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：

 using Dapper;
 using System;
 using System.Collections.Generic;
 using System.Configuration;
 using System.Data;
 using System.Data.SqlClient;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;

 namespace DapperDemo
 {
     public static class OperFunction
     {
         /// <summary>
         /// Dapper滴调用函数
         /// </summary>
         public static void ExecuteFunction()
         {
             // 连接字符串
             string strCon = ConfigurationManager.ConnectionStrings["DbConnection"].ConnectionString;
             // connection对象
             IDbConnection dbConnection = new SqlConnection(strCon);
             // 定义参数
             DynamicParameters paras = new DynamicParameters();
             paras.Add("@num1", );
             paras.Add("@num2", );
             // 返回值
             paras.Add("@sum", , DbType.Int32, ParameterDirection.ReturnValue);
             string functionName = "fun_test";
             // 执行
             int count = dbConnection.Execute(functionName, paras, null, null, CommandType.StoredProcedure);
             // 获取输出参数的值
             int sum = paras.Get<int>("@sum");
             Console.WriteLine("sum:" + sum);//输出390
         }
     }
 }

dapper支持事物的代码如下：

 using Dapper;
 using System;
 using System.Collections.Generic;
 using System.Configuration;
 using System.Data;
 using System.Data.SqlClient;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;

 namespace DapperDemo
 {
     public static class OperTransaction
     {
         /// <summary>
         /// Dapper支持事物
         /// </summary>
         public static void ExecuteTransaction()
         {
             // 连接字符串
             string strCon = ConfigurationManager.ConnectionStrings["DbConnection"].ConnectionString;
             // connection对象
             IDbConnection dbConnection = new SqlConnection(strCon);
             string strSQL = "DELETE FROM Student WHERE StudentID=@StudentID";
             DynamicParameters paras = new DynamicParameters();
             paras.Add("@StudentID", );
             // 在BeginTransaction之前要打开连接，否则报错：无效操作，连接已关闭
             dbConnection.Open();
             // 开启事物
             IDbTransaction transaction = dbConnection.BeginTransaction();
             try
             {
                 dbConnection.Execute(strSQL, paras, transaction: transaction);
                 // 提交事务
                 transaction.Commit();
             }
             catch (Exception ex)
             {
                 // 回滚事物
                 transaction.Rollback();
             }
         }
     }
 }

Dapper除了支持Transaction以外，还支持Transactionscope：

 public static void ExecuteTransactionScope()
 {
       using (var transactionscope = new TransactionScope(TransactionScopeOption.Required))
       {
             // 连接字符串
             string strCon = ConfigurationManager.ConnectionStrings["DbConnection"].ConnectionString;
             // connection对象
             IDbConnection dbConnection = new SqlConnection(strCon);
             string strSQL = "DELETE FROM Student WHERE StudentID=@StudentID";
             DynamicParameters paras = new DynamicParameters();
             paras.Add("@StudentID", );
             dbConnection.Open();
             try
             {
                 dbConnection.Execute(strSQL, paras);
                 transactionscope.Complete();
             }
             catch (Exception ex)
             {
                 // 不提交事务默认自动回滚
                 Console.WriteLine(ex.Message);
             }
       }
 }