【轉載】unity打開Windows資源管理器，選取並載入文件

原文地址：

unity打開資源管理器主要通過C#自帶的OpenFileName腳本。

using UnityEngine;
using System.Collections;
using System;
using System.Runtime.InteropServices;

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]

public class OpenFileName
{
    public int structSize = 0;
    public IntPtr dlgOwner = IntPtr.Zero;
    public IntPtr instance = IntPtr.Zero;
    public String filter = null;
    public String customFilter = null;
    public int maxCustFilter = 0;
    public int filterIndex = 0;
    public String file = null;
    public int maxFile = 0;
    public String fileTitle = null;
    public int maxFileTitle = 0;
    public String initialDir = null;
    public String title = null;
    public int flags = 0;
    public short fileOffset = 0;
    public short fileExtension = 0;
    public String defExt = null;
    public IntPtr custData = IntPtr.Zero;
    public IntPtr hook = IntPtr.Zero;
    public String templateName = null;
    public IntPtr reservedPtr = IntPtr.Zero;
    public int reservedInt = 0;
    public int flagsEx = 0;
}

public class WindowDll
{
    [DllImport("Comdlg32.dll", SetLastError = true, ThrowOnUnmappableChar = true, CharSet = CharSet.Auto)]
    public static extern bool GetOpenFileName([In, Out] OpenFileName ofn);
    public static bool GetOpenFileName1([In, Out] OpenFileName ofn)
    {
        return GetOpenFileName(ofn);
    }
}

實現打開資源管理器並選擇文件的腳本。 

using UnityEngine;
using System.Collections;
using System.Runtime.InteropServices;
using System.Reflection;

public class CameraTest : MonoBehaviour
{
    public WebCamTexture cameraTexture;
    public Transform plane;
    public string cameraName = "";
    private bool isPlay = false;
    // Use this for initialization  
    void Start()
    {
        //StartCoroutine(OpenCamera());  
    }

    // Update is called once per frame  
    void Update()
    {

    }
    /// <summary>  
    /// 獲取許可權打開攝像頭  
    /// </summary>  
    /// <returns></returns>  
    IEnumerator OpenCamera()
    {
        yield return Application.RequestUserAuthorization(UserAuthorization.WebCam);
        if (Application.HasUserAuthorization(UserAuthorization.WebCam))
        {
            WebCamDevice[] devices = WebCamTexture.devices;
            cameraName = devices[0].name;
            cameraTexture = new WebCamTexture(cameraName, 320, 240, 15);
            cameraTexture.Play();
            isPlay = true;
        }
    }

    void OnGUI()
    {
        if (isPlay)
        {
            GUI.DrawTexture(new Rect(0, 0, 500, 500), cameraTexture, ScaleMode.ScaleAndCrop);
        }

        if (GUI.Button(new Rect(0, 0, 100, 35), "OpenDialog"))
        {
            OpenFileName ofn = new OpenFileName();

            ofn.structSize = Marshal.SizeOf(ofn);

            //ofn.filter = "All Files\0*.*\0\0";
            ofn.filter = "圖片文件(*.jpg*.png)\0*.jpg;*.png";
            ofn.file = new string(new char[256]);

            ofn.maxFile = ofn.file.Length;

            ofn.fileTitle = new string(new char[64]);

            ofn.maxFileTitle = ofn.fileTitle.Length;
            string path = Application.streamingAssetsPath;
            path = path.Replace('/', '\\');
            //預設路徑  
            ofn.initialDir = path;
            //ofn.initialDir = "D:\\MyProject\\UnityOpenCV\\Assets\\StreamingAssets";  
            ofn.title = "Open Project";

            ofn.defExt = "JPG";//顯示文件的類型  
            //註意 一下項目不一定要全選 但是0x00000008項不要缺少  
            ofn.flags = 0x00080000 | 0x00001000 | 0x00000800 | 0x00000200 | 0x00000008;//OFN_EXPLORER|OFN_FILEMUSTEXIST|OFN_PATHMUSTEXIST| OFN_ALLOWMULTISELECT|OFN_NOCHANGEDIR  

            if (WindowDll.GetOpenFileName(ofn))
            {
                StartCoroutine(WaitLoad(ofn.file));     //載入圖片到panle

                Debug.Log("Selected file with full path: {0}" + ofn.file);
            }

        }
    }

    IEnumerator WaitLoad(string fileName)
    {
        WWW wwwTexture = new WWW("file://" + fileName);

        Debug.Log(wwwTexture.url);

        yield return wwwTexture;

        plane.GetComponent<Renderer>().material.mainTexture = wwwTexture.texture;
    }
}