Remove Special Characters From A Mobile Number With C#

Here is the code snippet to remove special characters from a mobile number and just get numbers only.

Sometimes, we need to remove all special characters from a mobile number and store just numbers only. The simplest way to do so is, look for the special characters and remove them from the number. 

 

Here is a method that removes special characters, space, +, and - from a number. You can use the same approach to remove any character a number. If your string has other characters, add them to this list.  

private string convert_to_number(string No)
{
string mobileno = "";
//remove special characters
foreach (char ch in No)
{
if (ch != ' ' && ch != '+' && ch != '-')
{
mobileno = mobileno + ch.ToString();
}
}
//convert to 10 digit
if (mobileno.Length > 10)
{
mobileno = mobileno.Substring(mobileno.Length - 10, 10);
}
return (mobileno);
}

Another way to validate a mobile number is to use a regular expression. Here is the mobile number validation regular expression: 

Regular expression:

/ ^((\+){0,1}91(\s){0,1}(\-){0,1}(\s){0,1}){0,1}9[0-9](\s){0,1}(\-){0,1}(\s){0,1}[1-9]{1}[0-9]{7}$/ (without +91 or 0)

/^((\\+91-?)|0)?[0-9]{10}$/ (with or without +91 or 0)

^((\\+|00)(\\d{1,3})[\\s-]?)?(\\d{10})$/ (split the number and the country code)

Here are more detailed tutorials on the same:

 

List of Most Common Regular Expressions and Their Usage 

Top C# Regex Code Examples