Dapper的牛逼就不扯蛋了，答應(yīng)群友做個入門Demo的，現(xiàn)有園友需要，那么公開分享一下：

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

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

平臺之大勢何人能擋？ 帶著你的Net飛奔吧！

http://www.cnblogs.com/dunitian/p/4822808.html#skill

擴(kuò)展篇：http://www.cnblogs.com/dunitian/p/5710382.html

先安裝一下Dapper（建議用nuget包來管理）

連接字符串：

string connStr = "Data Source=.;Initial Catalog=DapperDB;User ID=用戶名;Password=密碼";

強(qiáng)類型：

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

#region 強(qiáng)類型 ????????????//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(); ????????????????//無參查詢 ????????????????//var qqModeList = conn.Query<QQModel>("select Id,Name,Count from QQModel"); ????????????????//帶參查詢 ????????????????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

動態(tài)類型：

1 2 3 4 5 6 7 8 9 10 11 12 13

#region 動態(tài)類型 ????????????逆天動態(tài)類型用的比較多[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：

1 2 3 4 5 6 7 8 9 10 11 12

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：

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

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 =?"打代碼", status = 99 })) ????{ ????????//multi.IsConsumed?? reader的狀態(tài) ，true 是已經(jīng)釋放 ????????if?(!multi.IsConsumed) ????????{ ????????????//注意一個東西，Read獲取的時候必須是按照上面返回表的順序 （article，qqmodel，seotkd） ????????????//強(qiáng)類型 ????????????var?articleList = multi.Read<Temp>();//類不見得一定得和表名相同 ????????????var?QQModelList = multi.Read<QQModel>(); ????????????var?SeoTKDList = multi.Read<SeoTKD>(); ????????????//動態(tài)類型 ????????????//var articleList = multi.Read(); ????????????//var QQModelList = multi.Read(); ????????????//var SeoTKDList = multi.Read(); ????????????#region 輸出 ????????????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 ????????} ????} }

　增刪改查：（刪項目里面基本上不用）

1 2 3 4 5 6 7 8 9 10 11 12 13

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 = "么么噠", id = 274 }); ????if?(count > 0) ????{ ????????Console.WriteLine(count +?"條操作成功"); ????} }

存儲過程：

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36

//查詢 using?(SqlConnection conn =?new?SqlConnection(connStr)) { ????conn.Open(); ????//參數(shù)名得和存儲過程的變量名相同（參數(shù)可以跳躍傳，鍵值對方式即可） ????//動態(tài)類型 ????//var list = conn.Query("usp_test", new { aId = 11 }, commandType: CommandType.StoredProcedure); ????//強(qiáng)類型 ????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 +?"條操作成功"); ????} } //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 +?"條操作成功"); ????} }

事物的使用：

先看看ADO.Net怎么用的

using (SqlConnection conn = new SqlConnection(connStr)){string sql = @"insert into SeoTKD values(N'毒逆天，測試', N'測試測試測試', 1) insert into SeoTKD values(N'毒逆天，測試', N'測試測試測試', 1) insert into SeoTKD values(N'毒逆天，測試', N'測試測試測試', 1) insert into SeoTKD values(N'毒逆天，測試', N'測試測試測試', 999999999999999999999999) insert into SeoTKD values(N'毒逆天，測試', N'測試測試測試', 1) insert into SeoTKD values(N'毒逆天，測試', N'測試測試測試', 1) ";using (SqlCommand cmd = new SqlCommand(sql, conn)){conn.Open();cmd.Transaction = conn.BeginTransaction();try{int i = cmd.ExecuteNonQuery();
cmd.Transaction.Commit();Console.WriteLine(i);}catch (Exception ex){cmd.Transaction.Rollback();Console.WriteLine(ex);}}}

再看看Dapper的

using (SqlConnection conn = new SqlConnection(connStr)){string sql = @"insert into SeoTKD values(N'毒逆天，測試', N'測試測試測試', 1) insert into SeoTKD values(N'毒逆天，測試', N'測試測試測試', 1) insert into SeoTKD values(N'毒逆天，測試', N'測試測試測試', 1) insert into SeoTKD values(N'毒逆天，測試', N'測試測試測試', 9999999999999999999) insert into SeoTKD values(N'毒逆天，測試', N'測試測試測試', 1) insert into SeoTKD values(N'毒逆天，測試', N'測試測試測試', 1) ";conn.Open();var transaction = conn.BeginTransaction();try{int i = conn.Execute(sql, transaction: transaction);transaction.Commit();Console.WriteLine(i);}catch (Exception ex){transaction.Rollback();Console.WriteLine(ex);}}

?

?

本文轉(zhuǎn)自毒逆天博客園博客，原文鏈接：http://www.cnblogs.com/dunitian/p/5226265.html，如需轉(zhuǎn)載請自行聯(lián)系原作者

總結(jié)

以上是生活随笔為你收集整理的Dapper逆天入门~强类型，动态类型，多映射，多返回值，增删改查+存储过程+事物案例演示...的全部內(nèi)容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網(wǎng)站內(nèi)容還不錯，歡迎將生活随笔推薦給好友。