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C# / .NET - check if string contains any numbers
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In this article, we would like to show you how to check if string contains any numbers in C#.
Quick solution:
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string text1 = "ABC123";2
string text2 = "ABCDEF";3
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string pattern = "\\d"; // regular expression pattern5
// to check if string contains any numbers6
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bool result1 = Regex.IsMatch(text1, regex); // True8
bool result2 = Regex.IsMatch(text2, regex); // Falseor:
xxxxxxxxxx1
string text1 = "ABC123";2
string text2 = "ABCDEF";3
4
bool result1 = text1.Any(Char.IsDigit); // True5
bool result2 = text2.Any(Char.IsDigit); // False
In this example, we use regular expression with specified pattern to check if string contains any numbers (\d stands for digits).
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using System;2
using System.Text.RegularExpressions;3
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public class Program5
{6
public static void Main()7
{8
string text1 = "ABC123";9
string text2 = "ABCDEF";10
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string pattern = "\\d"; // regular expression pattern to check if string contains any numbers12
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bool result1 = Regex.IsMatch(text1, pattern);14
bool result2 = Regex.IsMatch(text2, pattern);15
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Console.WriteLine(result1); // True17
Console.WriteLine(result2); // False18
}19
}Output:
xxxxxxxxxx1
True2
FalseIn this example, we use Any() method from System.Linq namespace combined with Char.IsDigit() to check if string contains numbers.
xxxxxxxxxx1
using System;2
using System.Linq;3
4
public class Program5
{6
public static void Main()7
{8
string text1 = "ABC123";9
string text2 = "ABCDEF";10
11
bool result1 = text1.Any(Char.IsDigit);12
bool result2 = text2.Any(Char.IsDigit);13
14
Console.WriteLine(result1); // True15
Console.WriteLine(result2); // False16
}17
}Output:
xxxxxxxxxx1
True2
False