How to set Int 0 to null in c#

Question

2.50/5 (2 votes)

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Dear All,

Please suggest some methods or example, to set Int = 0 to null and set the date also null if Int field is null or zero correspondingly in C#.

Posted 22-Jun-13 11:23am

Murugan.NM

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Comments

Bernhard Hiller 24-Jun-13 2:44am

Do you actually talk about inserting those values into a database?

3 solutions

Solution 1

Integers cannot be null unless you declare them specifically as a "nullable type" by adding the '?' Suffix to the declaration:

C#

int? myNullableInt = null;

Posted 22-Jun-13 11:53am

OriginalGriff

Comments

Ron Beyer 22-Jun-13 18:23pm

Yup, +5, although it should be noted once you create a nullable value type, its basically not a full value type anymore. You can't assign int x = myNullableInt, since this will create a compile error. You also can't pass it to a function without explicitly casting it.

Member 10959895 14-Nov-14 6:54am

h

OriginalGriff 14-Nov-14 7:08am

And is that supposed to mean something?
If so, what?

Afzaal Ahmad Zeeshan 14-Nov-14 7:46am

Maybe a laughter without the remaining "aha" ;P

OriginalGriff 14-Nov-14 7:50am

Maybe he means "hello", but he's a really, really, slow typist?

Afzaal Ahmad Zeeshan 14-Nov-14 7:55am

I wouldn't say that, maybe his connection timed out; or he timed out.

BillWoodruff 14-Nov-14 9:17am

Give him a break, OG, it took him over a year to type the first character; within a few years we may be able to deduce what the comment means.

Murugan.NM 15-Nov-14 0:43am

Solved Myself

Solution 4

You could also do something like:

C#

public class NullableIntExample
{
  private int i = 0;
  private DateTime dt = DateTime.Now;

  public int? I 
  {
    get
    { 
      if (this.i == 0)
      {   
        return null;
      }
      else
      {
         return this.i; 
      }
   }

  public DateTime? DT 
  {
    get
    { 
      if (this.i == 0)
      {   
        return null;
      }
      else
      {
         return this.dt; 
      }
   }

}

Posted 17-Nov-14 2:30am

Wastedtalent

Updated 17-Nov-14 2:36am

v2

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prashantmuli · Accepted Answer · 2014-11-14T00:52:00

Solution 3

Their are two ways to declare int as Nullable in c# .Net.

First one is
Nullable<int> i = null;

and the Second is
int? d = null;

Posted 14-Nov-14 0:52am

prashantmuli