows = await QueryAsync<T>(sql.ToString(), p);

            var total = rows.Count();

            if (!sqlTotal.IsNullOrWhiteSpace()) { total = await ExecuteScalarAsync<int>(sqlTotal, p2); }

            return new { rows = rows, total = total }.ObjectToJson();

        }

        #endregion

    }