Resolving relative paths with wildcards in C#
You can get the absolute path first and then enumerate the files inside the directory matching the wildcard:
// input
string rootDir = @"c:\foo\bar";
string originalPattern = @"..\blah\*.cpp";
// Get directory and file parts of complete relative pattern
string pattern = Path.GetFileName (originalPattern);
string relDir = originalPattern.Substring ( 0, originalPattern.Length - pattern.Length );
// Get absolute path (root+relative)
string absPath = Path.GetFullPath ( Path.Combine ( rootDir ,relDir ) );
// Search files mathing the pattern
string[] files = Directory.GetFiles ( absPath, pattern, SearchOption.TopDirectoryOnly );
It's simple.
using System.IO;
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string[] files = Directory.GetFiles(@"c:\", "*.txt", SearchOption.TopDirectoryOnly);