FileBro.cs

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using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using UnityEngine.UI;
using System.IO;
using System;

public class FileBro : MonoBehaviour
{

    public string fileToOpen;
    public Button fileButton;
    public Button foldButton;
    public GameObject fileBro;
    public GameObject folderBro;
    private string currentPath;
    private float lastClicked = 0.0f;
    private string lastPath = null;

    void Awake ()
    {
        // Setting the curent path to the absolute path of current project
        currentPath = Application.dataPath + "/../samples/";
    }
    // Use this for initialization
    void Start ()
    {
        // Create the initial folder content
        UpdateBro (currentPath);
    }

    void UpdateBro (string pathToGo)
    {
        // Change the current path to the path of clik on folder  
        currentPath = pathToGo;
        Debug.Log (currentPath);

        DirectoryInfo dir = new DirectoryInfo (pathToGo);
        FileInfo[] info = dir.GetFiles ("*.*");
        DirectoryInfo[] infod = dir.GetDirectories ("*");
    
        // Destroy buttons generated by last call
        foreach (Transform child in fileBro.transform) {
            GameObject.Destroy (child.gameObject);
        }


        // Generate "folder" buttons
        foreach (DirectoryInfo f in infod) { 
            Button fbButton = Instantiate (foldButton) as Button;
            //Set name 
            fbButton.GetComponentInChildren<Text> ().text = f.Name;
            //Assign to parent
            fbButton.transform.SetParent (fileBro.transform, false);
            //Capturing the value instead of the loop iterator (fixed in 5 but not 4.6)
            string captured = f.FullName;
            //Adding the listener
            fbButton.onClick.AddListener (() => (UpdateBro (captured)));
        }
        
    

        //Generate "file" buttons 
        foreach (FileInfo f in info) { 
            Button fbButton = Instantiate (fileButton) as Button;
            //Set name 
            fbButton.GetComponentInChildren<Text> ().text = f.Name;
            //Assign to parent
            fbButton.transform.SetParent (fileBro.transform, false);
            //Capturing the value instead of the loop iterator (fixed in 5 but not 4.6)
            string captured = f.FullName;
            //Adding the listener
            fbButton.onClick.AddListener (() => (SetFileToOpen (captured)));
        }

        foreach (Transform child in folderBro.transform) {
            GameObject.Destroy (child.gameObject);
        }
        UpdateParentsFolderPanel ();
    }

    void UpdateParentsFolderPanel ()
    {
        DirectoryInfo dir = new DirectoryInfo (currentPath);
        List<DirectoryInfo> directories = dir.Split ();
        foreach (DirectoryInfo dirf in directories) {
            Button fbButton = Instantiate (foldButton) as Button;
            //Set name 
            fbButton.GetComponentInChildren<Text> ().text = dirf.Name;
            //Assign to parent
            fbButton.transform.SetParent (folderBro.transform, false);
            //Capturing the value instead of the loop iterator
            string captured = dirf.FullName;
            //Adding the listener
            fbButton.onClick.AddListener (() => (UpdateBro (captured)));

        }
    }

    void SetFileToOpen (string fileSelected)
    {
        fileToOpen = fileSelected;
        if(lastPath != null && lastPath == fileSelected && Time.time - lastClicked < 0.5f){
            //TODO Change this ugly call
            GameObject.Find("UIManager").GetComponent<LoadGUI>().OpenFileCallback();
        }
        lastClicked = Time.time;
        lastPath = fileSelected;
    }

    public void GoToParent ()
    {
        Debug.Log (currentPath);
        UpdateBro (Directory.GetParent (currentPath).FullName);
    }
    

}