启用事务操作，解决批量插入或更新sqlite，mssql等数据库耗时问题

                    private void button1_Click(object sender, EventArgs e)
        {
            
            //
            Sqlite使用事务批量操作 极大的提高速度
            
            DateTime starttime =DateTime.Now;
            using (SQLiteConnection con = new SQLiteConnection(connStr))
            {
                con.Open();
                DbTransaction trans = con.BeginTransaction();//开始事务     
                SQLiteCommand cmd = new SQLiteCommand(con);
                try
                {
                    cmd.CommandText = "INSERTINTO MyTable(username,useraddr,userage) VALUES(@a,@b,@c)";
                    for (int n =0; n <100000; n++)
                    {
                        cmd.Parameters.Add(new SQLiteParameter("@a", DbType.String)); //MySql 使用MySqlDbType.String
                        cmd.Parameters.Add(new SQLiteParameter("@b", DbType.String)); //MySql 引用MySql.Data.dll
                        cmd.Parameters.Add(new SQLiteParameter("@c", DbType.String));
                        cmd.Parameters["@a"].Value = "张三" + n;
                        cmd.Parameters["@b"].Value = "深圳" + n;
                        cmd.Parameters["@c"].Value =10+ n;
                        cmd.ExecuteNonQuery();
                    }
                    trans.Commit();//提交事务  
                    DateTime endtime =DateTime.Now;
                    MessageBox.Show("插入成功，用时" + (endtime - starttime).TotalMilliseconds);

                }
                catch(Exception ex)
                {
                    MessageBox.Show(ex.Message);
                }
            }
        }

//MySql 事务批量提交 极大提交速度
try
{
    using (MySqlConnection con = new MySqlConnection(MySqlStr))
    {
    con.Open();
    DbTransaction trans = con.BeginTransaction();//开始事务  

    #region 防重复先删除
    //循环本地Sqlite数据库数据
    for (int i =0; i <count; i++)
    {
        DataRow dr = ds.Tables[0].Rows[i];
        string sqlDelete = "deletefrom packect where proimei=@d";
        MySqlCommand cmd1 = new MySqlCommand(sqlDelete, con);                           
        cmd1.Parameters.Add(new MySqlParameter("@d", MySqlDbType.String));
        cmd1.Parameters["@d"].Value = dr["proimei"];
        cmd1.ExecuteNonQuery();
    }
    #endregion


    #region 新增数据
    //循环本地Sqlite数据库数据
    for (int i =0; i <count; i++)
    {
        DataRow dr = ds.Tables[0].Rows[i];
        string sqlInsert = "insertinto packect(proimei, prokg, proadddate) values(@a,@b,@c)";
        MySqlCommand cmd2 = new MySqlCommand(sqlInsert, con);  
        cmd2.Parameters.Add(new MySqlParameter("@a", MySqlDbType.String));
        cmd2.Parameters.Add(new MySqlParameter("@b", MySqlDbType.Decimal));
        cmd2.Parameters.Add(new MySqlParameter("@c", MySqlDbType.DateTime));
        cmd2.Parameters["@a"].Value = dr["proimei"];
        cmd2.Parameters["@b"].Value = dr["prokg"];
        cmd2.Parameters["@c"].Value = dr["proadddate"];
        cmd2.ExecuteNonQuery();
    }
    #endregion

    trans.Commit();//提交事务    
    DateTime endtime =DateTime.Now;
    MessageBox.Show("上传数据成功，用时" + (endtime - starttime).TotalMilliseconds + "毫秒！");
    //清空本地数据库
    SQLiteHelper.ExecuteNonQuery(connStr, "deletefrom table1", CommandType.Text);
    }
}
catch (Exception ex)
{
    MessageBox.Show(ex.Message);
}


    /*
        DataTable dt = new DataTable();
        //定义需要插入的字段，字段名需跟数据库字段保持一致
        dt.Columns.Add("username");
        dt.Columns.Add("useraddr");
        dt.Columns.Add("userage");
        for (int i = 0; i < 10000; i++)
        {
            dt.Rows.Add("张三" + i, "深圳" + i, i);
        }
        DateTime starttime = DateTime.Now;
        SqlBulkCopyInsert(dt, "mytable");
        DateTime endtime = DateTime.Now;
        Response.Write("插入成功，用时" + (endtime - starttime).TotalSeconds + "秒");     
     *////<summary>/// 使用SqlBulkCopy批量插入，只限SQLServer,超大数据量快速导入     
    ///</summary>///<param name="table">填充的DataTable,支持其它数据源，请看重载</param>///<param name="tableName">数据库对应表名</param>public void SqlBulkCopyInsert(DataTable table, string tableName)
    {
        SqlBulkCopy sbc = new SqlBulkCopy(MSCL.Until.GetApp("SqlConnStr"));
        sbc.DestinationTableName = tableName;

        for (int i =0; i <table.Columns.Count; i++)
        {
            sbc.ColumnMappings.Add(table.Columns[i].ColumnName, table.Columns[i].ColumnName);
        }
        sbc.WriteToServer(table);
    } 

    ///<summary>/// 使用SqlBulkCopy批量插入，只限SQLServer,超大数据量快速导入  
    /// 缺点，没有返回行数  
    ///</summary>///<param name="table">填充的DataTable,支持其它数据源，请看重载</param>///<param name="tableName">数据库对应表名</param>///<param name="columns">插入表对应的列名集合</param>public void SqlBulkCopyInsert(DataTable table, string tableName, string[] columns)
    {
        SqlBulkCopy sbc = new SqlBulkCopy("接连字符串");
        sbc.DestinationTableName = tableName;
        foreach (string col in columns)
        {
            sbc.ColumnMappings.Add(col, col);
        }
        sbc.WriteToServer(table);
    }


    ///<summary>/// 多行插入,Connection/Command/DataAdapter看你连接的数据库类型  
    /// 进行相应的替换即可  
    ///</summary>///<param name="ds">填充数据后的数据集</param>///<returns>受影响行数</returns>publicint MultyInsert(DataSet ds)
    {
        int result =0;
        IDbConnection con = new OracleConnection("连接字符串");
        con.Open();
        IDbCommand cmd = new OracleCommand();
        cmd.CommandText = "Insertinto Member(UserName,Password) values(@name,@password)";
        IDbDataParameter namePar = cmd.CreateParameter();
        namePar.ParameterName = "@name";
        namePar.SourceColumn = "UserName";
        namePar.SourceVersion = DataRowVersion.Original;
        namePar.DbType = DbType.String;
        cmd.Parameters.Add(namePar);

        IDbDataParameter passPar = cmd.CreateParameter();
        passPar.ParameterName = "@pass";
        passPar.DbType = DbType.String;
        passPar.SourceColumn = "Password";
        passPar.SourceVersion = DataRowVersion.Original;
        cmd.Parameters.Add(passPar);

        IDbDataAdapter adpt = new OracleDataAdapter();
        adpt.InsertCommand = cmd;
        try
        {
            result = adpt.Update(ds);
        }
        catch (Exception)
        {

            throw;
        }
        finally
        {
            con.Close();
        }
        return result;
    }  

/*
 * Oracle中非常强大快速的数据批量操作方法
*/////引用
//using System.Data;
//using System.Data.OracleClient;
//using Oracle.DataAccess.Client; //Oracle自带数据访问组件 位置： $Oracle安装路径$/bin/Oracle.DataAccess.dll
//设置一个数据库的连接串
string connectStr = "User Id=scott;Password=tiger;Data Source=";
OracleConnection conn = new OracleConnection(connectStr);
OracleCommand command = new OracleCommand();
command.Connection = conn;
//到此为止，还都是我们熟悉的代码，下面就要开始喽
//这个参数需要指定每次批插入的记录数
int recc =10000000;
command.ArrayBindCount = recc;
//在这个命令行中,用到了参数,参数我们很熟悉,但是这个参数在传值的时候
//用到的是数组,而不是单个的值,这就是它独特的地方
command.CommandText = "insertinto dept values(:deptno, :deptname, :loc)";
conn.Open();
//下面定义几个数组,分别表示三个字段,数组的长度由参数直接给出
int[] deptNo = new int[recc];
string[] dname = new string[recc];
string[] loc = new string[recc];
// 为了传递参数,不可避免的要使用参数,下面会连续定义三个
// 从名称可以直接看出每个参数的含义,不在每个解释了
OracleParameter deptNoParam = new OracleParameter("deptno", OracleType.Int32);
deptNoParam.Direction =  ParameterDirection.Input;
deptNoParam.Value = deptNo;
command.Parameters.Add(deptNoParam);
OracleParameter deptNameParam = new OracleParameter("deptname", OracleType.VarChar);
deptNameParam.Direction = ParameterDirection.Input;
deptNameParam.Value = dname; command.Parameters.Add(deptNameParam);
OracleParameter deptLocParam = new OracleParameter("loc", OracleType.VarChar);
deptLocParam.Direction = ParameterDirection.Input;
deptLocParam.Value = loc;
command.Parameters.Add(deptLocParam);
//在下面的循环中,先把数组定义好,而不是像上面那样直接生成SQL
for (int i =0; i < recc; i++)
{
    deptNo[i]= i;
    dname[i]= i.ToString();
    loc[i]= i.ToString();
}
//这个调用将把参数数组传进SQL,同时写入数据库
command.ExecuteNonQuery();