[游戏开发]Unity打开本地文件（不使用dll的情况下）

更全的链接：Unity 选择本地目录选择文件打开指定文件夹(无需引入dll)_love and share-CSDN博客https://blog.csdn.net/qq_39342142/article/details/103781728

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

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

public class OpenFile
{
? ? 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] OpenFile of);
? ? public static bool GetOpenFileName1([In, Out] OpenFile of)
? ? {
? ? ? ? return GetOpenFileName(of);
? ? }
? ? /// <summary>
? ? /// 打开文件
? ? /// </summary>
? ? /// <param name="filter">过滤器</param>
? ? /// <param name="m_defaultPath">默认打开的路径</param>
? ? /// <returns></returns>
? ? public static string OpenFile(string filter,string m_defaultPath)
? ? {
? ? ? ? OpenFile of = new OpenFile();
? ? ? ? of.structSize = Marshal.SizeOf(of);
? ? ? ? of.filter = filter;
? ? ? ? of.file = new string(new char[256]);
? ? ? ? of.maxFile = of.file.Length;
? ? ? ? of.fileTitle = new string(new char[64]);
? ? ? ? of.maxFileTitle = of.fileTitle.Length;
? ? ? ? string defaultPath = m_defaultPath;
? ? ? ? defaultPath = defaultPath.Replace('/', '\\');
? ? ? ? of.initialDir = defaultPath;
? ? ? ? of.title = "小宝贝儿，Word很大你忍一下";
? ? ? ? of.defExt = "DOCX";
? ? ? ? of.flags = 0x00080000 | 0x00001000 | 0x00000800 | 0x00000200 | 0x00000008;
? ? ? ? if (WindowDll.GetOpenFileName(of))
? ? ? ? {
? ? ? ? ? ? Debug.Log("Selected file with full path: {0}" + of.file);
? ? ? ? ? ? return of.file;
? ? ? ? }
? ? ? ? return string.Empty;
? ? }
}