🎉 增加了相对路径

Util/FileUtil.cs

@@ -1,5 +1,6 @@
 using IWshRuntimeLibrary;
 using System;
+using System.IO;
 using System.Runtime.InteropServices;
 using System.Text;
 using System.Text.RegularExpressions;
@@ -156,5 +157,26 @@ namespace GeekDesk.Util
             }
         }
 
+        public static String MakeRelativePath(String fromPath, String toPath)
+        {
+            if (String.IsNullOrEmpty(fromPath)) throw new ArgumentNullException("fromPath");
+            if (String.IsNullOrEmpty(toPath)) throw new ArgumentNullException("toPath");
+
+            Uri fromUri = new Uri(fromPath);
+            Uri toUri = new Uri(toPath);
+
+            if (fromUri.Scheme != toUri.Scheme) { return toPath; } // path can't be made relative.
+
+            Uri relativeUri = fromUri.MakeRelativeUri(toUri);
+            String relativePath = Uri.UnescapeDataString(relativeUri.ToString());
+
+            if (toUri.Scheme.Equals("file", StringComparison.InvariantCultureIgnoreCase))
+            {
+                relativePath = relativePath.Replace(Path.AltDirectorySeparatorChar, Path.DirectorySeparatorChar);
+            }
+
+            return relativePath;
+        }
+
     }
 }