Extract numbers from string to create digit only string in C#

Extract numbers from string to create digit only string in C#

To extract numbers from a string and create a digit-only string in C# you can use LINQ and regular expressions. Here's an example:

using System.Linq; using System.Text.RegularExpressions; string input = "ABC 1234 XYZ 5678"; string digitsOnly = new string(input.Where(c => char.IsDigit(c)).ToArray()); // Or use a regular expression to extract the digits: string digitsOnly2 = Regex.Replace(input, @"\D", "");

In this example, we're defining a string input that contains a mixture of letters and digits. We're using LINQ to extract only the digits from the string and create a new digit-only string. We're using the Where method to filter out all non-digit characters, and then using the ToArray method to convert the resulting IEnumerable<char> to a char[]. We're then using the new string(char[]) constructor to create a new string from the array.

Alternatively, we can use a regular expression to extract the digits from the input string. We're using the Regex.Replace method to replace all non-digit characters (\D) with an empty string.

Both of these approaches will produce a string containing only the digits from the input string. In this example, the resulting digit-only string will be "12345678".

Examples

  1. "C# extract digits from alphanumeric string"

    • Description: Learn how to extract digits from an alphanumeric string and create a digit-only string in C#.
    string alphanumericString = "abc123xyz"; string digitOnlyString = ExtractDigits(alphanumericString); 
    public static string ExtractDigits(string input) { string digitOnlyString = new string(input.Where(char.IsDigit).ToArray()); return digitOnlyString; }

  2. "C# remove non-numeric characters from a string"

    • Description: Explore code examples for removing non-numeric characters from a string in C#.
    string mixedString = "a1b2c3"; string numericOnlyString = RemoveNonNumericCharacters(mixedString); 
    public static string RemoveNonNumericCharacters(string input) { string numericOnlyString = new string(input.Where(char.IsDigit).ToArray()); return numericOnlyString; }

  3. "C# extract numbers from a sentence"

    • Description: Learn how to extract numbers from a sentence and create a digit-only string in C#.
    string sentence = "There are 42 apples in the basket."; string numbersOnlyString = ExtractNumbersFromSentence(sentence); 
    public static string ExtractNumbersFromSentence(string input) { string numbersOnlyString = new string(input.Where(char.IsDigit).ToArray()); return numbersOnlyString; }

  4. "C# parse numeric values from a string"

    • Description: Explore code examples for parsing numeric values from a string and creating a digit-only string in C#.
    string stringWithNumbers = "123abc456"; string digitOnlyString = ParseNumericValues(stringWithNumbers); 
    public static string ParseNumericValues(string input) { string digitOnlyString = new string(input.Where(char.IsDigit).ToArray()); return digitOnlyString; }

  5. "C# get digits from a mixed code"

    • Description: Learn how to get digits from a mixed code and create a digit-only string in C#.
    string mixedCode = "code123"; string digitsOnlyString = GetDigitsFromMixedCode(mixedCode); 
    public static string GetDigitsFromMixedCode(string input) { string digitsOnlyString = new string(input.Where(char.IsDigit).ToArray()); return digitsOnlyString; }

  6. "C# extract numeric part from a product code"

    • Description: Explore code examples for extracting the numeric part from a product code in C#.
    string productCode = "ABC1234"; string numericPart = ExtractNumericPartFromProductCode(productCode); 
    public static string ExtractNumericPartFromProductCode(string input) { string numericPart = new string(input.Where(char.IsDigit).ToArray()); return numericPart; }

  7. "C# remove non-integer characters from a string"

    • Description: Learn how to remove non-integer characters from a string and create a digit-only string in C#.
    string stringWithNonIntegers = "abc123.45xyz"; string integerOnlyString = RemoveNonIntegerCharacters(stringWithNonIntegers); 
    public static string RemoveNonIntegerCharacters(string input) { string integerOnlyString = new string(input.Where(char.IsDigit).ToArray()); return integerOnlyString; }

  8. "C# strip non-numeric symbols from a phone number"

    • Description: Explore code examples for stripping non-numeric symbols from a phone number in C#.
    string phoneNumber = "+1 (123) 456-7890"; string numericOnlyPhoneNumber = StripNonNumericSymbols(phoneNumber); 
    public static string StripNonNumericSymbols(string input) { string numericOnlyString = new string(input.Where(char.IsDigit).ToArray()); return numericOnlyString; }

  9. "C# filter digits from a currency amount"

    • Description: Learn how to filter digits from a currency amount and create a digit-only string in C#.
    string currencyAmount = "$1,234.56"; string digitsOnlyAmount = FilterDigitsFromCurrency(currencyAmount); 
    public static string FilterDigitsFromCurrency(string input) { string digitsOnlyString = new string(input.Where(char.IsDigit).ToArray()); return digitsOnlyString; }

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