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  1. using System.Collections.Generic;
  2. using System.Linq;
  3. using System.Text;
  4. using System.Net;
  5. using System;
  6.  
  7. public class Test
  8. {
  9. 	public static void Main()
  10. 	{
  11. 		var originalString = "My name @is ,Wan.;'; Wan";
  12. 		Console.WriteLine("Original string:");
  13. 		Console.WriteLine(originalString);
  14. 		Console.WriteLine();
  15.  
  16. 		var sanitizedString = RemoveExcept(originalString, alphas: true, spaces: true);
  17. 		Console.WriteLine("Sanitized string:");
  18. 		Console.WriteLine(sanitizedString);
  19. 		Console.WriteLine();
  20. 	}
  21.  
  22. 	/// <summary>
  23. 	/// Returns a copy of the original string containing only the set of whitelisted characters.
  24. 	/// </summary>
  25. 	/// <param name="value">The string that will be copied and scrubbed.</param>
  26. 	/// <param name="alphas">If true, all alphabetical characters (a-zA-Z) will be preserved; otherwise, they will be removed.</param>
  27. 	/// <param name="numerics">If true, all alphabetical characters (a-zA-Z) will be preserved; otherwise, they will be removed.</param>
  28. 	/// <param name="dashes">If true, all alphabetical characters (a-zA-Z) will be preserved; otherwise, they will be removed.</param>
  29. 	/// <param name="underlines">If true, all alphabetical characters (a-zA-Z) will be preserved; otherwise, they will be removed.</param>
  30. 	/// <param name="spaces">If true, all alphabetical characters (a-zA-Z) will be preserved; otherwise, they will be removed.</param>
  31. 	/// <param name="periods">If true, all decimal characters (".") will be preserved; otherwise, they will be removed.</param>
  32. 	public static string RemoveExcept(string value, bool alphas = false, bool numerics = false, bool dashes = false, bool underlines = false, bool spaces = false, bool periods = false) {
  33. 		if (string.IsNullOrWhiteSpace(value)) return value;
  34. 		if (new[] { alphas, numerics, dashes, underlines, spaces, periods }.All(x => x == false)) return value;
  35.  
  36. 		var whitelistChars = new HashSet<char>(string.Concat(
  37. 			alphas ? "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ" : "",
  38. 			numerics ? "01234567890" : "",
  39. 			dashes ? "-" : "",
  40. 			underlines ? "_" : "",
  41. 			periods ? "." : "",
  42. 			spaces ? " " : ""
  43. 		).ToCharArray());
  44.  
  45. 		var scrubbedValue = value.Aggregate(new StringBuilder(), (sb, @char) => {
  46. 			if (whitelistChars.Contains(@char)) sb.Append(@char);
  47. 			return sb;
  48. 		}).ToString();
  49.  
  50. 		return scrubbedValue;
  51. 	}
  52. }
Success #stdin #stdout 0s 131520KB
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stdin
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Standard input is empty
stdout
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Original string:
My name @is ,Wan.;'; Wan

Sanitized string:
My name is Wan Wan
https://ideone.com/tdYvit
language:
C# (gmcs 5.20.1)
created:
4 years ago
visibility:
secret

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