ADO.NET 对数据操作 以及如何通过C# 事务批量导入数据

ADO.NET 对数据操作 以及如何通过C# 事务批量导入数据

 

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public static class SQLHelper     {         static string connString = ConfigurationManager.ConnectionStrings["connString"].ToString();         /// <summary>         /// 执行增删改         /// </summary>         /// <param name="sql"></param>         /// <returns></returns>         public static int Update(string sql)         {             SqlConnection conn = new SqlConnection(connString);             SqlCommand cmd = new SqlCommand(sql, conn);             try             {                 conn.Open();                 return cmd.ExecuteNonQuery();             }             catch (Exception ex)             {                 throw new Exception(ex.Message);             }             finally             {                 conn.Close();             }         }         /// <summary>         /// 执行单一结果查询         /// </summary>         /// <param name="sql"></param>         /// <returns></returns>         public static object GetSingleResult(string sql)         {             SqlConnection conn = new SqlConnection(connString);             SqlCommand cmd = new SqlCommand(sql, conn);             try             {                 conn.Open();                 return cmd.ExecuteScalar();             }             catch (Exception ex)             {                 throw new Exception(ex.Message);             }             finally             {                 conn.Close();             }         }           /// <summary>         /// 执行一个结果集查询         /// </summary>         /// <param name="sql"></param>         /// <returns></returns>         public static SqlDataReader GetReader(string sql)         {             SqlConnection conn = new SqlConnection(connString);             SqlCommand cmd = new SqlCommand(sql, conn);             try             {                 conn.Open();                 return cmd.ExecuteReader(CommandBehavior.CloseConnection);             }             catch (Exception ex)             {                 conn.Close();                 throw new Exception(ex.Message);             }         }           /// <summary>         /// 执行返回数据集的查询         /// </summary>         /// <param name="sql"></param>         /// <returns></returns>         public static SqlDataAdapter GetDataSet(string sql)         {             SqlConnection conn = new SqlConnection(connString);             SqlCommand cmd = new SqlCommand(sql, conn);             //创建适配器对象             SqlDataAdapter da = new SqlDataAdapter(cmd);             DataSet ds = new DataSet();               try             {                 conn.Open();                 da.Fill(ds);//使用数据适配器填充数据集                 return da;             }             catch (Exception ex)             {                 throw new Exception(ex.Message);             }             finally             {                 conn.Close();             }         }     }

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/// <summary> /// 启用事务执行多条sql语句 /// </summary> /// <param name="sqlList">插入的sql语句</param> /// <returns></returns> public static bool UpdateByTran(List<string> sqlList) {     SqlConnection conn = new SqlConnection(connString);     SqlCommand cmd = new SqlCommand();     cmd.Connection=conn;     try     {         conn.Open();         cmd.Transaction = conn.BeginTransaction();         foreach (string itemSql in sqlList)         {             cmd.CommandText = itemSql;             cmd.ExecuteNonQuery();         }         cmd.Transaction.Commit();         return true;     }     catch (Exception ex)     {         if (cmd.Transaction != null)         {             cmd.Transaction.Rollback();         }         throw new Exception("调用事务出错" + ex.Message);     }     finally {         if (cmd.Transaction!=null)         {             cmd.Transaction = null;         }         conn.Close();     } }

　　

对数据库操作的常用方法