Use Regex in C# to insert spaces between ConcatenatedFileNamesLikeThis?

Question

We\'re trying to generate user friendly looking report names from SSRS Report filenames, these can\'t have spaces in the name but it should be possible to generate them from

Answer 1

Edit 2 fixed IEE

var input = @"WeeklyIEEReportWC20090103SortedByDate";
string p = @"(?<=[A-Z])(?=[A-Z][a-z])|(?<=[a-z0-9])(?=[A-Z])|(?<=[a-zA-Z])(?=[0-9])";
string value = Regex.Replace(input, p, " ");

produces Members Of IEE Team and Weekly IEE Report WC 20090103 Sorted By Date for the samples provided.

Answer 2

My interpretation and solution:

var input = "WeeklyIEEReportWC20090103SortedByDateXFoo3W3CBar4x";
var re = @"(?!^)(?:[A-Z](?:[a-z]+|(?:[A-Z\d](?![a-z]))*)|\d+)";
string value = Regex.Replace(input, re, " $0");

Result: Weekly IEE Report WC20090103 Sorted By Date X Foo 3 W3C Bar 4x