如何使用OpenFileDialog选择文件夹？
我打算使用以下项目：https ://github.com/scottwis/OpenFileOrFolderDialog
然而，我遇到了一个问题。它使用的GetOpenFileName功能和OPENFILENAME结构。并OPENFILENAME拥有名为 的成员templateID。它是对话框模板的标识符。该项目也包含res1.rc文件和模板化对话框初始化。但我不知道如何将此文件附加到我的 C# 项目中。
有没有更好的方法来使用OpenFileDialog选择文件夹？
基本上你需要这个FolderBrowserDialog类：
提示用户选择文件夹。这个类不能被继承。
例子：
using(var fbd = new FolderBrowserDialog())
{
DialogResult result = fbd.ShowDialog();
if (result == DialogResult.OK && !string.IsNullOrWhiteSpace(fbd.SelectedPath))
{
string[] files = Directory.GetFiles(fbd.SelectedPath);
System.Windows.Forms.MessageBox.Show("Files found: " + files.Length.ToString(), "Message");
}
}
如果您在WPF中工作，则必须添加对System.Windows.Forms.
您还必须using System.IO为Directory课程添加
作为对希望避免使用的未来用户的说明FolderBrowserDialog，Microsoft 曾经发布了一个名为 WindowsAPICodePack 的 API，其中有一个名为 的有用对话框CommonOpenFileDialog，可以将其设置为IsFolderPicker模式。该 API 可作为NuGet 包从 Microsoft 获得。
这就是我安装和使用CommonOpenFileDialog. （NuGet 处理依赖项）
Install-Package Microsoft.WindowsAPICodePack-Shell
对于包含行：
using Microsoft.WindowsAPICodePack.Dialogs;
用法：
CommonOpenFileDialog dialog = new CommonOpenFileDialog();
dialog.InitialDirectory = "C:\\Users";
dialog.IsFolderPicker = true;
if (dialog.ShowDialog() == CommonFileDialogResult.Ok)
{
MessageBox.Show("You selected: " + dialog.FileName);
}
有一个骇人听闻的解决方案，使用OpenFileDialogwhereValidateNames和CheckFileExists两者都设置为 false 并FileName给出一个模拟值以指示选择了一个目录。
我说 hack 是因为它让用户对如何选择文件夹感到困惑。它们需要位于所需的文件夹中，然后在文件名显示“文件夹选择”时按打开。
这基于Denis Stankovski从同一对话框中选择文件或文件夹。
OpenFileDialog folderBrowser = new OpenFileDialog();
// Set validate names and check file exists to false otherwise windows will
// not let you select "Folder Selection."
folderBrowser.ValidateNames = false;
folderBrowser.CheckFileExists = false;
folderBrowser.CheckPathExists = true;
// Always default to Folder Selection.
folderBrowser.FileName = "Folder Selection.";
if (folderBrowser.ShowDialog() == DialogResult.OK)
{
string folderPath = Path.GetDirectoryName(folderBrowser.FileName);
// ...
}
这是一个纯 C# 版本，无 nuget，应该适用于所有版本的 .NET（包括 .NET Core、.NET 5、WPF、Winforms 等），并使用 Windows Vista（和更高版本）的IFileDialog接口和FOS_PICKFOLDERS选项，因此它具有漂亮的文件夹选择器 Windows 标准 UI。
我还添加了 WPF 的Window类型支持，但这是可选的，可以删除 WPF 标记的行。
用法：
var dlg = new FolderPicker();
dlg.InputPath = @"c:\windows\system32";
if (dlg.ShowDialog() == true)
{
MessageBox.Show(dlg.ResultPath);
}
代码：
using System;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Runtime.InteropServices.ComTypes;
using System.Windows; // for WPF support
using System.Windows.Interop; // for WPF support
public class FolderPicker
{
public virtual string ResultPath { get; protected set; }
public virtual string ResultName { get; protected set; }
public virtual string InputPath { get; set; }
public virtual bool ForceFileSystem { get; set; }
public virtual string Title { get; set; }
public virtual string OkButtonLabel { get; set; }
public virtual string FileNameLabel { get; set; }
protected virtual int SetOptions(int options)
{
if (ForceFileSystem)
{
options |= (int)FOS.FOS_FORCEFILESYSTEM;
}
return options;
}
// for WPF support
public bool? ShowDialog(Window owner = null, bool throwOnError = false)
{
owner ??= Application.Current.MainWindow;
return ShowDialog(owner != null ? new WindowInteropHelper(owner).Handle : IntPtr.Zero, throwOnError);
}
// for all .NET
public virtual bool? ShowDialog(IntPtr owner, bool throwOnError = false)
{
var dialog = (IFileOpenDialog)new FileOpenDialog();
if (!string.IsNullOrEmpty(InputPath))
{
if (CheckHr(SHCreateItemFromParsingName(InputPath, null, typeof(IShellItem).GUID, out var item), throwOnError) != 0)
return null;
dialog.SetFolder(item);
}
var options = FOS.FOS_PICKFOLDERS;
options = (FOS)SetOptions((int)options);
dialog.SetOptions(options);
if (Title != null)
{
dialog.SetTitle(Title);
}
if (OkButtonLabel != null)
{
dialog.SetOkButtonLabel(OkButtonLabel);
}
if (FileNameLabel != null)
{
dialog.SetFileName(FileNameLabel);
}
if (owner == IntPtr.Zero)
{
owner = Process.GetCurrentProcess().MainWindowHandle;
if (owner == IntPtr.Zero)
{
owner = GetDesktopWindow();
}
}
var hr = dialog.Show(owner);
if (hr == ERROR_CANCELLED)
return null;
if (CheckHr(hr, throwOnError) != 0)
return null;
if (CheckHr(dialog.GetResult(out var result), throwOnError) != 0)
return null;
if (CheckHr(result.GetDisplayName(SIGDN.SIGDN_DESKTOPABSOLUTEPARSING, out var path), throwOnError) != 0)
return null;
ResultPath = path;
if (CheckHr(result.GetDisplayName(SIGDN.SIGDN_DESKTOPABSOLUTEEDITING, out path), false) == 0)
{
ResultName = path;
}
return true;
}
private static int CheckHr(int hr, bool throwOnError)
{
if (hr != 0)
{
if (throwOnError)
Marshal.ThrowExceptionForHR(hr);
}
return hr;
}
[DllImport("shell32")]
private static extern int SHCreateItemFromParsingName([MarshalAs(UnmanagedType.LPWStr)] string pszPath, IBindCtx pbc, [MarshalAs(UnmanagedType.LPStruct)] Guid riid, out IShellItem ppv);
[DllImport("user32")]
private static extern IntPtr GetDesktopWindow();
#pragma warning disable IDE1006 // Naming Styles
private const int ERROR_CANCELLED = unchecked((int)0x800704C7);
#pragma warning restore IDE1006 // Naming Styles
[ComImport, Guid("DC1C5A9C-E88A-4dde-A5A1-60F82A20AEF7")] // CLSID_FileOpenDialog
private class FileOpenDialog
{
}
[ComImport, Guid("42f85136-db7e-439c-85f1-e4075d135fc8"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
private interface IFileOpenDialog
{
[PreserveSig] int Show(IntPtr parent); // IModalWindow
[PreserveSig] int SetFileTypes(); // not fully defined
[PreserveSig] int SetFileTypeIndex(int iFileType);
[PreserveSig] int GetFileTypeIndex(out int piFileType);
[PreserveSig] int Advise(); // not fully defined
[PreserveSig] int Unadvise();
[PreserveSig] int SetOptions(FOS fos);
[PreserveSig] int GetOptions(out FOS pfos);
[PreserveSig] int SetDefaultFolder(IShellItem psi);
[PreserveSig] int SetFolder(IShellItem psi);
[PreserveSig] int GetFolder(out IShellItem ppsi);
[PreserveSig] int GetCurrentSelection(out IShellItem ppsi);
[PreserveSig] int SetFileName([MarshalAs(UnmanagedType.LPWStr)] string pszName);
[PreserveSig] int GetFileName([MarshalAs(UnmanagedType.LPWStr)] out string pszName);
[PreserveSig] int SetTitle([MarshalAs(UnmanagedType.LPWStr)] string pszTitle);
[PreserveSig] int SetOkButtonLabel([MarshalAs(UnmanagedType.LPWStr)] string pszText);
[PreserveSig] int SetFileNameLabel([MarshalAs(UnmanagedType.LPWStr)] string pszLabel);
[PreserveSig] int GetResult(out IShellItem ppsi);
[PreserveSig] int AddPlace(IShellItem psi, int alignment);
[PreserveSig] int SetDefaultExtension([MarshalAs(UnmanagedType.LPWStr)] string pszDefaultExtension);
[PreserveSig] int Close(int hr);
[PreserveSig] int SetClientGuid(); // not fully defined
[PreserveSig] int ClearClientData();
[PreserveSig] int SetFilter([MarshalAs(UnmanagedType.IUnknown)] object pFilter);
[PreserveSig] int GetResults([MarshalAs(UnmanagedType.IUnknown)] out object ppenum);
[PreserveSig] int GetSelectedItems([MarshalAs(UnmanagedType.IUnknown)] out object ppsai);
}
[ComImport, Guid("43826D1E-E718-42EE-BC55-A1E261C37BFE"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
private interface IShellItem
{
[PreserveSig] int BindToHandler(); // not fully defined
[PreserveSig] int GetParent(); // not fully defined
[PreserveSig] int GetDisplayName(SIGDN sigdnName, [MarshalAs(UnmanagedType.LPWStr)] out string ppszName);
[PreserveSig] int GetAttributes(); // not fully defined
[PreserveSig] int Compare(); // not fully defined
}
#pragma warning disable CA1712 // Do not prefix enum values with type name
private enum SIGDN : uint
{
SIGDN_DESKTOPABSOLUTEEDITING = 0x8004c000,
SIGDN_DESKTOPABSOLUTEPARSING = 0x80028000,
SIGDN_FILESYSPATH = 0x80058000,
SIGDN_NORMALDISPLAY = 0,
SIGDN_PARENTRELATIVE = 0x80080001,
SIGDN_PARENTRELATIVEEDITING = 0x80031001,
SIGDN_PARENTRELATIVEFORADDRESSBAR = 0x8007c001,
SIGDN_PARENTRELATIVEPARSING = 0x80018001,
SIGDN_URL = 0x80068000
}
[Flags]
private enum FOS
{
FOS_OVERWRITEPROMPT = 0x2,
FOS_STRICTFILETYPES = 0x4,
FOS_NOCHANGEDIR = 0x8,
FOS_PICKFOLDERS = 0x20,
FOS_FORCEFILESYSTEM = 0x40,
FOS_ALLNONSTORAGEITEMS = 0x80,
FOS_NOVALIDATE = 0x100,
FOS_ALLOWMULTISELECT = 0x200,
FOS_PATHMUSTEXIST = 0x800,
FOS_FILEMUSTEXIST = 0x1000,
FOS_CREATEPROMPT = 0x2000,
FOS_SHAREAWARE = 0x4000,
FOS_NOREADONLYRETURN = 0x8000,
FOS_NOTESTFILECREATE = 0x10000,
FOS_HIDEMRUPLACES = 0x20000,
FOS_HIDEPINNEDPLACES = 0x40000,
FOS_NODEREFERENCELINKS = 0x100000,
FOS_OKBUTTONNEEDSINTERACTION = 0x200000,
FOS_DONTADDTORECENT = 0x2000000,
FOS_FORCESHOWHIDDEN = 0x10000000,
FOS_DEFAULTNOMINIMODE = 0x20000000,
FOS_FORCEPREVIEWPANEON = 0x40000000,
FOS_SUPPORTSTREAMABLEITEMS = unchecked((int)0x80000000)
}
#pragma warning restore CA1712 // Do not prefix enum values with type name
}
结果：
奇怪的是这么多答案/投票，但没有人添加以下代码作为答案：
using (var opnDlg = new OpenFileDialog()) //ANY dialog
{
//opnDlg.Filter = "Png Files (*.png)|*.png";
//opnDlg.Filter = "Excel Files (*.xls, *.xlsx)|*.xls;*.xlsx|CSV Files (*.csv)|*.csv"
if (opnDlg.ShowDialog() == DialogResult.OK)
{
//opnDlg.SelectedPath -- your result
}
}
对我来说听起来就像你刚刚在FolderBrowserDialog之后。
这是另一个解决方案，它在一个简单的 ZIP 文件中提供了所有源。
它为 OpenFileDialog 提供了额外的 Windows 标志，使其像 Windows 7+ 文件夹选择对话框一样工作。
根据该网站，它是公共领域：“没有许可证，您可以随意获取和使用代码。”
Archive.org 链接：
这应该是最明显和最直接的方式
using (var dialog = new System.Windows.Forms.FolderBrowserDialog())
{
System.Windows.Forms.DialogResult result = dialog.ShowDialog();
if(result == System.Windows.Forms.DialogResult.OK)
{
selectedFolder = dialog.SelectedPath;
}
}