Purpose of Convert.Tostring() and .ToString()

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hi friends

i am using winform application,in converting concepts when i am using Conver.ToSring() and .ToString().can you please explain me.

Thanking U.

Posted 16-Jul-12 20:45pm

Shekar Raja

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Rajesh Buddaraju · Accepted Answer · 2012-07-16T20:48:00

Solution 2

Convert.ToString() it will handle the null exceptions and using .ToString() It won't handle the null exceptions.

find below,

C#

Object obj = null;
String objValue1 = obj.ToString(); //throws Null reference exception
String objValue2 = Convert.ToString(obj);  //returns NULL

:)

Posted 16-Jul-12 20:48pm

Rajesh Buddaraju

*Suvabrata Roy* · Accepted Answer · 2012-07-16T21:03:00

Hi Sheker,

Main difference is each class base class is Object class, and object class has few methods and ToString() is one of them you can write overload and override .

So when you call object.ToString() its mean it will call that objects ToString
there for if object is null then it will throw an exception Object is not set to an instance of an object.

Where as In Convert.ToString method, Convert is a static class where we pass our object and get the out put in that method its check where the object is null or no if not the call that objects ToString method other wise return null.

This is the main difference Now you could understand why this behavioral difference

C#

object objec = null;
string objValue1 = objec .ToString(); //Exception
string objValue2 = Convert.ToString(objec); //return Null

Rahul Rajat Singh · Accepted Answer · 2012-07-16T20:46:00

Solution 1

this link has answer with very good explanation:

http://social.msdn.microsoft.com/Forums/en-US/csharpgeneral/thread/ca084595-8502-4efe-b4be-d52ccb7d63c4/[^]

Posted 16-Jul-12 20:46pm

Rahul Rajat Singh

sanwar_mal_jat · Accepted Answer · 2012-07-16T20:52:00

Solution 3

Hello dude .............

C#

object objec = null;
string objValue1 = objec .ToString(); //It is does not handle Null Value and throws Null reference exception
string objValue2 = Convert.ToString(objec); //It is  handle Null Value and  output Null

Posted 16-Jul-12 20:52pm

sanwar_mal_jat

Updated 16-Jul-12 20:53pm

v2

Vani Kulkarni · Accepted Answer · 2012-07-16T20:54:00

Solution 4

Hello,

Please go throgh following links:
http://weblogs.asp.net/jgalloway/archive/2003/11/06/36308.aspx[^]
http://c-sharp-corner.blogspot.in/2011/09/difference-between-converttostring-and.html[^]

Posted 16-Jul-12 20:54pm

Vani Kulkarni

kk2014 · Accepted Answer · 2012-07-16T21:01:00

Solution 5

hi sekar raja,

the main difference bet. convert.tostring() and .tostring() is that convert.tostring()accept NULL values and returns it whereas .tostring() throws Null reference exception.

let me know if you have any query.

thanks...

Posted 16-Jul-12 21:01pm

kk2014