C# 事务处理

前言：

      通常SqlHelper类为了方便处理，做成了静态类，静态类的问题是不方便添加事务处理。

      实例化类方便添加事务处理，DoTrans/CommitTrans/RollBackTrans  三个函数

说明：

1：ExecuteNonQuery执行多条SQL语句，默认包含事务。

实际执行代码：

SqlServerInfo ssi = new SqlServerInfo();
            string strSql="UPDATE dbo.Test SET testname='2321' WHERE testid=1;UPDATE dbo.TestCustorm SET TestNickName='Nick2321' WHERE testid=1;";
            //string strsql1 = "UPDATE dbo.TestCustorm SET TestNickName='Nick2321' WHERE testid=1;";
            //string strsql2 = "UPDATE dbo.Test SET testname='2321' WHERE testid=1";
            int i=ssi.ExecuteNonQuerySqlTextWithNoTrans(strSql);
            if(i>0)
            {
                Response.Write("执行成功");
            }
            else
            {
                Response.Write("执行失败");
            }

SQL执行代码：

public class SqlServerInfo
    {
        private string _SqlConnectionString = "Data Source=(local);Initial Catalog=test;User ID=sa;Password=sasa;";
        public string SqlConnectionString
        {
            get
            {
                return _SqlConnectionString;
            }
            set
            {
                _SqlConnectionString = value;
            }
        }

        /// <summary>
        /// 执行sql语句并返回受影响行数
        /// </summary>
        /// <param name="cmdText">sql语句</param>
        /// <returns></returns>
        public int ExecuteNonQuerySqlTextWithTrans(string cmdText)
        {
            int num2=0;
            SqlConnection connection = new SqlConnection(_SqlConnectionString);
            connection.Open();
            SqlCommand cmd = new SqlCommand();
            SqlTransaction sTran = connection.BeginTransaction();
            try
            {
                PrepareCommand(cmd, connection, sTran, CommandType.Text, cmdText, null);
                num2 = cmd.ExecuteNonQuery();
                cmd.Parameters.Clear();
                sTran.Commit();
                connection.Close();

            }
            catch (Exception ex)
            {
                //LogHelper log = new LogHelper();
                //log.WriteLog("时间:" + DateTime.Now.ToString() + "----错误消息：" + ex.Message);
                sTran.Rollback();
            }
            return num2;
        }

        /// <summary>
        /// 执行sql语句并返回受影响行数
        /// </summary>
        /// <param name="cmdText">sql语句</param>
        /// <returns></returns>
        public int ExecuteNonQuerySqlTextWithNoTrans(string cmdText)
        {
            int num2 = 0;
            SqlConnection connection = new SqlConnection(_SqlConnectionString);
            connection.Open();
            SqlCommand cmd = new SqlCommand();
            try
            {
                PrepareCommand(cmd, connection, null, CommandType.Text, cmdText, null);
                num2 = cmd.ExecuteNonQuery();
                cmd.Parameters.Clear();
                connection.Close();

            }
            catch (Exception ex)
            {

            }
            return num2;
        }


        /// <summary>
        /// Command准备
        /// </summary>
        /// <param name="cmd"></param>
        /// <param name="conn"></param>
        /// <param name="isOpenTrans"></param>
        /// <param name="cmdType"></param>
        /// <param name="cmdText"></param>
        /// <param name="cmdParms"></param>
        private void PrepareCommand(SqlCommand cmd, SqlConnection conn, SqlTransaction isOpenTrans, CommandType cmdType, string cmdText, SqlParameter[] cmdParms)
        {
            if (conn.State != ConnectionState.Open)
            {
                conn.Open();
            }
            cmd.Connection = conn;
            cmd.CommandText = cmdText;
            if (isOpenTrans != null)
            {
                cmd.Transaction = isOpenTrans;
            }
            cmd.CommandType = cmdType;
            if (cmdParms != null)
            {
                cmd.Parameters.AddRange(cmdParms);
            }
        }
    }

2：分割执行包含事务

执行语句：

protected void Button1_Click(object sender, EventArgs e)
        {
            SqlServerInfo ssi = new SqlServerInfo();
            int iSeed = 3;
            Random ran = new Random(iSeed);
            int RandKey=ran.Next(100,999);
            string strSql = "UPDATE dbo.Test SET testname='" + RandKey.ToString() + "' WHERE testid=1;UPDATE dbo.TestCustorm SET TestNickName1='Nick" + RandKey.ToString() + "' WHERE testid=1";
            //string strsql1 = "UPDATE dbo.TestCustorm SET TestNickName='Nick2321' WHERE testid=1;";
            //string strsql2 = "UPDATE dbo.Test SET testname='2321' WHERE testid=1";
            int i=ssi.ExecuteNonQuerySqlTextWithNoTrans(strSql);
            if(i>0)
            {
                Response.Write("执行成功");
            }
            else
            {
                Response.Write("执行失败");
            }

        }

        protected void Button2_Click(object sender, EventArgs e)
        {
            SqlServerInfo ssi = new SqlServerInfo();
            int iSeed = 4;
            Random ran = new Random(iSeed);
            int RandKey = ran.Next(1000, 9999);
            string strSql = "UPDATE dbo.Test SET testname='" + RandKey.ToString() + "' WHERE testid=1;UPDATE dbo.TestCustorm SET TestNickName1='Nick" + RandKey.ToString() + "' WHERE testid=1";
            //string strsql1 = "UPDATE dbo.TestCustorm SET TestNickName='Nick2321' WHERE testid=1;";
            //string strsql2 = "UPDATE dbo.Test SET testname='2321' WHERE testid=1";
            int i = ssi.ExecuteNonQuerySqlTextWithTrans(strSql);
            if (i > 0)
            {
                Response.Write("执行成功");
            }
            else
            {
                Response.Write("执行失败");
            }

        }

处理代码：

public class SqlServerInfo
    {
        private string _SqlConnectionString = "Data Source=(local);Initial Catalog=test;User ID=sa;Password=sasa;";
        public string SqlConnectionString
        {
            get
            {
                return _SqlConnectionString;
            }
            set
            {
                _SqlConnectionString = value;
            }
        }

        /// <summary>
        /// 执行sql语句并返回受影响行数
        /// </summary>
        /// <param name="cmdText">sql语句</param>
        /// <returns></returns>
        public int ExecuteNonQuerySqlTextWithTrans(string cmdText)
        {
            int num2=0;
            SqlConnection connection = new SqlConnection(_SqlConnectionString);
            connection.Open();
            SqlCommand cmd = new SqlCommand();
            SqlTransaction sTran = connection.BeginTransaction();
            try
            {
                string[] sqlContexts= cmdText.Split(';');
                foreach(string sql in sqlContexts)
                {
                    PrepareCommand(cmd, connection, sTran, CommandType.Text, cmdText, null);
                    num2 = cmd.ExecuteNonQuery();
                    cmd.Parameters.Clear();
                }
                sTran.Commit();
                connection.Close();

            }
            catch (Exception ex)
            {
                //LogHelper log = new LogHelper();
                //log.WriteLog("时间:" + DateTime.Now.ToString() + "----错误消息：" + ex.Message);
                sTran.Rollback();
            }
            return num2;
        }

        /// <summary>
        /// 执行sql语句并返回受影响行数
        /// </summary>
        /// <param name="cmdText">sql语句</param>
        /// <returns></returns>
        public int ExecuteNonQuerySqlTextWithNoTrans(string cmdText)
        {
            int num2 = 0;
            SqlConnection connection = new SqlConnection(_SqlConnectionString);
            connection.Open();
            SqlCommand cmd = new SqlCommand();
            try
            {
                string[] sqlContexts= cmdText.Split(';');
                foreach(string sql in sqlContexts)
                {
                    PrepareCommand(cmd, connection, null, CommandType.Text, sql, null);
                    num2 = cmd.ExecuteNonQuery();
                    cmd.Parameters.Clear();
                }
                
                connection.Close();

            }
            catch (Exception ex)
            {

            }
            return num2;
        }


        /// <summary>
        /// Command准备
        /// </summary>
        /// <param name="cmd"></param>
        /// <param name="conn"></param>
        /// <param name="isOpenTrans"></param>
        /// <param name="cmdType"></param>
        /// <param name="cmdText"></param>
        /// <param name="cmdParms"></param>
        private void PrepareCommand(SqlCommand cmd, SqlConnection conn, SqlTransaction isOpenTrans, CommandType cmdType, string cmdText, SqlParameter[] cmdParms)
        {
            if (conn.State != ConnectionState.Open)
            {
                conn.Open();
            }
            cmd.Connection = conn;
            cmd.CommandText = cmdText;
            if (isOpenTrans != null)
            {
                cmd.Transaction = isOpenTrans;
            }
            cmd.CommandType = cmdType;
            if (cmdParms != null)
            {
                cmd.Parameters.AddRange(cmdParms);
            }
        }
    }