I have a member variable of a class of type "int", and while assigning
value to it in a constructor, I want to check whether it is a null. I
am using following code:
if (NewMember.BPLNo == null)
NewMember.BPLNo = 0;
But, Visual Studio 2005 is giving warning that variables with type
'int' cannot be 'null'. How to check this?
I also want to know is there any functions like IsNumeric, IsString
etc. in C#. 4 5050
RP wrote:
I have a member variable of a class of type "int", and while assigning
value to it in a constructor, I want to check whether it is a null. I
am using following code:
if (NewMember.BPLNo == null)
NewMember.BPLNo = 0;
But, Visual Studio 2005 is giving warning that variables with type
'int' cannot be 'null'. How to check this?
I also want to know is there any functions like IsNumeric, IsString
etc. in C#.
No need to check, because int can not be null.
int? can be null if you need the capability.
Arne
"Arne Vajhøj" <ar**@vajhoej.dkwrote in message
news:47***********************@news.sunsite.dk...
RP wrote:
>I have a member variable of a class of type "int", and while assigning value to it in a constructor, I want to check whether it is a null. I am using following code:
if (NewMember.BPLNo == null) NewMember.BPLNo = 0;
But, Visual Studio 2005 is giving warning that variables with type 'int' cannot be 'null'. How to check this?
I also want to know is there any functions like IsNumeric, IsString etc. in C#.
No need to check, because int can not be null.
int? can be null if you need the capability.
Arne
if(NewMember.BPLNo.GetType()==typeof(String)
...
if(NewMember.BPLNo.GetType().IsValueType) or IsClass etc ..
...
Colin =^.^=
Cif(NewMember.BPLNo.GetType().IsValueType) or IsClass etc ..
If you start down the reflection road you need to be very careful;
int? (Nullable<int>) is a value-type, and is nullable depending on
your definition of nullable. Also you'd need to watch for the BPLNo
being null - but in general, the reflection approach is only needed if
you don't know what your data is - either because of "object", or
perhaps because of generics. In the case of a property this seems
overkill. Especially for an int property where there is no real
question of nullability.
Marc
"RP" <rp*********@gmail.comwrote in message
news:11**********************@e34g2000pro.googlegr oups.com...
>I have a member variable of a class of type "int", and while assigning
value to it in a constructor, I want to check whether it is a null. I
am using following code:
All memory is zero-filled before the constructor runs, this means that
references become "null" and numeric variables become zero.
>
if (NewMember.BPLNo == null)
NewMember.BPLNo = 0;
But, Visual Studio 2005 is giving warning that variables with type
'int' cannot be 'null'. How to check this?
I also want to know is there any functions like IsNumeric, IsString
etc. in C#.
Perhaps you want the TryParse function of int/long/float/double/decimal for
validation of strings that are supposed to be numbers? This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics
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