C#关于Access大数据量的导入

    private void ExcuteListSQL(string tableName, List<List<SqlCondition>> conditionList)
        {
            string[] columns = conditionList[0].Select(t => t.ColumnName).ToList().ToArray();
            string insertSql = DB.GetInsertSQL(tableName, columns);
            insertSql = insertSql.Replace("?", "@");
            using (OleDbTransaction trans = conn.BeginTransaction())
            {
                OleDbCommand cmd = new OleDbCommand();
                cmd.Connection = conn;
                cmd.Transaction = trans;
                try
                {
                    foreach (var one in conditionList)
                    {
                        cmd.CommandText = insertSql;
                        one.ForEach(t =>
                        {
                            cmd.Parameters.Add(new OleDbParameter("@" + t.ColumnName, t.Value));
                        });
                        cmd.ExecuteNonQuery();
                        cmd.Parameters.Clear();
                    }
                    trans.Commit();
                }
                catch (Exception ex)
                {
                    trans.Rollback();
                    throw ex;
                }
            }
        }

public class SqlCondition
{
       public string ColumnName { get; set; }
       public object Value { get; set; }
}

 public void ExcuteTableSql(string tableName, DataTable dt)
        {
            List<string> columnList = new List<string>();
            foreach (DataColumn one in dt.Columns)
            {
                columnList.Add(one.ColumnName);
            }
            OleDbDataAdapter adapter = new OleDbDataAdapter();
            adapter.SelectCommand = new OleDbCommand("select * from " + tableName, conn);
            using (OleDbCommandBuilder builder = new OleDbCommandBuilder(adapter))
            {
                adapter.InsertCommand = builder.GetInsertCommand();
                foreach (string one in columnList)
                {
                    adapter.InsertCommand.Parameters.Add(new OleDbParameter(one, dt.Columns[one].DataType));
                }
                adapter.Update(dt);
            }
        }