mysql bulk大批量入库操作

数据库批量插入Oracle中有 OracleBulkCopy,SQL当然也有个SqlBulkCopy .这里有介绍就不说，网上有非常详细的例子，大家可去搜索下，可是MySql确没有MySqlBulkCopy这个，网上找了很久也没找到。找到了一个 MySqlBulkLoader

   /// <summary>
        /// 批量插入
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="db"></param>
        /// <param name="dataList"></param>
        /// <returns></returns>
        public static ValidateResult BulkInsert<T>(List<T> dataList)
        {
            int insertCount = 0;
            ValidateResult result = new ValidateResult();
            if (dataList == null || dataList.Count == 0)
            {
                result.Success = true;
                result.Info = "传入的dataList没有数据";
                return result;
            }
            string[] tableNames = typeof(T).ToString().Split('.');
            string tableName = tableNames[tableNames.Length - 1];
            string tmpPath = AppDomain.CurrentDomain.BaseDirectory + SystemUtil.OsPathSplitChar + "InTemp";
            if (!Directory.Exists(tmpPath))
            {
                Directory.CreateDirectory(tmpPath);
            }
            //csv文件临时目录
            tmpPath = Path.Combine(tmpPath, tableName + "_Temp_" + Guid.NewGuid().ToString("N") + ".csv");
            List<PropertyInfo> propertys = dataList[0].GetType().GetProperties().Where(c => c.PropertyType.Namespace == "System").ToList();
            string csv = ListToCsv(dataList, propertys);
            File.WriteAllText(tmpPath, csv);
            string connString = System.Configuration.ConfigurationManager.ConnectionStrings["AssessConnection"].ToString();
            using (MySqlConnection conn = new MySqlConnection(connString))
            {
                try
                {
                    Stopwatch stopwatch = new Stopwatch();
                    stopwatch.Start();
                    conn.Open();
                    MySqlBulkLoader bulk = new MySqlBulkLoader(conn)
                    {
                        CharacterSet = "UTF8",
                        FieldTerminator = ",",
                        FieldQuotationCharacter = '"',
                        EscapeCharacter = '"',
                        LineTerminator = SystemUtil.IsLinux() ? "\n" : "\r\n",
                        FileName = tmpPath,
                        NumberOfLinesToSkip = 0,
                        TableName = tableName,
                    };
                    bulk.Columns.AddRange(propertys.Select(c => c.Name).ToList());//根据标题列对应插入
                    insertCount = bulk.Load();
                    stopwatch.Stop();
                    if (insertCount > 0)
                    {
                        result.Success = true;
                        result.Info = "提交成功";
                    }
                    else
                    {
                        result.Success = false;
                        result.Info = "提交失败";
                    }
                }
                catch (MySqlException ex)
                {
                    result.Success = true;
                    result.Info = "插入内部错误" + ex.ToString();
                    return result;
                }
            }
            //File.Delete(tmpPath);
            return result;
        }

        /// <summary>
        /// list转csv
        /// </summary>
        /// <param name="list"></param>
        /// <param name="propertys"></param>
        /// <returns></returns>
        private static string ListToCsv(IList list, List<PropertyInfo> propertys)
        {
            StringBuilder sb = new StringBuilder();
            foreach (var item in list)
            {
                for (int i = 0; i < propertys.Count; i++)
                {
                    var prop = propertys[i];
                    if (i != 0) sb.Append(",");
                    string val = Convert.ToString(prop.GetValue(item, null));
                    if (prop.PropertyType == typeof(bool))
                    {
                        val = val == "True" ? "1" : "0";
                        sb.Append(val);
                    }
                    else if (prop.PropertyType == typeof(DateTime))
                    {
                        val = Convert.ToDateTime(val).ToString("yyyy-MM-dd HH:mm:ss");
                        sb.Append(val);
                    }
                    else if (prop.PropertyType == typeof(DateTime?))
                    {
                        if (val == null)
                        {
                            val = "Null";
                            sb.Append(val);
                        }
                        else
                        {
                            val = Convert.ToDateTime(val).ToString("yyyy-MM-dd HH:mm:ss");
                            sb.Append(val);
                        }
                    }
                    else if (prop.PropertyType == typeof(string) && val.Contains(","))
                    {
                        sb.Append("\"" + val.Replace("\"", "\"\"") + "\"");
                    }
                    else
                    {
                        sb.Append(val);
                    }
                }
                sb.AppendLine();
            }
            return sb.ToString();
        }