Gets the relative path. : Path « File Stream « C# / C Sharp

1. C# / C Sharp
2. File Stream
3. Path

Gets the relative path.

      
using System;
using System.Collections.Specialized;
using System.Xml;
using System.Text;
using System.Text.RegularExpressions;

namespace RSBuild
{
  /// <summary>
  /// Utility methods.
  /// </summary>
  public static class Util
  {



        /// <summary>
        /// Gets the relative path.
        /// </summary>
        /// <param name="source">The source.</param>
        /// <param name="target">The target.</param>
        /// <returns></returns>
    public static string GetRelativePath(string source, string target)
    {
      string pathSource = Util.FormatPath(source);
      string pathTarget = Util.FormatPath(target);
      string[] sourceSegments = null;
      string[] targetSegments = null;
      int sourceToCommonRoot = 0, targetToCommonRoot = 0;
      if (pathSource != "/")
      {
        sourceSegments = pathSource.Split('/');
        sourceToCommonRoot = sourceSegments.GetUpperBound(0);
      }
      if (pathTarget != "/")
      {
        targetSegments = pathTarget.Split('/');
        targetToCommonRoot = targetSegments.GetUpperBound(0);
      }
      StringBuilder relativePath = new StringBuilder();
      int parentSegments = sourceToCommonRoot;
      int i = 1;

      while(sourceToCommonRoot >= i && targetToCommonRoot >= i)
      {
        if (string.Compare(sourceSegments[i], targetSegments[i], true) == 0)
        {
          parentSegments--;
          i++;
        }
        else
        {
          break;
        }
      }

      for(int k=0; k<parentSegments; k++)
      {
        relativePath.Append("../");
      }

      for(int m=i; m<=targetToCommonRoot; m++)
      {
        relativePath.AppendFormat("{0}/", targetSegments[m]);
      }

      return relativePath.ToString();

    }
  }
}

   
    
    
    
    
    
  

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