How do I convert feet to inches in a string

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I have the following functions which detects and converts inches and feet in a string.

VB

'inches
   Private Shared Function Convert(value As String) As String
       Return Regex.Replace(value, "([\d.]+)'", Function(m) Format(Single.Parse(m.Groups(1).Value) * 0.3048, "Standard"))
   End Function

   'feet
   Private Shared Function ConvertFeet(value As String) As String
       Return Regex.Replace(value, "([\d.]+)''", Function(m) Format(Single.Parse(m.Groups(1).Value) * 0.0254, "Standard"))
   End Function

Please I want to combine these functions into one so than
eg. given 2'5'' I will have 0.74 meters

Posted 27-Oct-14 1:22am

wizy@2020

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Sergey Alexandrovich Kryukov 27-Oct-14 7:25am

If you want to combine it, combine it. What's the problem?
—SA

2 solutions

Solution 3

There is no way to combine those functions into one and have it work reliably.

A better way to do it would be to parse the string into a structure that represents a length. You can then call a overloaded ToString method on that structure that can give you a string in any format you want, English or Metric. You, of course, would have to write that method yourself, dictating what parameters you'll accept.

Posted 27-Oct-14 10:45am

Dave Kreskowiak

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Garth J Lancaster · Accepted Answer · 2014-10-27T02:01:00

oh, I see you wish to supply something like 5'6" (5 feet 6 inches).. well, in c# I'd start with something like

XML

String feetinchRegexString = @"
    (?<feet>[\d.]+) # Feet
    (\')        # ' Feet Marker
    (?<inch>[\d.]+) # Inch
    (\")        # " Inch Marker
";

# NB Have to use RegexOption.IgnorePatternWhiteSpace

I doubt that regex is actually usable, Im just surmising some of the things you'd need to think about - it doesn't take into account things like

5' 3/16"

for example - NB in C# using 'named groups' you would extract 'feet' and 'inches' like this

Regex feetinchesRegex = new Regex(feetinchesRegexString, RegexOption.IgnorePatternWhiteSpace);
Match match = regex.Match(sample);
    if (match.Success)
    {
        Console.WriteLine(match.Groups["Feet"].Value);
    Console.WriteLine(match.Groups["Inches"].Value);
    }

Im pretty sure you'd be able to do the same in VB.Net, and re-do my regex for all conditions - then you simply combine feet and inches into a 'double' perhaps and apply the correct multiplication factor