51 lines
1.4 KiB
C#
51 lines
1.4 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace Nullable_types
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{
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class Program
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{
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static void Main(string[] args)
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{
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//DateTime date = null; //datetime is nott nullable
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//Nullable<DateTime> ndate = null;
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DateTime? nullable_date = null;
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/*
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Console.WriteLine("GetValueOrDefault(): " + nullable_date.GetValueOrDefault());
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Console.WriteLine("HasValue: " + nullable_date.HasValue);
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Console.WriteLine("Value: " + nullable_date.Value);
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*/
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nullable_date = new DateTime(2014, 1, 1);
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//DateTime date2 = nullable_date;
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DateTime date2 = nullable_date.GetValueOrDefault();
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DateTime? date3 = date2;
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Console.WriteLine(date2);
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Console.WriteLine(date3.GetValueOrDefault());
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DateTime date4;
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//Method 1
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if (nullable_date != null)
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date4 = nullable_date.GetValueOrDefault();
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else
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date4 = DateTime.Today;
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Console.WriteLine(date4);
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//Method 2
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DateTime date5 = nullable_date ?? DateTime.Today;
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Console.WriteLine(date5);
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DateTime date6 = (nullable_date != null) ? nullable_date.GetValueOrDefault() : DateTime.Today;
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Console.WriteLine(date6);
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}
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}
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}
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