using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace CnasSynchronousCommon
{
    public class ConvertUtilType
    {
        #region ToInt32

        public static int? ToInt32(string obj)
        {
            return ToInt32(obj, null);
        }

        public static int? ToInt32(object obj)
        {
            return ToInt32(obj, null);
        }

        public static int? ToInt32(object obj, int? defaultValue)
        {
            if (obj == DBNull.Value || obj == null)
            {
                return defaultValue;
            }

            return ToInt32(Convert.ToString(obj), defaultValue);
        }

        public static int? ToInt32(string obj, int? defaultValue)
        {
            if (string.IsNullOrEmpty(obj))
            {
                return defaultValue;
            }

            int outValue;

            if (int.TryParse(obj, out outValue))
            {
                return outValue;
            }
            else
            {
                return defaultValue;
            }
        }

        #endregion

        #region ToInt16

        public static short? ToInt16(string obj)
        {
            return ToInt16(obj, null);
        }

        public static short? ToInt16(object obj)
        {
            return ToInt16(obj, null);
        }

        public static short? ToInt16(object obj, short? defaultValue)
        {
            if (obj == DBNull.Value || obj == null)
            {
                return defaultValue;
            }

            return ToInt16(Convert.ToString(obj), defaultValue);
        }

        public static short? ToInt16(string obj, short? defaultValue)
        {
            if (string.IsNullOrEmpty(obj))
            {
                return defaultValue;
            }

            short outValue;

            if (short.TryParse(obj, out outValue))
            {
                return outValue;
            }
            else
            {
                return defaultValue;
            }
        }

        #endregion

        #region ToInt64

        public static long? ToInt64(string obj)
        {
            return ToInt64(obj, null);
        }

        public static long? ToInt64(object obj)
        {
            return ToInt64(obj, null);
        }

        public static long? ToInt64(object obj, long? defaultValue)
        {
            if (obj == DBNull.Value || obj == null)
            {
                return defaultValue;
            }

            return ToInt64(Convert.ToString(obj), defaultValue);
        }

        public static long? ToInt64(string obj, long? defaultValue)
        {
            if (string.IsNullOrEmpty(obj))
            {
                return defaultValue;
            }

            long outValue;

            if (long.TryParse(obj, out outValue))
            {
                return outValue;
            }
            else
            {
                return defaultValue;
            }
        }

        #endregion

        #region ToUInt32

        public static uint? ToUInt32(string obj)
        {
            return ToUInt32(obj, null);
        }

        public static uint? ToUInt32(object obj)
        {
            return ToUInt32(obj, null);
        }

        public static uint? ToUInt32(object obj, uint? defaultValue)
        {
            if (obj == DBNull.Value || obj == null)
            {
                return defaultValue;
            }

            return ToUInt32(Convert.ToString(obj), defaultValue);
        }

        public static uint? ToUInt32(string obj, uint? defaultValue)
        {
            if (string.IsNullOrEmpty(obj))
            {
                return defaultValue;
            }

            uint outValue;

            if (uint.TryParse(obj, out outValue))
            {
                return outValue;
            }
            else
            {
                return defaultValue;
            }
        }

        #endregion

        #region ToUInt16

        public static ushort? ToUInt16(string obj)
        {
            return ToUInt16(obj, null);
        }

        public static ushort? ToUInt16(object obj)
        {
            return ToUInt16(obj, null);
        }

        public static ushort? ToUInt16(object obj, ushort? defaultValue)
        {
            if (obj == DBNull.Value || obj == null)
            {
                return defaultValue;
            }

            return ToUInt16(Convert.ToString(obj), defaultValue);
        }

        public static ushort? ToUInt16(string obj, ushort? defaultValue)
        {
            if (string.IsNullOrEmpty(obj))
            {
                return defaultValue;
            }

            ushort outValue;

            if (ushort.TryParse(obj, out outValue))
            {
                return outValue;
            }
            else
            {
                return defaultValue;
            }
        }

        #endregion

        #region ToUInt64

        public static ulong? ToUInt64(string obj)
        {
            return ToUInt64(obj, null);
        }

        public static ulong? ToUInt64(object obj)
        {
            return ToUInt64(obj, null);
        }

        public static ulong? ToUInt64(object obj, ulong? defaultValue)
        {
            if (obj == DBNull.Value || obj == null)
            {
                return defaultValue;
            }

            return ToUInt64(Convert.ToString(obj), defaultValue);
        }

        public static ulong? ToUInt64(string obj, ulong? defaultValue)
        {
            if (string.IsNullOrEmpty(obj))
            {
                return defaultValue;
            }

            ulong outValue;

            if (ulong.TryParse(obj, out outValue))
            {
                return outValue;
            }
            else
            {
                return defaultValue;
            }
        }

        #endregion

        #region ToDateTime

        public static DateTime? ToDateTime(string obj)
        {
            return ToDateTime(obj, null);
        }

        public static DateTime? ToDateTime(object obj)
        {
            return ToDateTime(obj, null);
        }

        public static DateTime? ToDateTime(object obj, DateTime? defaultValue)
        {
            if (obj == DBNull.Value || obj == null || obj.Equals(""))
            {
                return defaultValue;
            }
            return Convert.ToDateTime(Convert.ToDateTime(obj).ToString("yyyy-MM-dd HH:mm"));
            //return ToDateTime(Convert.ToString(obj), defaultValue);
        }

        public static DateTime? ToDateTime(string obj, DateTime? defaultValue)
        {
            if (string.IsNullOrEmpty(obj))
            {
                return defaultValue;
            }

            DateTime outValue;

            if (DateTime.TryParse(obj, out outValue))
            {
                return outValue;
            }
            else
            {
                return defaultValue;
            }
        }

        #endregion

        #region ToBoolean

        public static bool? ToBoolean(string obj)
        {
            return ToBoolean(obj, null);
        }

        public static bool? ToBoolean(object obj)
        {
            return ToBoolean(obj, null);
        }

        public static bool? ToBoolean(object obj, bool? defaultValue)
        {
            if (obj == DBNull.Value || obj == null)
            {
                return defaultValue;
            }

            return ToBoolean(Convert.ToString(obj), defaultValue);
        }

        public static bool? ToBoolean(string obj, bool? defaultValue)
        {
            if (!string.IsNullOrEmpty(obj))
            {
                bool flag;
                if (bool.TryParse(obj, out flag))
                {
                    return new bool?(flag);
                }
                if (obj == "1")
                {
                    return true;
                }
                if (obj == "0")
                {
                    return false;
                }
            }
            return defaultValue;

        }

        #endregion

        #region ToString

        public static string ToString(object obj)
        {
            return ToString(obj, null);
        }

        public static string ToString(object obj, string defaultValue)
        {
            if (obj == DBNull.Value || obj == null)
            {
                return defaultValue;
            }

            return System.Convert.ToString(obj);
        }

        public static string ToDateString(DateTime? obj, string defaultValue)
        {
            if (obj == null)
            {
                return defaultValue;
            }

            return obj.Value.ToString("yyyy-MM-dd");
        }

        public static string ToDateString(object obj, string defaultValue)
        {
            if (obj == DBNull.Value || obj == null)
            {
                return defaultValue;
            }

            DateTime? dateTime = ToDateTime(obj);

            return ToDateString(dateTime, defaultValue);
        }


        #endregion

        #region ToByte

        public static byte? ToByte(string obj)
        {
            return ToByte(obj, null);
        }

        public static byte? ToByte(object obj)
        {
            return ToByte(obj, null);
        }

        public static byte? ToByte(object obj, byte? defaultValue)
        {
            if (obj == DBNull.Value || obj == null)
            {
                return defaultValue;
            }

            return ToByte(Convert.ToString(obj), defaultValue);
        }

        public static byte? ToByte(string obj, byte? defaultValue)
        {
            if (string.IsNullOrEmpty(obj))
            {
                return defaultValue;
            }

            byte outValue;

            if (byte.TryParse(obj, out outValue))
            {
                return outValue;
            }
            else
            {
                return defaultValue;
            }
        }

        #endregion

        #region ToSByte

        public static sbyte? ToSByte(string obj)
        {
            return ToSByte(obj, null);
        }

        public static sbyte? ToSByte(object obj)
        {
            return ToSByte(obj, null);
        }

        public static sbyte? ToSByte(object obj, sbyte? defaultValue)
        {
            if (obj == DBNull.Value || obj == null)
            {
                return defaultValue;
            }

            return ToSByte(Convert.ToString(obj), defaultValue);
        }

        public static sbyte? ToSByte(string obj, sbyte? defaultValue)
        {
            if (string.IsNullOrEmpty(obj))
            {
                return defaultValue;
            }

            sbyte outValue;

            if (sbyte.TryParse(obj, out outValue))
            {
                return outValue;
            }
            else
            {
                return defaultValue;
            }
        }

        #endregion

        #region ToDouble

        public static double? ToDouble(string obj)
        {
            return ToDouble(obj, null);
        }

        public static double? ToDouble(object obj)
        {
            return ToDouble(obj, null);
        }

        public static double? ToDouble(object obj, double? defaultValue)
        {
            if (obj == DBNull.Value || obj == null)
            {
                return defaultValue;
            }

            return ToDouble(Convert.ToString(obj), defaultValue);
        }

        public static double? ToDouble(string obj, double? defaultValue)
        {
            if (string.IsNullOrEmpty(obj))
            {
                return defaultValue;
            }

            double outValue;

            if (double.TryParse(obj, out outValue))
            {
                return outValue;
            }
            else
            {
                return defaultValue;
            }
        }

        #endregion

        #region ToSingle

        public static Single? ToSingle(string obj)
        {
            return ToSingle(obj, null);
        }

        public static Single? ToSingle(object obj)
        {
            return ToSingle(obj, null);
        }

        public static Single? ToSingle(object obj, Single? defaultValue)
        {
            if (obj == DBNull.Value || obj == null)
            {
                return defaultValue;
            }

            return ToSingle(Convert.ToString(obj), defaultValue);
        }

        public static Single? ToSingle(string obj, Single? defaultValue)
        {
            if (string.IsNullOrEmpty(obj))
            {
                return defaultValue;
            }

            Single outValue;

            if (Single.TryParse(obj, out outValue))
            {
                return outValue;
            }
            else
            {
                return defaultValue;
            }
        }

        #endregion

        #region ToChar

        public static char? ToChar(string obj)
        {
            return ToChar(obj, null);
        }

        public static char? ToChar(object obj)
        {
            return ToChar(obj, null);
        }

        public static char? ToChar(object obj, char? defaultValue)
        {
            if (obj == DBNull.Value || obj == null)
            {
                return defaultValue;
            }

            return ToChar(Convert.ToString(obj), defaultValue);
        }

        public static char? ToChar(string obj, char? defaultValue)
        {
            if (string.IsNullOrEmpty(obj))
            {
                return defaultValue;
            }

            char outValue;

            if (char.TryParse(obj, out outValue))
            {
                return outValue;
            }
            else
            {
                return defaultValue;
            }
        }

        #endregion

        #region ToDecimal

        public static decimal? ToDecimal(string obj)
        {
            return ToDecimal(obj, null);
        }

        public static decimal? ToDecimal(object obj)
        {
            return ToDecimal(obj, null);
        }

        public static decimal? ToDecimal(object obj, decimal? defaultValue)
        {
            if (obj == DBNull.Value || obj == null)
            {
                return defaultValue;
            }

            return ToDecimal(Convert.ToString(obj), defaultValue);
        }

        public static decimal? ToDecimal(string obj, decimal? defaultValue)
        {
            if (string.IsNullOrEmpty(obj))
            {
                return defaultValue;
            }

            decimal outValue;

            if (decimal.TryParse(obj, out outValue))
            {
                return outValue;
            }
            else
            {
                return defaultValue;
            }
        }

        #endregion

    }
}