Conversion Myth

 

Input	Output
Object obj = null;
string str1 = Convert.ToString(obj);	“”  (Blank)
string str2 = obj as string;	Null
string str3 = obj.ToString();	Exception – Object Reference not set to an instance of an object

 

 

Input	Output
Int? obj = null;
string str1 = Convert.ToString(obj);	“”  (Blank)
string str2 = obj.ToString();	“”  (Blank)

 

 

Input	Output
Int obj = 0;
string str1 = Convert.ToString(obj);	0
string str2 = obj.ToString();	0

 

 

Input	Output
string str = “”; int i = Convert.ToInt32(str);	Exception  - Input string was not in a correct format
string str = “A”; int i = Convert.ToInt32(str);	Exception  - Input string was not in a correct format
string str = null; int i = Convert.ToInt32(str);	0

 

 

Input	Output
string str = “”; int i = Int32.Parse (str);	Exception  - Input string was not in a correct format
string str = “A”; int i = Int32.Parse (str);	Exception  - Input string was not in a correct format
string str = null; int i = Int32.Parse (str);	Exception  - Value cannot be null.

 

 

Input string was not in a correct format.

 

 

 

Thanks & Regards,

Arun Manglick || Senior Tech Lead