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

namespace KGIS.Plugin.DataChanging
{
    public static class ExtendMethd
    {
        public static string ToTrim(this object value)
        {
            if (value == null || value == DBNull.Value)
                return string.Empty;
            return value.ToString().Trim();
        }
        public static double ToDouble(this object value)
        {
            if (value == null)
                return 0;
            double result;
            double.TryParse(value.ToString(), out result);
            return result;
        }

        public static int GetIntByObject(object obj)
        {
            int iTemp = 0;
            try
            {
                iTemp = JudgeIsCouldConversionInt(obj) == true ? Convert.ToInt32(obj) : 0;
                return iTemp;
            }
            catch (Exception ex)
            {
                return 0;
            }
        }

        private static bool JudgeIsCouldConversionInt(object sTheValue)
        {
            try
            {
                if (sTheValue == null)
                {
                    return false;
                }
                else
                {
                    if (string.IsNullOrWhiteSpace(sTheValue.ToString()) == true)
                    {
                        return false;
                    }
                    else
                    {
                        int iTemp = 0;
                        if (int.TryParse(sTheValue.ToString(), out iTemp) == false)
                        {
                            return false;
                        }
                        else
                        {
                            return true;
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                return false;
            }
        }

        public static double ToDouble(this object value, int w)
        {
            if (value == null)
                return 0;
            double result;
            double.TryParse(value.ToString(), out result);
            if (result > 0)
            {
                result = Math.Round(result, w, MidpointRounding.AwayFromZero);
            }
            return result;
        }

        public static decimal ToDecimal(this object value)
        {
            if (value == null)
                return 0;
            decimal result;
            decimal.TryParse(value.ToString(), out result);
            return result;
        }

        public static decimal ToDecimal(this object value, int w)
        {
            if (value == null)
                return 0;
            decimal result;
            decimal.TryParse(value.ToString(), out result);
            if (result > 0)
            {
                result = Math.Round(result, w, MidpointRounding.AwayFromZero);
            }
            return result;
        }
    }
}