dapper支持操作函数和事物

dapper除了支持基础的CURD、存储过程以外，还支持操作函数和事物。

dapper操作函数的代码如下：

 1 using Dapper;
 2 using System;
 3 using System.Collections.Generic;
 4 using System.Configuration;
 5 using System.Data;
 6 using System.Data.SqlClient;
 7 using System.Linq;
 8 using System.Text;
 9 using System.Threading.Tasks;
10 
11 namespace DapperDemo
12 {
13     public static class OperFunction
14     {
15         /// <summary>
16         /// Dapper滴调用函数
17         /// </summary>
18         public static void ExecuteFunction()
19         {
20             // 连接字符串
21             string strCon = ConfigurationManager.ConnectionStrings["DbConnection"].ConnectionString;
22             // connection对象
23             IDbConnection dbConnection = new SqlConnection(strCon);
24             // 定义参数
25             DynamicParameters paras = new DynamicParameters();
26             paras.Add("@num1", 34);
27             paras.Add("@num2", 456);
28             // 返回值
29             paras.Add("@sum", 0, DbType.Int32, ParameterDirection.ReturnValue);
30             string functionName = "fun_test";
31             // 执行
32             int count = dbConnection.Execute(functionName, paras, null, null, CommandType.StoredProcedure);
33             // 获取输出参数的值
34             int sum = paras.Get<int>("@sum");
35             Console.WriteLine("sum:" + sum);//输出390
36         }
37     }
38 }

 dapper支持事物的代码如下：

 1 using Dapper;
 2 using System;
 3 using System.Collections.Generic;
 4 using System.Configuration;
 5 using System.Data;
 6 using System.Data.SqlClient;
 7 using System.Linq;
 8 using System.Text;
 9 using System.Threading.Tasks;
10 
11 namespace DapperDemo
12 {
13     public static class OperTransaction
14     {
15         /// <summary>
16         /// Dapper支持事物
17         /// </summary>
18         public static void ExecuteTransaction()
19         {
20             // 连接字符串
21             string strCon = ConfigurationManager.ConnectionStrings["DbConnection"].ConnectionString;
22             // connection对象
23             IDbConnection dbConnection = new SqlConnection(strCon);
24             string strSQL = "DELETE FROM Student WHERE StudentID=@StudentID";
25             DynamicParameters paras = new DynamicParameters();
26             paras.Add("@StudentID", 3);
27             // 在BeginTransaction之前要打开连接，否则报错：无效操作，连接已关闭
28             dbConnection.Open();
29             // 开启事物
30             IDbTransaction transaction = dbConnection.BeginTransaction();
31             try
32             {
33                 dbConnection.Execute(strSQL, paras, transaction: transaction);
34                 // 提交事务
35                 transaction.Commit();
36             }
37             catch (Exception ex)
38             {
39                 // 回滚事物
40                 transaction.Rollback();
41             }
42         }
43     }
44 }