如何使用OpenFileDialog选择文件夹?

我将使用以下项目:https://github.com/scottwis/OpenFileOrFolderDialog

然而，有一个问题:它使用GetOpenFileName函数和OPENFILENAME结构。OPENFILENAME有一个名为templateID的成员，它是对话框模板的标识符。该项目也包含res1.rc文件和模板化的对话框init。但是我不知道如何将这个文件附加到我的c#项目。

是否有更好的方法使用OpenFileDialog来选择文件夹?

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小开

听起来像你只是在FolderBrowserDialog。

小开
最佳答案

基本上你需要FolderBrowserDialog类:

提示用户选择一个文件夹。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");
}
}

如果你在WPF中工作，你必须添加对System.Windows.Forms的引用。

你还必须为Directory类添加using System.IO

小开

奇怪的是，这么多的答案/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
}
}
小开

对于那些希望避免使用FolderBrowserDialog的未来用户，微软曾经发布了一个名为WindowsAPICodePack的API，它有一个名为CommonOpenFileDialog的有用对话框，可以设置为IsFolderPicker模式。该API可从微软以NuGet包的形式获得。

这就是安装和使用CommonOpenFileDialog所需的全部内容。(NuGet处理依赖)

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);
}
小开

有一个使用OpenFileDialog的解决方案，其中ValidateNames和CheckFileExists都被设置为false，并且FileName被赋予一个模拟值来指示一个目录被选中。

我说黑客，因为它是困惑的用户如何选择一个文件夹。它们需要在所需的文件夹中，然后只需按下打开，而文件名显示“文件夹选择”。

c#文件夹选择对话框

这是基于Denis Stankovski的从同一个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);
// ...
}
小开

下面是另一种解决方案，它将所有源代码放在一个简单的ZIP文件中。

它为OpenFileDialog提供了额外的窗口标志，使其像windows 7+文件夹选择对话框一样工作。

根据该网站的说法，它是公共领域的:“没有许可证可以让你自由地使用代码，做你想做的事情。”

Archive.org的链接:

小开

看一下Ookii对话框库，它分别为Windows窗体和WPF实现了文件夹浏览器对话框。

enter image description here

Ookii.Dialogs.WinForms

https://github.com/augustoproiete/ookii-dialogs-winforms

Ookii.Dialogs.Wpf

https://github.com/augustoproiete/ookii-dialogs-wpf

小开

这应该是最明显和直接的方法

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;
}


}
小开

这是一个纯c#版本，无nuget，它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(及更高版本)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，WPF标记的行可以被删除。

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:

enter image description here

小开

西蒙Mourier给出的答案将是考虑到OP问题的最佳答案。它不涉及NuGET包，所以将来选择文件夹方法不会有任何依赖问题。

如果您遇到与“__abc1”相关的错误，只需将<LangVersion>8.0</LangVersion>添加到您的.csproj(使用Visual Studio测试在构建和运行时不会产生任何错误)

如果你不能改变项目语言，那么就替换所有者 ??= Application.Current.MainWindow < / p >

所有者=所有者??Application.Current.MainWindow

小开

我是c#的新手，刚刚看到这个帖子。

对于那些刚接触这门语言的人来说，这可能也会感兴趣。

更改FolderBrowserDialog的设计


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