finding first occurence of number

Amruta Kirdat

15y2.2k.NET

i have a string like strValue = ID=\"Literal1"\" Text=\"This is example"....

now from above string i want to take first occurence of number i.e my output shuold be 1...

can anyone help me?

thx in advance

4 Replies

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Vijay Yadav15y ago
Accepted answer
Hi Amruta,

Try this:-

using System.Text.RegularExpressions;

Regex re = new Regex(@"\d+");
Match m = re.Match(strValue);
if (m.Success)
string num= m.Value;
0
Vulpes15y ago
Although it's far less elegant than regular expressions, you can also do this quite easily with traditional string parsing code:

var list = new List();
bool started = false;

foreach(char c in strValue)
{
   if(char.IsDigit(c))
   {
   if (!started) started = true;
   list.Add(c);
   }
   else if (started)
   {
   break;
   }
}
int number = -1; // default say if nothing found
if (list.Count > 0) number = int.Parse(new string(list.ToArray()));

The traditional code executes more quickly but, unless you're doing thousands of such extractions, I'd stick with Vijay's approach :)
0
Vijay Yadav15y ago
Hi Amruta,
Welcome!
0
Amruta Kirdat15y ago
Hi Vijay,

this is working...thx for ur reply...
0