Unity 中打开文件窗口

最新推荐文章于 2024-01-04 17:51:20 发布

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本文介绍了一个使用C#实现的文件选择和文件夹选择对话框的方法。通过自定义结构体和调用Windows API函数，可以实现获取用户选定的文件路径或文件夹路径的功能。

using System.Runtime.InteropServices;
using System;

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
public class FileDialogStruct
{
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 static class OpenFileDialog
{

/// <summary>
/// 读取该选取文件的路径  filter 表示过滤哪一种文件 （）里面是文本显示作用  后面的用于筛选的
/// </summary>
public static string OpenFileDialogWin32(string filter = "(*,*)\0*.*\0", string initDir = "", string defEx = "*.*", string winName = null, string Title = "Open File Dialog")
{
    FileDialogStruct dialog = new FileDialogStruct();
    dialog.structSize = Marshal.SizeOf(dialog);
    if (!string.IsNullOrEmpty(winName)) { dialog.dlgOwner = FindWindow(null, winName); }
    dialog.filter = filter;
    dialog.file = new string(new char[256]);
    dialog.maxFile = dialog.file.Length;
    //dialog.fileTitle = new string(new char[64]);
    //dialog.maxFileTitle = dialog.fileTitle.Length;
    dialog.initialDir = initDir;  //默认路径
    dialog.defExt = defEx;//显示文件的类型
    dialog.title = Title;
    dialog.flags = 0x00000008;  //OFN_EXPLORER|OFN_FILEMUSTEXIST|OFN_PATHMUSTEXIST| OFN_ALLOWMULTISELECT|OFN_NOCHANGEDIR

    if (GetOpenFileName(dialog))
    {
        dialog.dlgOwner = IntPtr.Zero;
        return dialog.file;
    }
    else
    {
        return string.Empty;
    }
}

这里就是 string filter = “(,)\0*.*\0” 前面括号填的内容仅仅用于显示后面的就是用于筛选哪些文件类型

在这里插入图片描述

/// <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 = "选择目录")
{
    OpenDialogDir ofn2 = new OpenDialogDir();
    ofn2.pszDisplayName = new string(new char[512]);
    //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 = SHBrowseForFolder(ofn2);
    char[] charArray = new char[256];
    for (int i = 0; i < charArray.Length; i++)
    {
        charArray[i] = '\0';
    }
    if (!SHGetPathFromIDList(pidlPtr, charArray)) { return string.Empty; }
    string res = new string(charArray);
    res = res.Substring(0, res.IndexOf('\0'));
    return res;
}

上面的方法打开的是以下的文件窗口
在这里插入图片描述

[DllImport("Comdlg32.dll", SetLastError = true, ThrowOnUnmappableChar = true, CharSet = CharSet.Auto)]
public static extern bool GetOpenFileName([In, Out] FileDialogStruct dialog);

[DllImport("shell32.dll", SetLastError = true, ThrowOnUnmappableChar = true, CharSet = CharSet.Auto)]
private static extern IntPtr SHBrowseForFolder([In, Out] OpenDialogDir ofn);

[DllImport("shell32.dll", SetLastError = true, ThrowOnUnmappableChar = true, CharSet = CharSet.Auto)]
private static extern bool SHGetPathFromIDList([In] IntPtr pidl, [In, Out] char[] fileName);

[DllImport("user32.dll", EntryPoint = "FindWindow", SetLastError = true)]
public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);

}