Parsing Strings in C#

[raghu75]

Hi,
I have to parse a few strings in C#. The strings are AlphaNumeric.i.e. they contain characters and numerals.
I want to pick only the numerals in the string.
is there any way to do it???

ex: string MyStr = "ragh1210";
I want to extract 1210 from the above.How can this be done??

Rgds,
raghu

 

[MaryDia]

You can use some of the Char methods to parse the string(
Char.IsLetter, Char.IsNumber, Char.IsPunctuation, Char.IsSeparator, Char.IsWhiteSpace....).
And a short example:

String s = "123sgjhfg";
String s1 = "";
for(int i=0; i < s.Length;i++)
{
if(Char.IsNumber(s,i))
{
s1 = s1 + s;
}
}

 

[Larsson]

Even better if you use StringBuilder instead of String for s1.

String s = &quot;123sgjhfg&quot;;
String result;
StringBuilder s1 = new StringBuilder();
for(int i=0; i < s.Length;i++)
{
if(Char.IsNumber(s,i))
{
s1 += s;
}
}
result = s1.ToString();


It has better memory usage.
String creates a new object each time you append something to it.
StringBuilder does not.

Larsson