Unity 在Windows平台下 调用OpenFileDialog和SaveFileDialog 让用户指定文件路径

转自： https://www.freesion.com/article/62131336949/
自己留着防止找不到

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




public class 文件管理 : MonoBehaviour
{
    
    



    public void 打开()
    {
    
    
        OpenFileDlg ofd = new OpenFileDlg();
        ofd.structSize = Marshal.SizeOf(ofd);
        ofd.filter = "txt files\0*.txt\0All Files\0*.*\0\0";
        ofd.file = new string(new char[256]);
        ofd.maxFile = ofd.file.Length;
        ofd.fileTitle = new string(new char[64]);
        ofd.maxFileTitle = ofd.fileTitle.Length;
        ofd.initialDir = Application.dataPath; //默认路径
        ofd.title = "打开文件";
        ofd.defExt = "txt";
        ofd.flags = 0x00080000 | 0x00001000 | 0x00000800 | 0x00000200 | 0x00000008;
        if (OpenFileDialog.GetOpenFileName(ofd))
        {
    
    
            string filepath = ofd.file; //选择的文件路径;  
            print("打开 " + filepath);
        }
    }

    public void 保存()
    {
    
    
        SaveFileDlg sfd = new SaveFileDlg();
        sfd.structSize = Marshal.SizeOf(sfd);
        sfd.filter = "txt files\0*.txt\0All Files\0*.*\0\0";
        sfd.file = new string(new char[256]);
        sfd.maxFile = sfd.file.Length;
        sfd.fileTitle = new string(new char[64]);
        sfd.maxFileTitle = sfd.fileTitle.Length;
        sfd.initialDir = Application.dataPath; //默认路径
        sfd.title = "保存文件";
        sfd.defExt = "txt";
        sfd.flags = 0x00080000 | 0x00001000 | 0x00000800 | 0x00000200 | 0x00000008;
        if (SaveFileDialog.GetSaveFileName(sfd))
        {
    
    
            string filepath = sfd.file; //选择的文件路径;
            print("保存 " + filepath);
        }
    }
}

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
public class FileDlog
{
    
    
    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;
}

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
public class OpenFileDlg : FileDlog
{
    
    
}

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

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
public class SaveFileDlg : FileDlog
{
    
    
}

public class SaveFileDialog
{
    
    
    [DllImport("Comdlg32.dll", SetLastError = true, ThrowOnUnmappableChar = true, CharSet = CharSet.Auto)]
    public static extern bool GetSaveFileName([In, Out] SaveFileDlg ofn);
}

效果

打开：

保存：