mes-client/UAS_MES_YDCY/DataOperate/DataHelper.cs

using Oracle.ManagedDataAccess.Client;
using System;
using System.Collections.Generic;
using System.Data;
using System.Text;
using UAS_MES_NEW.PublicMethod;

namespace UAS_MES_NEW.DataOperate
{
    class DataHelper
    {
        //系统默认的的连接字符串
        private string ConnectionStrings = "Connection Timeout=30;Pooling=true;Min Pool Size=2;Max Pool Size=8;Connection Lifetime=300;Password=select!#%*(;User ID=YD_CYZZ;Data Source=(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.0.85)(PORT=1521)))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=orcl)));";
        //用户选择的数据库的连接字符串
        public static string DBConnectionString;
        public static OracleConnection connection = null;
        OracleCommand command = null;
        int ReconnectTime = 0;
        //记录当前 static connection 使用的连接串,用于检测账套切换
        private static string currentConnString = null;

        /// <summary>
        /// 执行构造函数的时候打开数据库的链接
        /// </summary>
        public DataHelper()
        {
            try
            {
                //如果选择的是默认数据则直接用配置文件的信息连接，否则选择数据库的账套信息
                string targetConnString;
                if (DBConnectionString == null || DBConnectionString == ConnectionStrings)
                    targetConnString = ConnectionStrings;
                else
                    targetConnString = DBConnectionString;

                //连接复用:仅当连接不存在/未打开/账套切换时才重建。
                //原实现每次 new DataHelper() 都覆盖 static connection 新建物理连接,
                //旧连接因窗体 dh 实例持有引用不被 GC,导致单客户端泄漏 20+ 个数据库会话。
                if (connection == null || connection.State != ConnectionState.Open || currentConnString != targetConnString)
                {
                    try
                    {
                        if (connection != null)
                            connection.Close();  //开启连接池后 Close 归还池,不再占用数据库会话
                    }
                    catch (Exception) { }

                    connection = new OracleConnection(targetConnString);
                    connection.Open();
                    currentConnString = targetConnString;
                }
            }
            catch (Exception e) { LogManager.DoLog(e.Message); }
        }

        /// <summary>
        /// 根据表名获取该表字段数据类型
        /// </summary>
        public DataTable GetColumnDataType(string TableName)
        {
            DataTable dt = new DataTable();
            command = new OracleCommand("select Column_Name,Data_Type from cols where TABLE_name=upper('" + TableName + "')", connection);
            Reconnect(command);
            OracleDataAdapter ad = new OracleDataAdapter(command);
            ad.Fill(dt);
            ad.Dispose();

            return dt;
        }

        /// <summary>
        /// 获取第一行第一列的信息
        /// </summary>
        public object getFieldDataByCondition(string TableName, string Field, string Condition)
        {
            DataTable dt = new DataTable();
            string sql = "select " + Field + " from " + TableName + " where " + Condition;
            command = new OracleCommand(sql, connection);
            Reconnect(command);
            OracleDataAdapter ad = new OracleDataAdapter();
            ad.SelectCommand = command;
            try
            {
                ad.Fill(dt);
            }
            catch (Exception)
            {
                connection = new OracleConnection(DBConnectionString);
                connection.Open();
                command = new OracleCommand(sql, connection);
                ad = new OracleDataAdapter();
                ad.SelectCommand = command;
                ad.Fill(dt);
            }
            ad.Dispose();

            if (dt.Rows.Count > 0)
            {
                return dt.Rows[0][0];
            }
            else
            {
                return "";
            }
        }

        /// <summary>
        /// 获取第一行第一列的信息(参数化版,防SQL注入)
        /// where 中使用 :p0,:p1 占位符,values 按占位符出现顺序传入
        /// </summary>
        public object getFieldDataByCondition(string TableName, string Field, string whereWithPlaceholders, params object[] values)
        {
            string sql = "select " + Field + " from " + TableName + " where " + whereWithPlaceholders;
            DataTable dt = (DataTable)ExecuteSql(sql, "select", values);
            if (dt != null && dt.Rows.Count > 0)
            {
                return dt.Rows[0][0];
            }
            return "";
        }

        /// <summary>
        /// 执行打印的SQL
        /// </summary>
        /// <param name="SQL">SQL语句</param>
        /// <param name="Parameters">动态添加的参数，主要根据条码枪扫描获取</param>
        /// <returns></returns>
        public object ExecutePrintSQL(string SQL, params string[] Parameters)
        {
            //按照？拆分数据，然后以:Param替换问号，同时添加参数
            string[] Param = SQL.Split('?');
            int ParamNum = Param.Length - 1;
            //条码打印必然存在需要维护的参数
            if (ParamNum > 0)
            {
                StringBuilder sb = new StringBuilder();
                for (int i = 0; i < ParamNum; i++)
                {
                    sb.Append(Param[i] + ":Param" + i);
                }
                command = new OracleCommand(sb.ToString(), connection);

                for (int i = 0; i < ParamNum; i++)
                {
                    command.Parameters.Add("Param" + i, OracleDbType.Varchar2, Parameters[i], ParameterDirection.Input);
                }
                OracleDataAdapter ad = new OracleDataAdapter(command);
                DataTable dt = new DataTable();
                ad.Fill(dt);
                ad.Dispose();

                return dt;
            }
            return "参数错误，请检查SQL语句";
        }

        /// <summary>
        /// 获取指定表的记录的条数 ,带条件
        /// </summary>
        /// <returns></returns>
        public int getRowCount(string TableName, string Condition)
        {
            DataTable dt = new DataTable();
            string sql = "select count(1) from " + TableName + " where " + Condition;
            Console.WriteLine(  sql);
            command = new OracleCommand(sql, connection);
            Reconnect(command);
            OracleDataAdapter ad = new OracleDataAdapter(command);
            ad.Fill(dt);
            ad.Dispose();

            return int.Parse(dt.Rows[0][0].ToString());
        }

        /// <summary>
        /// 获取指定表的记录的条数 ,不带条件
        /// </summary>
        /// <param name="TableName"></param>
        /// <returns></returns>
        public int getRowCount(string TableName)
        {
            DataTable dt = new DataTable();
            string sql = "select count(1) from " + TableName;
            command = new OracleCommand(sql, connection);
            Reconnect(command);
            OracleDataAdapter ad = new OracleDataAdapter(command);

            ad.Fill(dt);
            ad.Dispose();

            return int.Parse(dt.Rows[0][0].ToString());
        }

        /// <summary>
        /// 通过表名和获取单行的记录
        /// </summary>
        public DataTable getFieldsDataByCondition(string TableName, string[] Fields, string Condition)
        {
            DataTable dt = new DataTable();
            string sql = "select ";
            sql += AddField(Fields);
            sql += " from " + TableName + " where " + Condition + " and rownum=1";
            command = new OracleCommand(sql, connection);
            Reconnect(command);
            OracleDataAdapter ad = new OracleDataAdapter(command);
            try
            {
                ad.Fill(dt);
            }
            catch (Exception)
            {
                connection = new OracleConnection(DBConnectionString);
                connection.Open();
                command = new OracleCommand(sql, connection);
                ad = new OracleDataAdapter();
                ad.SelectCommand = command;
                ad.Fill(dt);
            }
            ad.Dispose();

            return dt;
        }

        /// <summary>
        /// 通过表名和获取单行的记录(参数化版,防SQL注入)
        /// where 中使用 :p0,:p1 占位符,values 按占位符出现顺序传入
        /// </summary>
        public DataTable getFieldsDataByCondition(string TableName, string[] Fields, string whereWithPlaceholders, params object[] values)
        {
            string sql = "select " + AddField(Fields) + " from " + TableName + " where " + whereWithPlaceholders;
            return (DataTable)ExecuteSql(sql, "select", values);
        }

        /// <summary>
        /// 将DataTable导入到指定的表中
        /// </summary>
        /// <param name="DataTable"></param>
        /// <param name="TableName"></param>
        public void InsertDataTable(DataTable DataTable, string TableName)
        {
            for (int i = 0; i < DataTable.Rows.Count; i++)
            {
                for (int j = 0; j < DataTable.Columns.Count; j++)
                {

                }
            }
        }

        /// <summary>
        /// 按分页获取数据
        /// </summary>
        /// <param name="TableName">表名</param>
        /// <param name="Fields">查询字段</param>
        /// <param name="CurrentPage">当前页面</param>
        /// <param name="PageSize">页面展示条数</param>
        /// <param name="Caller"></param>
        /// <returns></returns>
        // SELECT * FROM (SELECT   A.*  FROM (SELECT* FROM datalist) A WHERE ROWNUM <= 50) WHERE ROWNUM >= 21
        public DataTable getFieldsDatasByPageing(string TableName, string Fields, int CurrentPage, int PageSize, string Caller, params string[] condition)
        {
            DataTable dt = new DataTable();
            StringBuilder sql = new StringBuilder();
            //先查询出配置出去的列
            //获取查询的列
            string[] caption = GetCaptionFromField(Fields);
            //获取对应列的描述
            string[] field = GetField(Fields);
            sql.Append(" select * from (select RowNum RN, A.* from (select ");
            sql.Append(AddField(caption));
            if (condition.Length > 0)
            {
                if (condition[0] != null && condition[0].Trim() != "")
                    sql.Append(" from " + TableName + " where " + condition[0] + " ) A where ROWNUM <=" + CurrentPage * PageSize + ") where RN>" + (CurrentPage - 1) * PageSize);
                else
                    sql.Append(" from " + TableName + ") A where ROWNUM <= " + CurrentPage * PageSize + ") where RN> " + (CurrentPage - 1) * PageSize);
            }
            command = new OracleCommand(sql.ToString(), connection);
            Reconnect(command);
            OracleDataAdapter ad = new OracleDataAdapter(command);
            ad.Fill(dt);
            ad.Dispose();

            dt.Columns.RemoveAt(0);
            foreach (DataColumn dc in dt.Columns)
            {
                dc.ColumnName = field[dt.Columns.IndexOf(dc)];
                dc.Caption = caption[dt.Columns.IndexOf(dc)];
            }
            return dt;
        }

        /// <summary>
        /// 通过表名，字段和条件获取DataTable类型的数据
        /// </summary>
        public DataTable getFieldsDatasByCondition(string TableName, string[] Fields, string Condition)
        {
            DataTable dt = new DataTable();
            string sql = "select ";
            sql += AddField(Fields);
            sql += " from " + TableName + " where " + Condition;

            command = new OracleCommand(sql, connection);
            Reconnect(command);
            OracleDataAdapter ad = new OracleDataAdapter(command);
            try
            {
                ad.Fill(dt);
            }
            catch (Exception)
            {
                connection = new OracleConnection(DBConnectionString);
                connection.Open();
                command = new OracleCommand(sql, connection);
                ad = new OracleDataAdapter();
                ad.SelectCommand = command;
                ad.Fill(dt);
            }
            ad.Dispose();

            return dt;
        }

        /// <summary>
        /// 通过表名，字段获取DataTable类型的数据
        /// </summary>
        public DataTable getFieldsDatas(string TableName, string Fields)
        {
            DataTable dt = new DataTable();
            string sql = "select ";
            sql += Fields;
            sql += " from " + TableName;
            command = new OracleCommand(sql, connection);
            Reconnect(command);
            OracleDataAdapter ad = new OracleDataAdapter(command);
            ad.SelectCommand = command;
            try
            {
                ad.Fill(dt);
            }
            catch (Exception)
            {
                connection = new OracleConnection(DBConnectionString);
                connection.Open();
                command = new OracleCommand(sql, connection);
                ad = new OracleDataAdapter();
                ad.SelectCommand = command;
                ad.Fill(dt);
            }
            ad.Dispose();

            return dt;
        }

        /// <summary>
        /// 通过表名,字段获取DataTable类型的数据(带行数上限,防止全表加载导致内存膨胀)
        /// 列表类界面应优先使用此重载或已有的 getFieldsDatasByPageing,避免无限制 Fill 全表
        /// </summary>
        public DataTable getFieldsDatas(string TableName, string Fields, int maxRows)
        {
            DataTable dt = new DataTable();
            string sql = "select " + Fields + " from " + TableName + " where rownum <= " + maxRows;
            command = new OracleCommand(sql, connection);
            Reconnect(command);
            OracleDataAdapter ad = new OracleDataAdapter();
            ad.SelectCommand = command;
            try
            {
                ad.Fill(dt);
            }
            catch (Exception)
            {
                connection = new OracleConnection(DBConnectionString);
                connection.Open();
                command = new OracleCommand(sql, connection);
                ad = new OracleDataAdapter();
                ad.SelectCommand = command;
                ad.Fill(dt);
            }
            ad.Dispose();

            return dt;
        }

        /// <summary>
        /// 根据DataTable和指定的表名更新数据,如果需要保存新增的数据则需要传递一条Insert的SQL
        /// </summary>
        /// <param name="DataTable"></param>
        /// <param name="TableName"></param>
        /// <param name="Condition"></param>
        public void UpDateTableByCondition(DataTable DataTable, string TableName, string PrimaryKey, params string[] sql)
        {
            if (DataTable == null)
            {
                return;
            }
            StringBuilder sb = new StringBuilder();
            //预防插入的DataTable中存在不属于该表的列，在进行下一步操作之前全部剔除
            DataTable data = (DataTable)ExecuteSql("select Column_Name,Data_Type from cols where TABLE_name=upper('" + TableName + "')", "select");
            //将所有的字段拼接起来
            for (int i = 0; i < data.Rows.Count; i++)
            {
                sb.Append("#" + data.Rows[i]["Column_Name"].ToString());
            }
            //移除掉所有不属于该表的列
            for (int i = DataTable.Columns.Count - 1; i >= 0; i--)
            {
                if (!sb.ToString().Contains(DataTable.Columns[i].ColumnName.ToUpper()))
                {
                    DataTable.Columns.RemoveAt(i);
                }
            }
            sb.Clear();
            //计算有多少个是新加的行,根据主键为空来进行判断
            int NewRowCount = 0;
            for (int i = 0; i < DataTable.Rows.Count; i++)
            {
                if (DataTable.Rows[i][PrimaryKey] == null || DataTable.Rows[i][PrimaryKey].ToString() == "")
                {
                    NewRowCount = NewRowCount + 1;
                }
            }
            if (sql.Length > 0)
            {
                if (NewRowCount > 0)
                {
                    //获取参数的个数
                    int paramsNum = sql[0].Split(':').Length - 1;
                    //解析参数的数据
                    string[] param = GetParamFromSQL(sql[0]);
                    //新建一个二维数组去
                    string[][] param_array = new string[paramsNum][];
                    //实例化每个一维数组
                    for (int i = 0; i < paramsNum; i++)
                    {
                        param_array[i] = new string[NewRowCount];
                    }
                    //设置每列参数的索引
                    int num = 0;
                    //变量所有的行，如果有主键为空的则移除，不为空的进行参数的拼接
                    for (int i = DataTable.Rows.Count - 1; i >= 0; i--)
                    {
                        if (DataTable.Rows[i][PrimaryKey] == null || DataTable.Rows[i][PrimaryKey].ToString() == "")
                        {
                            //当为新添加行的时候才去设置参数，设置过后索引+1
                            for (int j = 0; j < paramsNum; j++)
                            {
                                param_array[j][num] = DataTable.Rows[i][param[j]].ToString();
                            }
                            DataTable.Rows.RemoveAt(i);
                            num++;
                        }
                    }
                    BatchInsertDataTable(sql[0], param, param_array);
                }
            }
            //不是新增行的启用更新的方法
            sb.Append("update " + TableName + " set ");
            //拼接语句，特殊处理日期

            foreach (DataColumn dc in DataTable.Columns)
            {
                if (!dc.DataType.ToString().Equals("System.DateTime"))
                {
                    sb.Append(dc.Caption + "=:" + dc.Caption + ",");
                }
                else
                {
                    sb.Append(dc.Caption + "=:" + dc.Caption + ",");
                }
            }
            sb.Remove(sb.Length - 1, 1);
            sb.Append(" where " + PrimaryKey + "=:" + PrimaryKey);
            command = new OracleCommand(sb.ToString(), connection);
            OracleDataAdapter ad = new OracleDataAdapter(command);
            // 参数的长度是DataTable的行数决定的
            command.ArrayBindCount = DataTable.Rows.Count;
            //默认全部是Varchar2类型的
            OracleDbType ob = OracleDbType.Varchar2;
            for (int i = 0; i < DataTable.Columns.Count; i++)
            {
                object[] param = new object[DataTable.Rows.Count];
                for (int j = 0; j < DataTable.Rows.Count; j++)
                {
                    DateTime dt = DateTime.Now;
                    if (DateTime.TryParse(DataTable.Rows[j][i].ToString(), out dt))
                    {
                        param[j] = dt;
                        ob = OracleDbType.Date;
                    }
                    else
                    {
                        ob = OracleDbType.Varchar2;
                        param[j] = DataTable.Rows[j][i];
                    }
                }
                //添加批量更新的参数
                command.Parameters.Add(new OracleParameter(DataTable.Columns[i].Caption, ob, param, ParameterDirection.Input));
            }
            ad.UpdateCommand = command;
            ad.Update(DataTable);
            ad.Dispose();

        }

        /// <summary>
        /// 获取DbFind的数据的DataTable的结构
        /// </summary>
        /// <param name="field"></param>
        /// <param name="caller"></param>
        /// <returns></returns>
        public DataTable GetDbFindDataTable(string field, string caller)
        {
            string sql = "select * from dbfindsetui where ds_caller='" + caller + "' and ds_whichui='" + field + "'";
            DataTable dt = (DataTable)ExecuteSql(sql, "select");
            if (dt.Rows.Count != 0)
            {
                //通过#号分割字段
                string[] dbfield = dt.Rows[0]["ds_findtoui"].ToString().Split('#');
                string[] cnfield = dt.Rows[0]["ds_dbcaption"].ToString().Split('#');
                //获取查询要查询的Table
                string dbtable = dt.Rows[0]["ds_tables"].ToString();
                //拼接查询的字段
                for (int i = 0; i < dbfield.Length; i++)
                {
                    dbfield[i] = dbfield[i].Split(',')[0];
                }
                //新建一个空的DataTable
                DataTable dt1 = new DataTable();
                //往空的DataTable添加结构,ColumnName是中文，Caption是实际的字段名称
                for (int i = 0; i < cnfield.Length; i++)
                {
                    dt1.Columns.Add(cnfield[i]);
                    dt1.Columns[i].Caption = dbfield[i];
                }
                //返回一个带有结构的空的DataTable
                //DbFind.BindTable1 = dbtable;
                return dt1;
            }
            else
            {
                return null;
            }
        }

        /// <summary>
        /// 检测内容是否存在
        /// </summary>
        /// <param name="TableName"></param>
        /// <param name="Condition"></param>
        /// <returns></returns>
        public bool CheckExist(string TableName, string Condition)
        {
            string sql = "select count(1) from " + TableName + " where " + Condition;
            command = new OracleCommand(sql, connection);
            Reconnect(command);
            OracleDataAdapter ad = new OracleDataAdapter(command);
            DataTable dt = new DataTable();
            try
            {
                ad.Fill(dt);
            }
            catch (Exception)
            {
                connection = new OracleConnection(DBConnectionString);
                connection.Open();
                command = new OracleCommand(sql, connection);
                ad = new OracleDataAdapter();
                ad.SelectCommand = command;
                ad.Fill(dt);
            }
            ad.Dispose();

            Console.WriteLine(dt.Rows[0][0].ToString());
            Console.WriteLine(int.Parse(dt.Rows[0][0].ToString()) > 0);
            return int.Parse(dt.Rows[0][0].ToString()) > 0;
        }

        /// <summary>
        /// 直接执行SQL，同时传入SQL的类型
        /// </summary>
        /// <param name="SQL"></param>
        /// <param name="Type"></param>
        /// <returns></returns>
        public object ExecuteSql(string SQL, string Type, params object[] names)
        {
            object result = null;
            command = new OracleCommand(SQL, connection);
            Reconnect(command);
            //用来拼接参数的
            if (names.Length > 0)
            {
                string[] par = SQL.Split(':');
                //用来存参数的数组
                StringBuilder[] addpar = new StringBuilder[par.Length - 1];
                for (int i = 0; i < par.Length - 1; i++)
                {
                    //新建一个char类型的数组用来存储每个字节的变量
                    char[] c = par[i + 1].ToCharArray();
                    addpar[i] = new StringBuilder();
                    for (int j = 0; j < c.Length; j++)
                    {
                        if (c[j] != ' ' && c[j] != ',' && c[j] != ')')
                        {
                            addpar[i].Append(c[j]);
                        }
                        else
                        {
                            break;
                        }
                    }
                }
                for (int i = 0; i < addpar.Length; i++)
                    command.Parameters.Add(new OracleParameter(addpar[i].ToString(), OracleDbType.Varchar2, names[i], ParameterDirection.Input));
            }
            Console.WriteLine(SQL);
            switch (Type.ToUpper())
            {
                case "SELECT":
                    OracleDataAdapter ad = new OracleDataAdapter(command);
                    result = new DataTable();
                    try
                    {
                        ad.Fill((DataTable)result);
                    }
                    catch (Exception)
                    {
                        connection = new OracleConnection(DBConnectionString);
                        connection.Open();
                        command = new OracleCommand(SQL, connection);
                        ad = new OracleDataAdapter();
                        ad.SelectCommand = command;
                        ad.Fill((DataTable)result);
                    }
                    break;
                case "DELETE":
                    try
                    {
                        result = command.ExecuteNonQuery();
                    }
                    catch (Exception)
                    {
                        command.Connection = new OracleConnection(DBConnectionString);
                        command.Connection.Open();
                        result = command.ExecuteNonQuery();
                    }
                    break;
                case "UPDATE":
                    try
                    {
                        result = command.ExecuteNonQuery();
                    }
                    catch (Exception)
                    {
                        command.Connection = new OracleConnection(DBConnectionString);
                        command.Connection.Open();
                        result = command.ExecuteNonQuery();
                    }
                    break;
                case "INSERT":
                    try
                    {
                        result = command.ExecuteNonQuery();
                    }
                    catch (Exception)
                    {
                        command.Connection = new OracleConnection(DBConnectionString);
                        command.Connection.Open();
                        result = command.ExecuteNonQuery();
                    }
                    break;
            }

            return result;
        }

        /// <summary>
        /// 为了同步BS端的条码维护，检测时允许问号的存在，在检测时默认将问号换成:Param参数
        /// </summary>
        /// <param name="SQL"></param>
        public void CheckSQL(string SQL)
        {
            SQL = SQL.Replace("?", ":Param");
            command = new OracleCommand(SQL, connection);
            command.ExecuteNonQuery();

        }

        public int GetDistinctRowCount(string TableName, string Field)
        {
            DataTable dt = new DataTable();
            string sql = "select distinct count('" + Field + "') from " + TableName;
            command = new OracleCommand(sql, connection);
            Reconnect(command);
            OracleDataAdapter ad = new OracleDataAdapter(command);
            try
            {
                ad.Fill(dt);
            }
            catch (Exception)
            {
                connection = new OracleConnection(DBConnectionString);
                connection.Open();
                command = new OracleCommand(sql, connection);
                ad = new OracleDataAdapter();
                ad.SelectCommand = command;
                ad.Fill(dt);
            }
            ad.Dispose();

            return int.Parse(dt.Rows[0][0].ToString());
        }

        /// <summary>
        /// 根据Caller获取流水号
        /// </summary>
        /// <param name="Caller"></param>
        /// <returns></returns>
        public string GetSerialNumberByCaller(string Caller)
        {
            string SerialNumber = getFieldDataByCondition("MaxNumbers", "mn_number", "mn_tablename='" + Caller + "'").ToString();
            UpdateByCondition("MaxNumbers", "mn_number=mn_number+1", "mn_tablename='" + Caller + "'");
            return SerialNumber;
        }

        /// <summary>
        /// 根据主键ID删除表的数据
        /// </summary>
        /// <param name="TableName">表名</param>
        /// <param name="ID">主键</param>
        /// <param name="DeleteID">需要删除主键ID的数组</param>
        public void DeleteDataByID(string TableName, string ID, string[] DeleteID)
        {
            string sql = "delete from " + TableName + " where " + ID + " =:DeleteID";

            command = new OracleCommand(sql, connection);
            Reconnect(command);
            command.ArrayBindCount = DeleteID.Length;
            command.Parameters.Add(new OracleParameter("DeleteID", OracleDbType.Long, DeleteID, ParameterDirection.Input));
            try
            {
                command.ExecuteNonQuery();
            }
            catch (Exception)
            {
                command.Connection = new OracleConnection(DBConnectionString);
                command.Connection.Open();
                command.ExecuteNonQuery();
            }

        }

        /// <summary>
        /// 通过序列的名称获取序列
        /// </summary>
        /// <param name="SeqName"></param>
        /// <returns></returns>
        public string GetSEQ(string SeqName)
        {
            DataTable dt = new DataTable();
            dt = (DataTable)ExecuteSql("SELECT " + SeqName + ".NEXTVAL FROM DUAL", "select");
            return dt.Rows[0][0].ToString();
        }

        /// <summary>
        /// 通过序列的名称获取序列
        /// </summary>
        /// <param name="SeqName"></param>
        /// <returns></returns>
        public string[] GetSEQ(string SeqName, int Num)
        {
            DataTable dt = new DataTable();
            dt = (DataTable)ExecuteSql("SELECT " + SeqName + ".nextval  FROM DUAL CONNECT BY LEVEL<=" + Num, "select");
            string[] SerialNum = new string[dt.Rows.Count];
            for (int i = 0; i < dt.Rows.Count; i++)
            {
                SerialNum[i] = dt.Rows[i][0].ToString();
            }
            return SerialNum;
        }

        public void SaveDataTable(DataTable dt, string TableName, string ID, params string[] sql)
        {
            if (dt == null)
            {
                return;
            }
            StringBuilder sb = new StringBuilder();
            //预防插入的DataTable中存在不属于该表的列，在进行下一步操作之前全部剔除
            DataTable data = (DataTable)ExecuteSql("select Column_Name,Data_Type from cols where TABLE_name=upper('" + TableName + "')", "select");
            //将所有的字段拼接起来
            for (int i = 0; i < data.Rows.Count; i++)
            {
                sb.Append("#" + data.Rows[i]["Column_Name"].ToString());
            }
            //移除掉所有不属于该表的列
            for (int i = dt.Columns.Count - 1; i >= 0; i--)
            {
                if (!sb.ToString().Contains(dt.Columns[i].ColumnName.ToUpper()))
                {
                    dt.Columns.RemoveAt(i);
                }
            }
            sb.Clear();
            //计算有多少个是新加的行,根据主键为空来进行判断
            int NewRowCount = 0;
            for (int i = 0; i < dt.Rows.Count; i++)
            {
                if (dt.Rows[i][ID] == null || dt.Rows[i][ID].ToString() == "")
                {
                    NewRowCount = NewRowCount + 1;
                }
            }
            if (sql.Length > 0)
            {
                if (NewRowCount > 0)
                {
                    //获取参数的个数
                    int paramsNum = sql[0].Split(':').Length - 1;
                    //解析参数的数据
                    string[] param = GetParamFromSQL(sql[0]);
                    //新建一个二维数组去
                    string[][] param_array = new string[paramsNum][];
                    //实例化每个一维数组
                    for (int i = 0; i < paramsNum; i++)
                    {
                        param_array[i] = new string[NewRowCount];
                    }
                    //设置每列参数的索引
                    int num = 0;
                    //变量所有的行，如果有主键为空的则移除，不为空的进行参数的拼接
                    for (int i = dt.Rows.Count - 1; i >= 0; i--)
                    {
                        if (dt.Rows[i][ID] == null || dt.Rows[i][ID].ToString() == "")
                        {
                            //当为新添加行的时候才去设置参数，设置过后索引+1
                            for (int j = 0; j < paramsNum; j++)
                            {
                                param_array[j][num] = dt.Rows[i][param[j]].ToString();
                            }
                            dt.Rows.RemoveAt(i);
                            num++;
                        }
                    }
                    BatchInsertDataTable(sql[0], param, param_array);
                }
            }
            sb.Clear();
            sb.Append("update " + TableName + " set ");
            int ColumnCount = dt.Columns.Count;
            int RowCount = dt.Rows.Count;
            //存数据的参数
            List<string[]> Parameter = new List<string[]>();
            //存参数名的参数
            string[] ParName = new string[ColumnCount];
            for (int i = 0; i < ColumnCount; i++)
            {
                ParName[i] = dt.Columns[i].ColumnName;
                if (i == dt.Columns.Count - 1)
                    sb.Append(dt.Columns[i].ColumnName + "=:" + dt.Columns[i].ColumnName);
                else
                    sb.Append(dt.Columns[i].ColumnName + "=:" + dt.Columns[i].ColumnName + ",");
            }
            sb.Append(" where " + ID + " =:" + ID);
            //先添加参数
            Parameter.Add(ParName);
            //添加参数的具体内容
            for (int i = 0; i < ColumnCount; i++)
            {
                string[] par = new string[RowCount];
                for (int j = 0; j < RowCount; j++)
                {
                    par[j] = dt.Rows[j][i].ToString();
                }
                Parameter.Add(par);
            }
            BatchInsert(sb.ToString(), Parameter.ToArray());
        }

        /// <summary>
        /// 批量通过SQL来执行插入操作 ，参数的第一个数一个string[]数组，用来传递需要添加的参数的名称
        /// 之后的是名称参数数组对应的 ，所有的插入参数数据长度必须是一致的
        /// </summary>
        /// <param name="sql"></param>
        /// <param name="names"></param>
        public void BatchInsert(string sql, params object[][] names)
        {
            command = new OracleCommand(sql, connection);
            Reconnect(command);
            command.ArrayBindCount = names[1].Length;

            //因为第一个数组保存的是参数的名称，所以循环从1而不是0开始
            //将第一个数组的下标固定为0作为循环添加的参数的名称
            for (int i = 1; i <= names[0].Length; i++)
            {
                command.Parameters.Add(new OracleParameter(names[0][i - 1].ToString(), OracleDbType.Varchar2, names[i], ParameterDirection.Input));
            }
            try
            {
                command.ExecuteNonQuery();
            }
            catch (Exception)
            {
                command.Connection = new OracleConnection(DBConnectionString);
                command.Connection.Open();
                command.ExecuteNonQuery();
            }

        }

        public void BatchInsertDataTable(string sql, string[] param, params object[][] param1)
        {
            command = new OracleCommand(sql, connection);
            Reconnect(command);
            command.ArrayBindCount = param1[0].Length;
            //因为第一个数组保存的是参数的名称，所以循环从1而不是0开始
            //将第一个数组的下标固定为0作为循环添加的参数的名称
            for (int i = 0; i < param.Length; i++)
            {
                command.Parameters.Add(new OracleParameter(param[i].ToString(), OracleDbType.Varchar2, param1[i], ParameterDirection.Input));
            }
            try
            {
                command.ExecuteNonQuery();
            }
            catch (Exception)
            {
                command.Connection = new OracleConnection(DBConnectionString);
                command.Connection.Open();
                command.ExecuteNonQuery();
            }

        }

        /// <summary>
        /// 取Configs表中的配置，进行该客户是否执行某个操作
        /// </summary>
        /// <param name="Code"></param>
        /// <param name="Caller"></param>
        /// <returns></returns>
        public object GetConfig(string Code, string Caller)
        {
            DataTable dt = new DataTable();
            string sql = "select Data from configs where code='" + Code + "' and caller='" + Caller + "'";
            dt = (DataTable)ExecuteSql(sql, "select");
            if (dt.Rows.Count == 0)
            {
                return "";
            }
            else
            {
                return dt.Rows[0]["Data"];
            }
        }


        //将数据类型的列类型转换为DataTable
        public DataTable DataTypeColumnToDataTable(DataTable dt)
        {
            DataTable dt1 = new DataTable();
            dt1.Rows.Add();
            foreach (DataRow dr in dt.Rows)
            {
                dt1.Columns.Add(dr[0].ToString());
                int index = dt.Rows.IndexOf(dr);
                if (dr[1].ToString() == "NUMBER")
                {
                    dt1.Rows[0][index] = 0;
                }
                if (dr[1].ToString() == "VARCHAR2")
                {
                    dt1.Rows[0][index] = "这是一段文字";
                }
                if (dr[1].ToString() == "DATE")
                {
                    dt1.Rows[0][index] = DateTime.Now.ToString("yyyy-MM-dd");
                }
                if (dr[1].ToString() == "FLOAT")
                {
                    dt1.Rows[0][index] = 1.0;
                }
                if (dr[1].ToString() == "CLOB")
                {
                    dt1.Rows[0][index] = "一段长文字";
                }
            }
            return dt1;
        }


        /// <summary>
        /// 通过条件更新
        /// </summary>
        /// <param name="TableName"></param>
        /// <param name="update"></param>
        /// <param name="condition"></param>
        public string UpdateByCondition(string TableName, string update, string condition)
        {
            string sql = "update " + TableName + " set " + update + " where " + condition;
            command = new OracleCommand(sql, connection);
            Console.WriteLine(sql);
            Reconnect(command);
            try
            {
                command.ExecuteNonQuery();
            }
            catch (Exception)
            {
                command.Connection = new OracleConnection(DBConnectionString);
                command.Connection.Open();
                command.ExecuteNonQuery();
            }

            return sql;
        }

        /// <summary>
        /// 调用存储过程
        /// </summary>
        /// <param name="ProcedureName"></param>    
        /// <param name="param"></param>
        public void CallProcedure(string ProcedureName, ref string[] param)
        {
            command = new OracleCommand(ProcedureName);
            command.Connection = connection;
            Reconnect(command);
            command.CommandText = ProcedureName;
            command.CommandType = CommandType.StoredProcedure;
            for (int i = 0; i < param.Length; i++)
                command.Parameters.Add(new OracleParameter(param[i].ToString(), OracleDbType.Varchar2, 4000, param[i], ParameterDirection.InputOutput));
            try
            {
                command.ExecuteNonQuery();
            }
            catch (Exception)
            {
                command.Connection = new OracleConnection(DBConnectionString);
                command.Connection.Open();
                command.ExecuteNonQuery();
            }
            for (int i = 0; i < command.Parameters.Count; i++)
                param[i] = command.Parameters[i].Value.ToString();

        }


        public void CallProcedure(string ProcedureName, string[] ParamName, ref string[] param)
        {
            command = new OracleCommand(ProcedureName);
            command.Connection = connection;
            Reconnect(command);
            command.CommandText = ProcedureName;
            command.CommandType = CommandType.StoredProcedure;
            for (int i = 0; i < param.Length; i++)
            {
                command.Parameters.Add(new OracleParameter(ParamName[i], OracleDbType.Varchar2, 200, param[i], ParameterDirection.InputOutput));
                //command.Parameters.Add(new OracleParameter(ParamName[i], OracleType.VarChar, 200, ParameterDirection.InputOutput, "", DataRowVersion.Default, true, param[i]));
            }
            try
            {
                command.ExecuteNonQuery();
            }
            catch (Exception)
            {
                command.Connection = new OracleConnection(ConnectionStrings);
                command.Connection.Open();
                command.ExecuteNonQuery();
            }
            for (int i = 0; i < command.Parameters.Count; i++)
                param[i] = command.Parameters[i].Value.ToString();

        }

        /// <summary>
        /// 出现异常进行回滚的执行方法
        /// </summary>
        /// <param name="SQL"></param>
        public void ExecuteSQLTran(params string[] SQL)
        {
            OracleTransaction tx = connection.BeginTransaction();
            command = new OracleCommand();
            command.Connection = connection;
            command.Transaction = tx;
            try
            {
                foreach (string sql in SQL)
                {

                    if (!String.IsNullOrEmpty(sql))
                    {
                        Console.WriteLine(sql);
                        command.CommandText = sql;
                        try
                        {
                            command.ExecuteNonQuery();
                        }
                        catch (Exception)
                        {
                            command.Connection = new OracleConnection(DBConnectionString);
                            command.Connection.Open();
                            command.ExecuteNonQuery();
                        }
                    }
                }
                tx.Commit();
            }
            catch (Exception E)
            {
                tx.Rollback();
                throw new Exception(E.Message);
            }

        }

        /// <summary>
        /// 用于将string 的数组转换成SQL的查询内容
        /// </summary>
        /// <param name="Fields"></param>
        /// <returns></returns>
        private string AddField(string[] Fields)
        {
            string sql = " ";
            foreach (string field in Fields)
            {
                sql += field + ",";
            }
            return sql.Substring(0, sql.Length - 1);
        }
        /// <summary>
        /// 通过查询的内容获取到字段的描述
        /// </summary>
        /// <param name="field"></param>
        /// <returns></returns>
        private static string[] GetCaptionFromField(string field)
        {
            string[] caption = field.Split(',');
            for (int i = 0; i < caption.Length; i++)
            {
                caption[i] = caption[i].Substring(0, caption[i].LastIndexOf("as")).Trim();
            }
            return caption;
        }

        /// <summary>
        /// 通过查询的语句获取查询的字段
        /// </summary>
        /// <param name="field"></param>
        /// <returns></returns>
        private static string[] GetField(string field)
        {
            string[] fields = field.Split(',');
            for (int i = 0; i < fields.Length; i++)
            {
                fields[i] = fields[i].Substring(fields[i].LastIndexOf("as") + 2, fields[i].Length - fields[i].LastIndexOf("as") - 2).Trim();
            }
            return fields;
        }

        public object GetLabelParam(string sql)
        {
            DataTable dt = new DataTable();
            command = new OracleCommand(sql, connection);
            Reconnect(command);
            OracleDataAdapter ad = new OracleDataAdapter();
            ad.SelectCommand = command;
            try
            {
                ad.Fill(dt);
            }
            catch (Exception)
            {
                connection = new OracleConnection(DBConnectionString);
                connection.Open();
                command = new OracleCommand(sql, connection);
                ad = new OracleDataAdapter();
                ad.SelectCommand = command;
                ad.Fill(dt);
            }
            if (dt.Rows.Count > 0)
            {
                ad.Dispose();

                return dt.Rows[0][0];
            }
            else
            {

                return "";
            }
        }

        public static string[] GetParamFromSQL(string SQL)
        {
            string[] par = SQL.Split(':');
            //用来存参数的数组
            StringBuilder[] addpar = new StringBuilder[par.Length - 1];
            string[] param = new string[par.Length - 1];
            for (int i = 0; i < par.Length - 1; i++)
            {
                //新建一个char类型的数组用来存储每个字节的变量
                char[] c = par[i + 1].ToCharArray();
                addpar[i] = new StringBuilder();

                for (int j = 0; j < c.Length; j++)
                {
                    if (c[j] != ' ' && c[j] != ',' && c[j] != ')')
                    {
                        addpar[i].Append(c[j]);
                    }
                    else
                    {
                        break;
                    }
                }
            }
            for (int i = 0; i < par.Length - 1; i++)
            {
                param[i] = addpar[i].ToString();
            }
            return param;
        }

        public void Dispose()
        {
            //command 为实例字段,可安全释放
            if (command != null)
            {
                try { command.Dispose(); } catch (Exception) { }
                command = null;
            }
            //connection 为 static 共享对象,开启连接池后由连接池统一管理生命周期,
            //此处不主动 Close 以避免影响其它正在使用该连接的实例
        }

        private void Reconnect(OracleCommand cmd)
        {
            //先确保连接对象存在,避免null引用
            if (cmd.Connection == null)
            {
                cmd.Connection = new OracleConnection(string.IsNullOrEmpty(DBConnectionString) ? ConnectionStrings : DBConnectionString);
            }
            ConnectionState state = cmd.Connection.State;
            //Closed/Broken 才需要重连,正常状态直接返回,减少无谓的异常触发
            if (state == ConnectionState.Closed || state == ConnectionState.Broken)
            {
                try
                {
                    if (state == ConnectionState.Broken)
                    {
                        cmd.Connection.Close();
                    }
                    cmd.Connection.Open();
                    LogManager.DoLog("连接状态异常(" + state + ")已重连");
                }
                catch (Exception ex)
                {
                    LogManager.DoLog("重连失败:" + ex.Message);
                    throw;
                }
            }
        }
    }
}