Dapper

Dapper

Dapper的牛逼就不扯蛋了，答应群友做个入门Demo的，现有园友需要，那么公开分享一下：

完整Demo：http://pan.baidu.com/s/1i3TcEzj

注 意 事 项：http://www.cnblogs.com/dunitian/p/5221058.html

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

先安装一下Dapper（建议用nuget包来管理）

连接字符串：

string connStr = "Data Source=.;Initial Catalog=DapperDB;User ID=用户名;Password=密码";

强类型：

#region 强类型
            //public static IEnumerable<T> Query<T>(this IDbConnection cnn, string sql, object param = null, SqlTransaction transaction = null, bool buffered = true)
            using  (SqlConnection conn =  new  SqlConnection(connStr))
            {
                conn.Open();

                //无参查询
                //var qqModeList = conn.Query<QQModel>("select Id,Name,Count from QQModel");
                //带参查询
                var  qqModeList = conn.Query<QQModel>( "select Id,Name,Count from QQModel where Id in @id and Count>@count" ,  new  { id =  new  int [] { 1, 2, 3, 4, 5, 6 }, count = 1 });
                foreach  ( var  item  in  qqModeList)
                {
                    Console.WriteLine(item.Id +  " "  + item.Name +  " "  + item.Count);
                }
            }
            #endregion

动态类型：

#region 动态类型
            ////逆天动态类型用的比较多[可能是MVC ViewBag用多了]
            //public static IEnumerable<dynamic> Query (this IDbConnection cnn, string sql, object param = null, SqlTransaction transaction = null, bool buffered = true)
            using  (SqlConnection conn =  new  SqlConnection(connStr))
            {
                conn.Open();
                var  qqModeList = conn.Query( "select Id,Name,Count from QQModel" ).ToList();
                foreach  ( var  item  in  qqModeList)
                {
                    Console.WriteLine(item.Id +  " "  + item.Name +  " "  + item.Count);
                }
            }
            #endregion

多映射：

using  (SqlConnection conn =  new  SqlConnection(connStr))
{
    string  sqlStr =  @"select A.Id,A.Title,S.SeoKeywords from Article A
                    inner join SeoTKD S on A.SeoId=S.Id
                    where A.Id in @ids" ;
    conn.Open();
    var  articleList = conn.Query(sqlStr,  new  { ids =  new  int [] { 41, 42, 43, 44, 45, 46, 47, 48 } });
    foreach  ( var  item  in  articleList)
    {
        Console.WriteLine(item.Id +  " | "  + item.SeoKeywords +  " | ："  + item.Title);
    }
}

　多返回值：

using  (SqlConnection conn =  new  SqlConnection(connStr))
{
    string  sqlStr =  @"select Id,Title,Author from Article where Id = @id
                      select * from QQModel where Name = @name
                      select * from SeoTKD where Status = @status" ;
    conn.Open();
    using  ( var  multi = conn.QueryMultiple(sqlStr,  new  { id = 11, name =  "打代码" , status = 99 }))
    {
        //multi.IsConsumed   reader的状态 ，true 是已经释放
        if  (!multi.IsConsumed)
        {
            //注意一个东西，Read获取的时候必须是按照上面返回表的顺序 （article，qqmodel，seotkd）
            //强类型
            var  articleList = multi.Read<Temp>(); //类不见得一定得和表名相同
            var  QQModelList = multi.Read<QQModel>();
            var  SeoTKDList = multi.Read<SeoTKD>();

            //动态类型
            //var articleList = multi.Read();
            //var QQModelList = multi.Read();
            //var SeoTKDList = multi.Read();

            #region 输出
            foreach  ( var  item  in  QQModelList)
            {
                Console.WriteLine(item.Id +  " "  + item.Name +  " "  + item.Count);
            }
            foreach  ( var  item  in  SeoTKDList)
            {
                Console.WriteLine(item.Id +  " | "  + item.SeoKeywords);
            }
            foreach  ( var  item  in  articleList)
            {
                Console.WriteLine(item.Author);
            }
            #endregion
        }

    }
}

　增删改查：（删项目里面基本上不用）

using  (SqlConnection conn =  new  SqlConnection(connStr))
{
    conn.Open();
    //增
    int  count = conn.Execute( "insert into Article values(@title,@content,@author,961,1,2,2,N'2015-11-23 11:06:36.553',N'2015-11-23 11:06:36.553',N'5,103,113',91,N'3,5,11',0,N'/Images/article/16.jpg')" ,  new  { title =  "Title1" , content =  "TContent1" , author =  "毒逆天"  });

    //改
    //int count = conn.Execute("update Article set Title=@title where Id=@id", new { title = "么么哒", id = 274 });
    if  (count > 0)
    {
        Console.WriteLine(count +  "条操作成功" );
    }
}

存储过程：

//查询
using  (SqlConnection conn =  new  SqlConnection(connStr))
{
    conn.Open();
    //参数名得和存储过程的变量名相同（参数可以跳跃传，键值对方式即可）
    //动态类型
    //var list = conn.Query("usp_test", new { aId = 11 }, commandType: CommandType.StoredProcedure);
    //强类型
    var  list = conn.Query<TitleAndKeyWords>( "usp_test" ,  new  { aId = 11 }, commandType: CommandType.StoredProcedure);
    foreach  ( var  item  in  list)
    {
        Console.WriteLine(item.Id +  " | "  + item.SeoKeywords +  " | ："  + item.Title);
    }
}

//插入
using  (SqlConnection conn =  new  SqlConnection(connStr))
{
    conn.Open();
    int  count = conn.Execute( "usp_insertArticle" ,  new  { title =  "Title11" , content =  "TContent1" , author =  "毒逆天"  }, commandType: CommandType.StoredProcedure);
    if  (count > 0)
    {
        Console.WriteLine(count +  "条操作成功" );
    }
}

//更新
using  (SqlConnection conn =  new  SqlConnection(connStr))
{
    conn.Open();
    int  count = conn.Execute( "usp_updateArticle" ,  new  { id = 276, title =  "Dapper使用"  }, commandType: CommandType.StoredProcedure);
    if  (count > 0)
    {
        Console.WriteLine(count +  "条操作成功" );
    }
}

　　

 

　

 出处：http://dunitian.cnblogs.com/

作者： 毒逆天