Q: convert to numbers

[Guest]

Hello,

string newStr=myStr.Substring(1,3);
int newNum = System.Convert.ToInt32(newStr);

This fails if newStr does not have all characters as numbers. How can you do
this in a professional way?

Thanks,
Jim.

 

[Norman Yuan]

int newNum;
try
{
newNum=Convert.ToInt32(newStr);
}
cacth
{
newNum=0; //Or other default value
}

 

[Kevin Spencer]

You can check if it is a number by using Int32.Parse() and a try/catch. If
it raises an exception, you handle it and it isn't a number.

--
HTH,

Kevin Spencer
Microsoft MVP
..Net Developer
Ambiguity has a certain quality to it.

 

[Scott Allen]

You'll have to place the Convert.ToInt32 call inside of a try / catch
block. In 2.0 there will be TryParse methods that don't throw.

 

[Scott Allen]

.... or write your own IsNumeric method ...