Attempts to create date from string representation such as +7days or -2months - CSharp System

CSharp examples for System:DateTime Month

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Description

Attempts to create date from string representation such as +7days or -2months

Demo Code


using System;//  w ww . j av a  2  s .  c o m

public class Main{
        /// <summary>
        /// Attempts to create date from string representation such as +7days or -2months
        /// </summary>
        public static DateTime? GetCalculatedDateTime(object dateRepresentation)
        {
            try
            {
                string val = dateRepresentation.ToString().ToLower();
                if (val == "now")
                    return DateTime.Now;
                int integerVal = 0;
                bool isMinus = val.StartsWith("-");
                bool isPlus = val.StartsWith("+");
                val = val.Replace("-", "").Replace("+", "");
                if ((isMinus) || (isPlus))
                {
                    if (val.Contains("days"))
                    {
                        integerVal = val.Replace("days", "").ConvertToInt32(0);
                        if (integerVal != 0)
                            return (isMinus) ? DateTime.Now.AddDays(-integerVal) : DateTime.Now.AddDays(integerVal);
                    }
                    else if (val.Contains("months"))
                    {
                        integerVal = val.Replace("months", "").ConvertToInt32(0);
                        if (integerVal != 0)
                            return (isMinus) ? DateTime.Now.AddMonths(-integerVal) : DateTime.Now.AddDays(integerVal);
                    }
                    else if (val.Contains("years"))
                    {
                        integerVal = val.Replace("years", "").ConvertToInt32(0);
                        if (integerVal != 0)
                            return (isMinus) ? DateTime.Now.AddYears(-integerVal) : DateTime.Now.AddDays(integerVal);
                    }
                }

                return null;
            }
            catch (Exception)
            {
                return null;
            }
        }
}

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