I have a problem, in an app I'm picking up contacts from the phonebook, however I want to make a treatment in the contact numbers that can come like this:
(99) 9999-9999
9999-9999
9999 9999
and among other things, the only treatment I did was to use a SubString to cut and pick only the last 8 characters of the number (to take operator etc), now how do I remove characters other than those string ? In the above example all numbers would look like this: 99999999
Someone will give a solution with RegEx, but I prefer this:
var texto = "(99) 9999-9999";
foreach (var chr in new string[] {"(", ")", "-", " " }) {
texo = texto.Replace(chr, "");
}
See working using extension method .
Obviously if you want to store this in the variable you need to store the method result again in the variable.
Can do more optimally. Example:
public static class StringExt {
public static string Replace(this string str, string newValue, params char[] chars) {
var sb = new StringBuilder();
foreach (var chr in str) {
if (!chars.Contains(chr)) {
sb.Append(chr);
} else {
sb.Append(newValue);
}
}
return sb.ToString();
}
}
See running on dotNetFiddle .
As predicted by @bigown, I'll show you the method using Regex .Replace () replacing everything in one line, feel free to choose how you want to work:
string strTexto = "(12) 3456-7890";
strTexto = Regex.Replace(strTexto, "[\(\)\-\ ]", "");
Console.WriteLine(strTexto);
Running on .NETFiddle: link