DAPPER 事務 TRANSACTION

https://www.cnblogs.com/friend/p/16754184.html\

 

public async Task<int> Save(long moldProducedProductId, List<MoldStandardResource> list)
 {
   int result = 0;
   string delSql = "Delete MoldStandardResource Where MoldProducedProductId=@moldProducedProductId";
   string InsertSql = "INSERT INTO [dbo].[MoldStandardResource] ([Id],[MoldProducedProductId],[ProjectCategoryId],[CustomValue],[Description],[UserId],[UpdateDate])VALUES(@Id,@MoldProducedProductId,@ProjectCategoryId,@CustomValue,@Description,@UserId,@UpdateDate)";
   using var conn = _dapperContext.CreateConnection();
   conn.Open();
   using (var transaction = conn.BeginTransaction())
   {
     try
     {
       result = await conn.ExecuteAsync(delSql, new { moldProducedProductId }, transaction);
 
       foreach (var detail in list)
       {
         await conn.ExecuteAsync(InsertSql, detail, transaction);
       }
       transaction.Commit();
     }
     catch
     {
       transaction.Rollback();
       throw;
     }
     finally
     {
       conn?.Close();
     }
   }
   return result;
 }

　　

Dapper - Transaction​
交易是如此的重要，Dapper當然也不會忘記。

• TransactionScope

 

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//Transaction using (SqlConnection conn = new SqlConnection(strConnection)) {     string strSql = " UPDATE Users SET col1=@c1 WHERE col2=@c2" ;     dynamic datas = new []{ new { c1 = "A", c2 = "A2" }                 , new { c1 = "B", c2 = "B2" }                 , new { c1 = "C", c2 = "C2" }};     //交易     using(var tran = conn.BeginTransaction())     {         conn.Execute( strSql, datas);         tran.Commit();     } }

　　單一資料庫時建議使用(效能較好)。

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//TransactionScope //加入參考 using System.Transactions;   //交易 using(var tranScope = new TransactionScope()) {     using (SqlConnection conn = new SqlConnection(strConnection))     {         string strSql = " UPDATE Users SET col1=@c1 WHERE col2=@c2" ;         dynamic datas = new []{ new { c1 = "A", c2 = "A2" }                     , new { c1 = "B", c2 = "B2" }                     , new { c1 = "C", c2 = "C2" }};         conn.Execute( strSql, datas);     }     tranScope.Complete(); }

　　用於異質資料庫交易。

參考：https://dotblogs.com.tw/OldNick/2018/01/15/Dapper#Dapper%20-%20Transaction