/// <summary>
        /// 初始化 com.individual.helper.ComDbParameter 类的新实例
        /// </summary>
        /// <param name="DataBaseType">数据库类型</param>
        /// <param name="ParameterName">参数名称</param>
        /// <param name="DbType">参数数据类型</param>
        /// <param name="Value">参数值</param>
        /// <param name="Direction">该值指示参数是只可输入、只可输出、双向还是存储过程返回值参数,System.Data.ParameterDirection 值之一</param>
        public static DbParameter CreateDbParameter(DataBaseType DataBaseType, string ParameterName, DbParameterType DbType, object Value, ParameterDirection Direction)
        {
            if (DataBaseType == helper.DataBaseType.Access)
            {
                System.Data.OleDb.OleDbParameter param = new System.Data.OleDb.OleDbParameter(ParameterName, GetOleDbType(DbType));
                param.Direction = Direction;
                param.Value = Value;
                param.Size = 8000;
                return param;
            }
            else if (DataBaseType == helper.DataBaseType.MySql)
            {
                MySql.Data.MySqlClient.MySqlParameter param = new MySql.Data.MySqlClient.MySqlParameter(ParameterName, GetMySqlDbType(DbType));
                param.Direction = Direction;
                param.Value = Value;
                param.Size = 8000;
                return param;
            }

            else if (DataBaseType == helper.DataBaseType.Oracle)
            {
                System.Data.OracleClient.OracleParameter param = new System.Data.OracleClient.OracleParameter(ParameterName, GetOracleType(DbType));
                param.Direction = Direction;
                param.Value = Value;
                param.Size = 8000;
                return param;
            }
            else
            {
                System.Data.SqlClient.SqlParameter param = new System.Data.SqlClient.SqlParameter(ParameterName, GetSqlDbType(DbType));

                param.Direction = Direction;
                param.Value = Value;
                param.Size = 8000;
                return param;
            }
        }
 private static System.Data.SqlDbType GetSqlDbType(DbParameterType DbType)
 {
     if (DbType == DbParameterType.DateTime)
     {
         return System.Data.SqlDbType.DateTime;
     }
     else if (DbType == DbParameterType.Float)
     {
         return System.Data.SqlDbType.Float;
     }
     else if (DbType == DbParameterType.Int)
     {
         return System.Data.SqlDbType.Int;
     }
     else
     {
         return System.Data.SqlDbType.VarChar;
     }
 }
 private static System.Data.OracleClient.OracleType GetOracleType(DbParameterType DbType)
 {
     if (DbType == DbParameterType.DateTime)
     {
         return System.Data.OracleClient.OracleType.DateTime;
     }
     else if (DbType == DbParameterType.Float)
     {
         return System.Data.OracleClient.OracleType.Float;
     }
     else if (DbType == DbParameterType.Int)
     {
         return System.Data.OracleClient.OracleType.Int32;
     }
     else
     {
         return System.Data.OracleClient.OracleType.VarChar;
     }
 }
 private static System.Data.OleDb.OleDbType GetOleDbType(DbParameterType DbType)
 {
     if (DbType == DbParameterType.DateTime)
     {
         return System.Data.OleDb.OleDbType.DBTimeStamp;
     }
     else if (DbType == DbParameterType.Float)
     {
         return System.Data.OleDb.OleDbType.Double;
     }
     else if (DbType == DbParameterType.Int)
     {
         return System.Data.OleDb.OleDbType.Integer;
     }
     else
     {
         return System.Data.OleDb.OleDbType.VarChar;
     }
 }
 private static MySql.Data.MySqlClient.MySqlDbType GetMySqlDbType(DbParameterType DbType)
 {
     if (DbType == DbParameterType.DateTime)
     {
         return MySql.Data.MySqlClient.MySqlDbType.DateTime;
     }
     else if (DbType == DbParameterType.Float)
     {
         return MySql.Data.MySqlClient.MySqlDbType.Float;
     }
     else if (DbType == DbParameterType.Int)
     {
         return MySql.Data.MySqlClient.MySqlDbType.Int32;
     }
     else
     {
         return MySql.Data.MySqlClient.MySqlDbType.String;
     }
 }