Unity调用Windows窗口句柄，选择文件和目录

T：2019-6-25 10:06:59

C：Scatt Kang

using System;

using System.Collections;

using System.Collections.Generic;

using System.Runtime.InteropServices;

using UnityEngine;

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

public class OpenDialogFile
{
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 OpenDialogDir
{
public IntPtr hwndOwner = IntPtr.Zero;
public IntPtr pidlRoot = IntPtr.Zero;
public String pszDisplayName = null;
public String lpszTitle = null;
public UInt32 ulFlags = 0;
public IntPtr lpfn = IntPtr.Zero;
public IntPtr lParam = IntPtr.Zero;
public int iImage = 0;
}

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;
}

}