String - ExtractDouble
A string extension method that extracts the Double from the string.
public static void Main() { string input = "Version 3.9"; //C# Extension Method: String - ExtractDouble var output = input.ExtractDouble(); Console.WriteLine(output); }
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using System; using System.Text; public static partial class Extensions { /// <summary> /// A string extension method that extracts the Double from the string. /// </summary> /// <param name="this">The @this to act on.</param> /// <returns>The extracted Double.</returns> public static double ExtractDouble(this string @this) { var sb = new StringBuilder(); for (int i = 0; i < @this.Length; i++) { if (Char.IsDigit(@this[i]) || @this[i] == '.') { if (sb.Length == 0 && i > 0 && @this[i - 1] == '-') { sb.Append('-'); } sb.Append(@this[i]); } } return Convert.ToDouble(sb.ToString()); } }