String - ExtractInt64
A string extension method that extracts the Int64 from the string.
public static void Main() { string [] input = {"No. 9235125391235", "abc-153846685654"}; foreach(var val in input) { //C# Extension Method: String - ExtractInt64 var output = val.ExtractInt64(); Console.WriteLine(output); } }
View Source
using System; using System.Text; public static partial class Extensions { /// <summary> /// A string extension method that extracts the Int64 from the string. /// </summary> /// <param name="this">The @this to act on.</param> /// <returns>The extracted Int64.</returns> public static long ExtractInt64(this string @this) { var sb = new StringBuilder(); for (int i = 0; i < @this.Length; i++) { if (Char.IsDigit(@this[i])) { if (sb.Length == 0 && i > 0 && @this[i - 1] == '-') { sb.Append('-'); } sb.Append(@this[i]); } } return Convert.ToInt64(sb.ToString()); } }