【新提醒】【Unity选择本地文件夹和文件】

using System;

using System.Runtime.InteropServices;

public class WindowsExplorer

{

    [DllImport("Comdlg32.dll", SetLastError = true, ThrowOnUnmappableChar = true, CharSet = CharSet.Auto)]

    public static extern bool GetOpenFileName([In, Out] OpenDialogFile ofn);

    [DllImport("Comdlg32.dll", SetLastError = true, ThrowOnUnmappableChar = true, CharSet = CharSet.Auto)]

    public static extern bool GetSaveFileName([In, Out] OpenDialogFile ofn);

    [DllImport("shell32.dll", SetLastError = true, ThrowOnUnmappableChar = true, CharSet = CharSet.Auto)]

    public static extern IntPtr SHBrowseForFolder([In, Out] OpenDialogDir ofn);

    [DllImport("shell32.dll", SetLastError = true, ThrowOnUnmappableChar = true, CharSet = CharSet.Auto)]

    public static extern bool SHGetPathFromIDList([In] IntPtr pidl, [In, Out] char[] fileName);

    /// <summary>

    /// 调用WindowsExploer 并返回所选文件夹路径

    /// </summary>

    /// <param name="dialogtitle">打开对话框的标题</param>

    /// <returns>所选文件夹路径</returns>

    public static string GetPathFromWindowsExplorer(string dialogtitle = "请选择下载路径")

    {

        string res;

        OpenDialogDir ofn2 = new OpenDialogDir();

        ofn2.pszDisplayName = new string(new char[2000]); ;     // 存放目录路径缓冲区 

        ofn2.lpszTitle = dialogtitle;// 标题 

        ofn2.ulFlags = 0x00000040; // 新的样式,带编辑框 

        IntPtr pidlPtr = WindowsExplorer.SHBrowseForFolder(ofn2);

        char[] charArray = new char[2000];

        for (int i = 0; i < 2000; i++)

            charArray[i] = '\0';

        WindowsExplorer.SHGetPathFromIDList(pidlPtr, charArray);

        res = new String(charArray);

        res = res.Substring(0, res.IndexOf('\0'));

        return res;

    }

}