CNAS/CnasSynchronusClient/CnasInsertOperation.cs

using CnasSynchronousCommon;
using CnasSynchrousModel;
using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Management;
using System.Net.NetworkInformation;
using System.Text;
using System.Text.RegularExpressions;

namespace CnasSynchronusClient
{
    public class CnasInsertOperation
    {
        /// <summary>
        /// 同步配置信息
        /// </summary>
        public SyncInstrumentItemInfo syncInstrumentItem { get; set; }


        /// <summary>
        /// 创建准备插入到CNAS的数据
        /// </summary>
        /// <param name="dtReadySource"></param>
        /// <param name="dtTarget"></param>
        /// <returns></returns>
        public string CreateInputData(DataTable dtReadySource, ref DataTable dtTarget)
        {
            string strErrorMsg = "";
            string strDateColumn = "";

            try
            {
                //获取日期字段
                strDateColumn = GetDateFieldOperation(ref strErrorMsg);
                if (strErrorMsg != "") return strErrorMsg;

                //新数据行的创建和插入数据
                foreach (DataRow drSource in dtReadySource.Rows)
                {
                    DataRow drNewTarget = dtTarget.NewRow();

                    //根据过滤器执行来源数据过滤
                    AppLog.Info("过滤检测");
                    if (!SourceDataFilterOperation(drSource)) continue;

                    //根据映射字段尝试塞入数据到数据行，排除不合法数据。
                    AppLog.Info("合法性检测");
                    NormalParamsValueInsertOperation(dtReadySource, dtTarget, drSource, drNewTarget, strDateColumn, ref strErrorMsg);
                    if (strErrorMsg != "") break;

                    //根据固定值字段塞入数据到数据行
                    AppLog.Info("条件映射数据更改");
                    FixConditonParamsInsertOperation(dtReadySource, dtTarget, drSource, drNewTarget);

                    //补充仪器信息数据
                    AppLog.Info("补充仪器信息数据");
                    if (syncInstrumentItem.CnasInstrumentColumn == null)
                    {
                        strErrorMsg = "未设置的CNAS仪器信息列，请先配置";
                        break;
                    }
                    // 使用实际的机器码来验证
                    if (dtTarget.Columns.Contains(syncInstrumentItem.CnasInstrumentColumn))
                        drNewTarget[syncInstrumentItem.CnasInstrumentColumn] = syncInstrumentItem.GUID + "@" + GenerateActivationCode(MachieCodeHelper.GetMachineCode());
                    else
                    {
                        strErrorMsg = "设置的CNAS仪器信息列没有在库中找到，请重新配置";
                        break;
                    }

                    //塞入数据的数据行包含到dt中
                    dtTarget.Rows.Add(drNewTarget);
                }
                AppLog.Info("构造数据行循环结束");
            }
            catch (Exception ex)
            {
                AppLog.Error(ex.Message);
                strErrorMsg = ex.Message;
            }
            return strErrorMsg;
        }
        private string GenerateActivationCode(string machineCode)
        {
            // 这里实现激活码生成算法
            // 示例：简单的加密算法，实际应用中应该使用更安全的加密方式
            using (var md5 = System.Security.Cryptography.MD5.Create())
            {
                // 加入时间戳使得生成的激活码具有时效性
                string input = machineCode + DateTime.Now.ToString("yyyyMMdd");
                byte[] inputBytes = Encoding.UTF8.GetBytes(input);
                byte[] hashBytes = md5.ComputeHash(inputBytes);

                // 转换为16进制字符串
                StringBuilder sb = new StringBuilder();
                for (int i = 0; i < hashBytes.Length; i++)
                {
                    sb.Append(hashBytes[i].ToString("X2"));
                    // 每4个字符添加一个分隔符，提高可读性
                    if ((i + 1) % 4 == 0 && i != hashBytes.Length - 1)
                    {
                        sb.Append("-");
                    }
                }
                return sb.ToString();
            }
        }
      
        /// <summary>
        /// 获取日期字段
        /// </summary>
        /// <param name="strErrorMsg"></param>
        /// <returns></returns>
        private string GetDateFieldOperation(ref string strErrorMsg)
        {
            string strDateColumn = "";
            var query = syncInstrumentItem.LstSyncPramas.Where(s => s.IfDateField == true).ToList<SyncParamasInfo>();
            if (query.Count != 1)
            {
                strErrorMsg = "创建CNAS数据行失败，未找到日期字段。";
            }
            else
            {
                strDateColumn = query[0].TargetField;
            }
            return strDateColumn;
        }

        /// <summary>
        /// 普通值（非固定值）插入操作
        /// </summary>
        /// <param name="dtReadySource"></param>
        /// <param name="dtTarget"></param>
        /// <param name="drSource"></param>
        /// <param name="drNewTarget"></param>
        /// <param name="strDateField"></param>
        /// <param name="strErrorMsg"></param>
        private void NormalParamsValueInsertOperation(DataTable dtReadySource, DataTable dtTarget, DataRow drSource, DataRow drNewTarget, string strDateField, ref string strErrorMsg)
        {
            foreach (var item in syncInstrumentItem.LstSyncPramas)
            {
                var strSourceField = item.SourceField;
                var strTargetField = item.TargetField;

                //当列名存在于数据表中时才能继续
                if (dtReadySource.Columns.Contains(strSourceField) && dtTarget.Columns.Contains(strTargetField))
                {
                    strErrorMsg = TestConvertValueToTarget(drNewTarget, drSource, strTargetField, strSourceField, strDateField);
                    if (strErrorMsg != "")
                    {
                        strErrorMsg = string.Format("发生数据转换错误，请重新配置映射字段或修改字段值。错误信息如下：列【{0}】，值【{1}】,详情【{2}】", strSourceField, drSource[strSourceField].ToString(), strErrorMsg);
                        break;
                    }
                }
            }
        }

        /// <summary>
        /// 固定值插入数据操作
        /// </summary>
        /// <param name="dtReadySource"></param>
        /// <param name="dtTarget"></param>
        /// <param name="drSource"></param>
        /// <param name="drNewTarget"></param>
        public void FixConditonParamsInsertOperation(DataTable dtReadySource, DataTable dtTarget, DataRow drSource, DataRow drNewTarget)
        {
            try
            {
                foreach (var item in syncInstrumentItem.lstFixedValue)
                {
                    if (dtTarget.Columns.Contains(item.ColumnName))
                    {
                        switch (item.Condition)
                        {
                            case MapCondition.Equal:
                                drNewTarget[item.ColumnName] = item.Value;
                                break;
                            case MapCondition.Sub:
                                ChangeSubConditionValue(item, dtReadySource, drSource, drNewTarget);
                                break;
                            case MapCondition.IFThen:
                                ChangeIFThenConditionValue(item, dtReadySource, drSource, drNewTarget);
                                break;
                            case MapCondition.SubString:
                                ChangeSubStringConditonValue(item, drNewTarget);
                                break;
                            case MapCondition.SubstringStartEnd:
                                ChangeStartEndSubStringConditonValue(item, drNewTarget);
                                break;
                            case MapCondition.Divided:
                                double db1, db2;
                                if (double.TryParse(drNewTarget[item.ColumnName].ToString(), out db1))
                                {
                                    string[] slist = item.Value.ToString().Split(',');
                                    if (slist.Length > 1)
                                    {
                                        drNewTarget[item.ColumnName] = Math.Round(db1 / Convert.ToDouble(slist[0].ToString()), Convert.ToInt32(slist[1]));
                                        //if (double.TryParse(item.Value.ToString(), out db2))
                                        //    = db1 / db2;
                                    }
                                }
                                break;
                            case MapCondition.Multiplied:
                                double db3, db4;
                                if (double.TryParse(drNewTarget[item.ColumnName].ToString(), out db3))
                                {
                                    string[] slist = item.Value.ToString().Split(',');
                                    if (slist.Length > 1)
                                    { drNewTarget[item.ColumnName] = Math.Round(db3 * Convert.ToDouble(slist[0].ToString()), Convert.ToInt32(slist[1])); }
                                }
                                break;
                            case MapCondition.DecimalDigits:
                                double db5;
                                int count;
                                if (double.TryParse(drNewTarget[item.ColumnName].ToString(), out db5))
                                {
                                    if (int.TryParse(item.Value.ToString(), out count))
                                        drNewTarget[item.ColumnName] = Math.Round(db5, count);
                                }
                                break;
                            case MapCondition.AddSubtract:
                                ChangeAddSubtractConditonValue(syncInstrumentItem.lstFixedValue, item, dtReadySource, drSource, drNewTarget);
                                break;
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                AppLog.Error(ex.Message);
            }
        }

        private void ChangeStartEndSubStringConditonValue(CnasConditionMapValue item, DataRow drNewTarget)
        {
            try
            {
                if (item.Value != null && item.Value.ToString() != "")
                {
                    string[] strValues = item.Value.ToString().Split(new string[] { "{", ",", "}" }, StringSplitOptions.RemoveEmptyEntries);
                    if (strValues.Length == 2)
                    {
                        string[] strConfigValues = strValues[0].Split(new string[] { "|" }, StringSplitOptions.RemoveEmptyEntries);

                        if (strValues[1] == "S")
                        {
                            //Regex reg = new Regex($"^[{strValues[0]}]");
                            //if (reg.IsMatch(drNewTarget[item.ColumnName].ToString()))
                            //    drNewTarget[item.ColumnName] = drNewTarget[item.ColumnName].ToString().(0, drNewTarget[item.ColumnName].ToString().Length - 1);

                            foreach (string strConfigValue in strConfigValues)
                            {
                                if (drNewTarget[item.ColumnName].ToString().StartsWith(strConfigValue))
                                {
                                    drNewTarget[item.ColumnName] = drNewTarget[item.ColumnName].ToString().Substring(strConfigValue.Length, drNewTarget[item.ColumnName].ToString().Length - strConfigValue.Length);
                                    break;
                                }
                            }
                        }
                        else if (strValues[1] == "E")
                        {
                            //Regex reg = new Regex($"[{strValues[0]}]$");
                            //if (reg.IsMatch(drNewTarget[item.ColumnName].ToString()))
                            //    drNewTarget[item.ColumnName] = drNewTarget[item.ColumnName].ToString().Substring(0, drNewTarget[item.ColumnName].ToString().Length-1);

                            foreach (string strConfigValue in strConfigValues)
                            {
                                if (drNewTarget[item.ColumnName].ToString().EndsWith(strConfigValue))
                                {
                                    drNewTarget[item.ColumnName] = drNewTarget[item.ColumnName].ToString().Substring(0, drNewTarget[item.ColumnName].ToString().Length - strConfigValue.Length);
                                    break;
                                }
                            }
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                AppLog.Error(ex.Message);
            }
        }


        /// <summary>
        /// 处理SUB类型固定值
        /// </summary>
        /// <param name="item"></param>
        /// <param name="dtReadySource"></param>
        /// <param name="drSource"></param>
        /// <param name="drNewTarget"></param>
        private void ChangeSubConditionValue(CnasConditionMapValue item, DataTable dtReadySource, DataRow drSource, DataRow drNewTarget)
        {
            try
            {
                //解析Value值，如果不能解析，直接插入Value值
                if (item.Value != null && item.Value.ToString() != "")
                {
                    string strInputValue = "";
                    string[] strValues = item.Value.ToString().Split(new string[] { "+" }, StringSplitOptions.RemoveEmptyEntries);
                    if (strValues.Length >= 1 && strValues.Length <= 3)
                    {
                        switch (strValues.Length)
                        {
                            case 1:
                                string strColumnName1 = strValues[0].Split(new string[] { "{", "}" }, StringSplitOptions.RemoveEmptyEntries)[0];
                                if (dtReadySource.Columns.Contains(strColumnName1))
                                    strInputValue = drSource[strColumnName1].ToString();
                                else
                                    strInputValue = strValues[0];
                                break;
                            case 2:
                                strColumnName1 = strValues[0].Split(new string[] { "{", "}" }, StringSplitOptions.RemoveEmptyEntries)[0];
                                if (dtReadySource.Columns.Contains(strColumnName1))
                                    strInputValue = drSource[strColumnName1].ToString();
                                else
                                    strInputValue = strValues[0];

                                string strColumnName2 = strValues[1].Split(new string[] { "{", "}" }, StringSplitOptions.RemoveEmptyEntries)[0];
                                if (dtReadySource.Columns.Contains(strColumnName2))
                                    strInputValue += drSource[strColumnName2].ToString();
                                else
                                    strInputValue += strValues[1];
                                break;
                            case 3:
                                strColumnName1 = strValues[0].Split(new string[] { "{", "}" }, StringSplitOptions.RemoveEmptyEntries)[0];
                                if (dtReadySource.Columns.Contains(strColumnName1))
                                    strInputValue = drSource[strColumnName1].ToString();
                                else
                                    strInputValue = strValues[0];

                                strColumnName2 = strValues[1].Split(new string[] { "{", "}" }, StringSplitOptions.RemoveEmptyEntries)[0];
                                if (dtReadySource.Columns.Contains(strColumnName2))
                                    strInputValue += drSource[strColumnName2].ToString();
                                else
                                    strInputValue += strValues[1];

                                string strColumnName3 = strValues[2].Split(new string[] { "{", "}" }, StringSplitOptions.RemoveEmptyEntries)[0];
                                if (dtReadySource.Columns.Contains(strColumnName3))
                                    strInputValue += drSource[strColumnName3].ToString();
                                else
                                    strInputValue += strValues[2];
                                break;
                        }
                    }
                    else
                    {
                        strInputValue = item.Value.ToString();
                    }
                    drNewTarget[item.ColumnName] = strInputValue;
                }
            }
            catch (Exception ex)
            {
                AppLog.Error(ex.Message);
            }
        }

        private bool SourceDataFilterOperation(DataRow dr)
        {
            //如果过滤器为空或没有任何条件，我们认为用户允许所有数据通过过滤审核
            if (syncInstrumentItem.SourceFilter == null) return true;
            if (syncInstrumentItem.SourceFilter.lstFilterConditions == null) return true;
            if (syncInstrumentItem.SourceFilter.lstFilterConditions.Count == 0) return true;

            bool bReturn = false;
            try
            {
                List<bool> lstMatch = new List<bool>();
                foreach (FilterCondition item in syncInstrumentItem.SourceFilter.lstFilterConditions)
                {
                    bool bIsMatch = false;
                    string strConditionValue = item.ConditionValue;
                    if (strConditionValue == null) continue;
                    if (strConditionValue.StartsWith("RegEx"))  //此时使用正则表达式匹配
                    {
                        string[] strRegExs = strConditionValue.Split(new string[] { "RegEx:" }, StringSplitOptions.RemoveEmptyEntries);
                        if (strRegExs.Length != 1) continue;
                        bIsMatch = Regex.IsMatch(dr[item.ColumnName].ToString(), strRegExs[0]);
                    }
                    else
                    {
                        double result;
                        double conditionresult;
                        switch (item.Algorithm)
                        {
                            case "=":
                                bIsMatch = dr[item.ColumnName].ToString() == item.ConditionValue ? true : false;
                                break;
                            case "<>":
                                bIsMatch = dr[item.ColumnName].ToString() == item.ConditionValue ? false : true;
                                break;
                            case "like":
                                bIsMatch = dr[item.ColumnName].ToString().Contains(item.ConditionValue) ? true : false;
                                break;
                            case "not like":
                                bIsMatch = dr[item.ColumnName].ToString().Contains(item.ConditionValue) ? false : true;
                                break;
                            case ">":
                                if (dr[item.ColumnName] != null)
                                    if (double.TryParse(dr[item.ColumnName].ToString(), out result) && double.TryParse(item.ConditionValue, out conditionresult))
                                        bIsMatch = result > conditionresult ? true : false;
                                break;
                            case "<":
                                if (dr[item.ColumnName] != null)
                                    if (double.TryParse(dr[item.ColumnName].ToString(), out result) && double.TryParse(item.ConditionValue, out conditionresult))
                                        bIsMatch = result < conditionresult ? true : false;
                                break;
                            case ">=":
                                if (dr[item.ColumnName] != null)
                                    if (double.TryParse(dr[item.ColumnName].ToString(), out result) && double.TryParse(item.ConditionValue, out conditionresult))
                                        bIsMatch = result >= conditionresult ? true : false;
                                break;
                            case "<=":
                                if (dr[item.ColumnName] != null)
                                    if (double.TryParse(dr[item.ColumnName].ToString(), out result) && double.TryParse(item.ConditionValue, out conditionresult))
                                        bIsMatch = result <= conditionresult ? true : false;
                                break;
                        }
                    }
                    lstMatch.Add(bIsMatch);
                }
                if (syncInstrumentItem.SourceFilter.FilterConditionLinkType == "and")
                {
                    //只要有一个为否，则返回否
                    if (lstMatch.Where(x => x.Equals(false)).Count() > 0)
                        bReturn = false;
                    else
                        bReturn = true;
                }
                else
                {
                    //只要有一个为是，则返回是
                    if (lstMatch.Where(x => x.Equals(true)).Count() > 0)
                        bReturn = true;
                    else
                        bReturn = false;
                }
            }
            catch (Exception ex)
            {
                AppLog.Error(ex.Message);
            }
            return bReturn;
        }

        /// <summary>
        /// 处理IFThen类型固定值
        /// </summary>
        /// <param name="item"></param>
        /// <param name="dtReadySource"></param>
        /// <param name="drSource"></param>
        /// <param name="drNewTarget"></param>
        private void ChangeIFThenConditionValue(CnasConditionMapValue item, DataTable dtReadySource, DataRow drSource, DataRow drNewTarget)
        {
            try
            {
                if (item.Value != null && item.Value.ToString() != "")
                {
                    List<IFThenConditionParams> lstParams = GlobalCommonOperation.AnanlysisIFThenString(item.Value.ToString());
                    if (lstParams.Count > 0)
                    {
                        foreach (var conditionparams in lstParams)
                        {
                            if (!dtReadySource.Columns.Contains(conditionparams.ConditionColumnName)) continue;

                            if (drSource[conditionparams.ConditionColumnName].ToString() == conditionparams.ConditionColumnValue)
                                drNewTarget[item.ColumnName] = conditionparams.ColumnValue;
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                AppLog.Error(ex.Message);
            }
        }
        /// <summary>
        /// 处理SubString类型固定值
        /// </summary>
        /// <param name="item"></param>
        /// <param name="dtReadySource"></param>
        /// <param name="drSource"></param>
        /// <param name="drNewTarget"></param>
        private void ChangeSubStringConditonValue(CnasConditionMapValue item, DataRow drNewTarget)
        {
            try
            {
                if (item.Value != null && item.Value.ToString() != "")
                {
                    string[] strValues = item.Value.ToString().Split(new string[] { "{", ",", "}" }, StringSplitOptions.RemoveEmptyEntries);

                    if (strValues.Length == 2)
                    {
                        string[] strInputValues = drNewTarget[item.ColumnName].ToString().Split(new string[] { strValues[0] }, StringSplitOptions.RemoveEmptyEntries);
                        if (strInputValues.Length == 1)
                        {

                            var list = strInputValues[0].Substring(Convert.ToInt32(strValues[0]), Convert.ToInt32(strValues[1]));
                            drNewTarget[item.ColumnName] = list;
                        }
                        //if (strInputValues.Length == 2)  //只处理分割后有两部分的
                        //{
                        //    if (strValues[1] == "L")
                        //    {
                        //        drNewTarget[item.ColumnName] = strInputValues[0];
                        //    }
                        //    else if (strValues[1] == "R")
                        //    {
                        //        drNewTarget[item.ColumnName] = strInputValues[1];
                        //    }
                        //}
                    }
                }
            }
            catch (Exception ex)
            {
                AppLog.Error(ex.Message);
            }
        }

        private void ChangeAddSubtractConditonValue(List<CnasConditionMapValue> lstConditionMaps, CnasConditionMapValue item, DataTable dtReadySource, DataRow drSource, DataRow drNewTarget)
        {
            try
            {
                if (item.Value != null && item.Value.ToString() != "")
                {
                    string[] strValues = item.Value.ToString().Split(new string[] { "{", "}" }, StringSplitOptions.RemoveEmptyEntries);
                    if (strValues.Length == 3)
                    {
                        string strParam1 = strValues[0];
                        string strParam2 = strValues[2];
                        double db1, db2;

                        string[] strParam1s = strParam1.Split(new string[] { "[", "]" }, StringSplitOptions.RemoveEmptyEntries);
                        if (strParam1s.Length >= 1)
                        {
                            string[] strParam2s = strParam2.Split(new string[] { "[", "]" }, StringSplitOptions.RemoveEmptyEntries);
                            if (strParam2s.Length >= 1)
                            {
                                if (dtReadySource.Columns.Contains(strParam1s[0]) && dtReadySource.Columns.Contains(strParam2s[0]))
                                    if (double.TryParse(drSource[strParam1s[0]].ToString(), out db1))
                                    {
                                        if (double.TryParse(drSource[strParam2s[0]].ToString(), out db2))
                                        {
                                            if (strParam1s.Length == 3)
                                                db1 = GetDividedMultipliedData(db1, strParam1s[1], strParam1s[2]);
                                            if (strParam2s.Length == 3)
                                                db2 = GetDividedMultipliedData(db2, strParam2s[1], strParam2s[2]);

                                            drNewTarget[item.ColumnName] = strValues[1].ToLower() == "subtract" ? db1 - db2 : db1 + db2;
                                        }
                                    }
                            }
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                AppLog.Error(ex.Message);
            }
        }

        /// <summary>
        /// 在计算数值相加和相减之前，如果计算的列已经有乘以或除以的操作，则先进行乘以或除以，再进行相加或相减
        /// </summary>
        /// <param name="lstConditionMaps"></param>
        /// <param name="drSource"></param>
        /// <param name="db1"></param>
        /// <param name="strColumnName"></param>
        /// <returns></returns>
        public double GetDividedMultipliedData(double db1, string strExpresstion, string strValue)
        {
            double db2;
            if (double.TryParse(strValue, out db2))
            {
                db1 = strExpresstion == "*" ? db1 * db2 : db1 / db2;
            }
            return db1;
        }

        /// <summary>
        /// 对准备插入的数据进行格式上的检查
        /// </summary>
        /// <param name="dtTarget"></param>
        /// <param name="strErrorMsg"></param>
        public void CheckInsertDataFormat(DataTable dtTarget, ref string strErrorMsg)
        {
            //检查数据合法性
            CnasDataCheck check = new CnasDataCheck
            {
                DtReadyInsert = dtTarget,
                TargetDataBase = syncInstrumentItem.SyncTargetDBInfo,
                StrTableName = syncInstrumentItem.LstSyncPramas[0].TargetTable
            };
            check.CheckData();
            if (check.LstIllegalMsg != null && check.LstIllegalMsg.Count > 0)
            {
                var item = syncInstrumentItem.LstSyncPramas.Where(s => s.TargetField == check.LstIllegalMsg[0].ColumnName).ToList<SyncParamasInfo>();
                if (item.Count == 1)
                {
                    strErrorMsg = string.Format("数据不满足上传条件，请修改后再上传。错误数据:当前列名【{0}】,列值【{1}】", item[0].SourceField, check.LstIllegalMsg[0].ColumnValue);
                }
                else
                {
                    strErrorMsg = string.Format("数据不满足上传条件，请修改后再上传。错误数据:CNAS列名【{0}】,列值【{1}】", check.LstIllegalMsg[0].ColumnName, check.LstIllegalMsg[0].ColumnValue);
                }
                return;
            }
        }

        /// <summary>
        /// 尝试将值插入到目标表单的各个行中
        /// </summary>
        /// <returns></returns>
        private string TestConvertValueToTarget(DataRow drTarget, DataRow drSource, string strTargetColumn, string strSourceColumn, string strDateColumn)
        {
            string strErrorMsg = "";
            try
            {
                if (strTargetColumn.ToLower() != strDateColumn.ToLower())
                {
                    string strTargetColumnType = drTarget.Table.Columns[strTargetColumn].DataType.ToString();
                    switch (strTargetColumnType)
                    {
                        case "System.Decimal":
                            if (drSource[strSourceColumn] == null || (drSource[strSourceColumn] != null && drSource[strSourceColumn].ToString() == ""))
                                drTarget[strTargetColumn] = 0;
                            else
                                drTarget[strTargetColumn] = Convert.ToDouble(drSource[strSourceColumn]);
                            break;
                        default:
                            drTarget[strTargetColumn] = drSource[strSourceColumn];
                            break;
                    }
                }
                else  //日期字段需要单独处理
                {
                    DateTime dt = DateTime.Now;
                    if (DateTime.TryParse(drSource[strSourceColumn].ToString(), out dt))
                    {
                        drTarget[strTargetColumn] = dt.ToString("yyyy-MM-dd HH:mm:ss");
                    }
                    else
                    {
                        drTarget[strTargetColumn] = drSource[strSourceColumn];
                    }
                }
            }
            catch (Exception ex)
            {
                strErrorMsg = ex.Message;
            }
            return strErrorMsg;
        }


    }
}