Help , for fix scripting a filebrowser

Scripting
1

Hi everyone i find a simple file browser code in unity3d forums worked by Nette and i want to fix some problem and add some details to this script.

first : this script don’t have any Drive list ,i search IO.System in MSDN and find a function :

GetDrives() ----> foreach( DriveInfo  d  in DriveInfo.GetDrives())

but it doesn’t work the error is :

NotImplementedException: The requested feature is not implemented.

please somebody help me …

using UnityEngine;
using System.IO;
using System.Collections;

public class CTreeView : MonoBehaviour {
   
   public Rect winRect = new Rect(20,20,120,50);   //windows basic rect
   public string location;
   private Vector2 scrollPosition;
   
   private string[] strs;   //record the special level's selection
   private int index;
   private string path;   //this is the selected file's full name
   
   public GUIStyle fileStyle;                  //if the item is a file use this style
   public GUIStyle dirStyle;                  //if the item is a directory use this style
   
   public string filter;                     //filter of file select
   
   public Texture2D fileTexture;               //the file texture
   public Texture2D dirTexture;               //the directory texture
   
   void Awake()
   {
      location = Application.dataPath;
      strs = new string[20];
      index = 0;
      path = location;
   }
   
   void OnGUI()
   {
      winRect = GUILayout.Window(1, winRect, DoMyWindow, "Browser");
   }
   
   void DoMyWindow(int windowID)
   {
      OpenFileWindow(location);
      GUI.DragWindow ();
   }
   
   void OpenFileWindow( string location )
   {
	   GUILayout.BeginVertical();
	   DriveBrowser(location);
	   GUILayout.EndVertical();
      scrollPosition = GUILayout.BeginScrollView (scrollPosition,GUILayout.Width(400),GUILayout.Height(400));
      GUILayout.BeginVertical();
         FileBrowser( location, 0, 0);   
      GUILayout.EndVertical();
      GUILayout.EndScrollView ();
      GUILayout.Label("Selected:" + path);
   }

   void DriveBrowser(string loc){
	foreach( DriveInfo  d  in DriveInfo.GetDrives())
	   {
		   //Not Yet programming...
	   }
   }
   void FileBrowser( string location, int spaceNum, int index)
   {
      FileInfo fileSelection;
      DirectoryInfo directoryInfo;
      DirectoryInfo directorySelection;
      
      //
      fileSelection = new FileInfo( location );
      if( fileSelection.Attributes == FileAttributes.Directory )
         directoryInfo = new DirectoryInfo( location );
      else
         directoryInfo = fileSelection.Directory;
         
      //
      GUILayout.BeginVertical();
         
         foreach( DirectoryInfo dirInfo in directoryInfo.GetDirectories())
         {
            GUILayout.BeginHorizontal();
            GUILayout.Space(spaceNum);
            GUILayout.Label(dirTexture,dirStyle,GUILayout.Width(12));
            if( GUILayout.Button(dirInfo.Name, dirStyle) )
            {
               strs[index] = dirInfo.FullName;
               path = dirInfo.FullName;   
            }
            GUILayout.EndHorizontal();
            if( dirInfo.FullName == strs[index]  strs[index] != location )
               FileBrowser(strs[index], spaceNum + 20, index+1);            
         }
         
         //list the special file with speical style and texture under current directory
         //if( filter=="") filter = "*.*";
         fileSelection = SelectList(directoryInfo.GetFiles(), null, fileStyle, fileTexture, spaceNum) as FileInfo;
         if( fileSelection != null )
              path = fileSelection.FullName;
            
      GUILayout.EndVertical();   
   }
   
   private object SelectList( ICollection list, object selected, GUIStyle style, Texture image, int spaceNum)
   {
      foreach( object item in list )
      {
         //just show the name of directory and file
         FileSystemInfo info = item as FileSystemInfo;
         GUILayout.BeginHorizontal();
         GUILayout.Space(spaceNum);
         GUILayout.Label(image,style,GUILayout.Width(12));
         if( GUILayout.Button(info.Name, style) )
         {
            selected = item;
         }
         GUILayout.EndHorizontal();
      }
      return selected;
   }
}

``

2

If that method isn’t implemented… there’s one hack of a workaround:

if (System.IO.Directory.Exists(@"C:\"))
{
	//drive exists!
}