Re: Convert a string which might be a number to an int
- From: "Bob Powell [MVP]" <bob@xxxxxxxxxxxxxxxxxxxxxxx>
- Date: Mon, 23 Jun 2008 18:39:55 +0200
Ok, well, the difference is that one returns zero (ConvertTo) and the other throws an exception.
The problem is that if you really want to know if the string was in the correct format then you need to catch an exception which to be honest is a bad technique. Exceptions should be, well, the exception, rather than the rule.
ConvertTo returns zero in the case of an error which is bad because every mathemetician will scream that zero is a real number and is valid on it's own.
Therefore, for best practices, TryParse satisfies the criteria of decoding the value as well as discovering whether the string was a perfectly valid zero or just some gibberish.
--
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Bob Powell [MVP]
Visual C#, System.Drawing
Ramuseco Limited .NET consulting
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"Tony" <johansson.andersson@xxxxxxxxx> wrote in message news:%234MlkJS1IHA.5728@xxxxxxxxxxxxxxxxxxxxxxx
Hello!
Yes TryParse seems to be better but just for curiosity does anyone have an
answer to my question.
//Tony
"Bob Powell [MVP]" <bob@xxxxxxxxxxxxxxxxxxxxxxx> skrev i meddelandet
news:DFBED3B0-0F14-42F3-ABDF-EC53D8D6E8E5@xxxxxxxxxxxxxxxx
Use TryParse
--
--
Bob Powell [MVP]
Visual C#, System.Drawing
Ramuseco Limited .NET consulting
http://www.ramuseco.com
Find great Windows Forms articles in Windows Forms Tips and Tricks
http://www.bobpowell.net/tipstricks.htm
Answer those GDI+ questions with the GDI+ FAQ
http://www.bobpowell.net/faqmain.htm
All new articles provide code in C# and VB.NET.
Subscribe to the RSS feeds provided and never miss a new article.
"Tony" <johansson.andersson@xxxxxxxxx> wrote in message
news:O7ZpWDS1IHA.3860@xxxxxxxxxxxxxxxxxxxxxxx
> Hello!
>
> It seems to me that both Int32.Parse(..) and Convert.ToInt32(...) > static
> methods works in exactly the same way.
> Both can throw an exeption.
>
> So is it any different at all between these two ?
>
> string input1 = Console.ReadLine();
> string input2 = Console.ReadLine();
>
> try
> {
> int number1 = Convert.ToInt32(input1);
> int number2 = int32.Parse(input2);
> }
> catch
> {...}
>
> //Tony
>
>
.
- References:
- Convert a string which might be a number to an int
- From: Tony
- Re: Convert a string which might be a number to an int
- From: Bob Powell [MVP]
- Re: Convert a string which might be a number to an int
- From: Tony
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