substring numeric value of a string

[arial]

Hi all,

I need some help from you expert. I need to extract numeric value of a string.

for ext: string str = "1234 absc st" or it can be "123 hello world"
or "1234567 asp.net"


How can i only get the numeric part of the string?

Please help and give me some suggestions.

Thank you,

[Kapps]

One potential way would be to go through each char in the string, and check if it's numeric. If it is, add it on to a temporary string, which is then returned. I'm not sure how efficient this is however.

[Curtis Rutland]

Regular expressions would probably be useful for this.

I'm not good with RegEx myself, so I can't give you a sample, but maybe someone else can help with that.

[chelvan]

hi

you always find a space after your numeric value on your string. so its simple, first you find the position of the space , then you able to copy your numeric value by using substring.

regards
chel-1

[artov]

If the number is at the first, you might like to use Split method using space
as separator, the Parse (or better yet, TryParse) to get the value.

[chelvan]

split your string into an string array by space position. then convert your array element into integer. exception will throws when you cast the string. only one array element never throws exception thats element holds your answer.

chel-1

[tlhintoq]

string MyAddress = "123 N. Main Street";
int HouseNumber = Convert.ToInt32(MyAddress.Substring(0, MyAddress.IndexOf(' ')));
MessageBox.Show(HouseNumber.ToString(), "House number");
 

Give this a try.
Its up to you to beef it up, give it some value qualification and error handling. But should point you in a workable direction.

[chelvan]

string MyAddress = "123 N. Main Street";
int HouseNumber = Convert.ToInt32(MyAddress.Substring(0, MyAddress.IndexOf(' ')));
MessageBox.Show(HouseNumber.ToString(), "House number");
 

Give this a try.
Its up to you to beef it up, give it some value qualification and error handling. But should point you in a workable direction.

hi its right.
but my question is whats your idea
when the string value turn to like this "abc 14526 kio mk";

chel-1

[r035198x]

Have a look at

string s = "56ttt777";
foreach(string strItem in Regex.Split(s,"\\D")){
    Console.WriteLine(strItem);
}

You'd need use System.Text.Reg ularExpressions of course.

[arial]

Thank you all for all your suggetion.

like chel-1 said i need to make sure it works both way,
123 abc and abnd 345 edf.

I will give a try to your suggetion and let you all know what happens.

Thank You,