C#选择文件夹对话框、与打开文件夹类似对话框能选择目录

发布：2023/12/7 15:46:00作者：大数据来源：大数据浏览次数：704

选择目录或选择文件夹对话框，先上图，类似vs打开文件夹的对话框

一、第一实现，使用插件：

nuget安装WindowsAPICodePack插件：

WindowsAPICodePack-Shell 版本：1.1.1

或者

WindowsAPICodePack 版本：1.1.2

实现代码如下：

var commonOpenFileDialog = new CommonOpenFileDialog();

commonOpenFileDialog.IsFolderPicker = true; //设置为true为选择文件夹，设置为false为选择文件

commonOpenFileDialog.Title = "选择文件夹";

commonOpenFileDialog.InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.ProgramFiles);

var result = commonOpenFileDialog.ShowDialog();

if (result == CommonFileDialogResult.Ok)

{

string str = commonOpenFileDialog.FileName;

MessageBox.Show(str);

}

会缩小主窗口

二、使用框架

nuget搜索Ookii.Dialogs.WinForms

.net Framework 4.5+

1 2	VistaFolderBrowserDialog vistaOpenFileDialog = new VistaFolderBrowserDialog(); vistaOpenFileDialog.ShowDialog();

这个不会缩小主窗口。

三、使用代码实现

不会缩小主窗口

文件名：FolderBrowserDialogHelper.cs

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using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Drawing.Design;

using System.Linq;

using System.Runtime.InteropServices;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

using System.Windows.Forms.Design;

namespace WindowsFormsApp

{

#region Editor

/// <summary>

/// FolderBrowser 的设计器基类

/// </summary>

public class FolderNameEditor : UITypeEditor

{

public override UITypeEditorEditStyle GetEditStyle(ITypeDescriptorContext context)

{

return UITypeEditorEditStyle.Modal;

}

public override object EditValue(ITypeDescriptorContext context, IServiceProvider provider, object value)

{

FolderBrowserDialogHelper browser = new FolderBrowserDialogHelper();

if (value != null)

{

browser.DirectoryPath = string.Format("{0}", value);

}

if (browser.ShowDialog(null) == DialogResult.OK)

return browser.DirectoryPath;

return value;

}

#endregion

#region FolderBrowserDialog Base

/// <summary>

/// Vista 样式的选择文件对话框的基类

/// </summary>

[Description("提供一个Vista样式的选择文件对话框")]

[Editor(typeof(FolderNameEditor), typeof(UITypeEditor))]

public class FolderBrowserDialogHelper : Component

{

/// <summary>

/// 初始化 FolderBrowser 的新实例

/// </summary>

public FolderBrowserDialogHelper()

{

}

#region Public Property

/// <summary>

/// 获取在 FolderBrowser 中选择的文件夹路径

/// </summary>

public string DirectoryPath { get; set; }

/// <summary>

/// 向用户显示 FolderBrowser 的对话框

/// </summary>

/// <param name="owner">任何实现 System.Windows.Forms.IWin32Window（表示将拥有模式对话框的顶级窗口）的对象。</param>

/// <returns></returns>

public DialogResult ShowDialog(IWin32Window owner)

{

IntPtr hwndOwner = owner != null ? owner.Handle : GetActiveWindow();

IFileOpenDialog dialog = (IFileOpenDialog)new FileOpenDialog();

try

{

IShellItem item;

if (!string.IsNullOrEmpty(DirectoryPath))

{

IntPtr idl;

uint atts = 0;

if (SHILCreateFromPath(DirectoryPath, out idl, ref atts) == 0)

{

if (SHCreateShellItem(IntPtr.Zero, IntPtr.Zero, idl, out item) == 0)

{

dialog.SetFolder(item);

}

dialog.SetOptions(FOS.FOS_PICKFOLDERS | FOS.FOS_FORCEFILESYSTEM);

uint hr = dialog.Show(hwndOwner);

if (hr == ERROR_CANCELLED)

return DialogResult.Cancel;

if (hr != 0)

return DialogResult.Abort;

dialog.GetResult(out item);

string path;

item.GetDisplayName(SIGDN.SIGDN_FILESYSPATH, out path);

DirectoryPath = path;

return DialogResult.OK;

}

finally

{

Marshal.ReleaseComObject(dialog);

}

#endregion

#region BaseType

[DllImport("shell32.dll")]

private static extern int SHILCreateFromPath([MarshalAs(UnmanagedType.LPWStr)] string pszPath, out IntPtr ppIdl, ref uint rgflnOut);

[DllImport("shell32.dll")]

private static extern int SHCreateShellItem(IntPtr pidlParent, IntPtr psfParent, IntPtr pidl, out IShellItem ppsi);

[DllImport("user32.dll")]

private static extern IntPtr GetActiveWindow();

private const uint ERROR_CANCELLED = 0x800704C7;

[ComImport]

[Guid("DC1C5A9C-E88A-4dde-A5A1-60F82A20AEF7")]

private class FileOpenDialog

{

}

[ComImport]

[Guid("42f85136-db7e-439c-85f1-e4075d135fc8")]

[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]

private interface IFileOpenDialog

{

[PreserveSig]

uint Show([In] IntPtr parent); // IModalWindow

void SetFileTypes(); // not fully defined

void SetFileTypeIndex([In] uint iFileType);

void GetFileTypeIndex(out uint piFileType);

void Advise(); // not fully defined

void Unadvise();

void SetOptions([In] FOS fos);

void GetOptions(out FOS pfos);

void SetDefaultFolder(IShellItem psi);

void SetFolder(IShellItem psi);

void GetFolder(out IShellItem ppsi);

void GetCurrentSelection(out IShellItem ppsi);

void SetFileName([In, MarshalAs(UnmanagedType.LPWStr)] string pszName);

void GetFileName([MarshalAs(UnmanagedType.LPWStr)] out string pszName);

void SetTitle([In, MarshalAs(UnmanagedType.LPWStr)] string pszTitle);

void SetOkButtonLabel([In, MarshalAs(UnmanagedType.LPWStr)] string pszText);

void SetFileNameLabel([In, MarshalAs(UnmanagedType.LPWStr)] string pszLabel);

void GetResult(out IShellItem ppsi);

void AddPlace(IShellItem psi, int alignment);

void SetDefaultExtension([In, MarshalAs(UnmanagedType.LPWStr)] string pszDefaultExtension);

void Close(int hr);

void SetClientGuid(); // not fully defined

void ClearClientData();

void SetFilter([MarshalAs(UnmanagedType.Interface)] IntPtr pFilter);

void GetResults([MarshalAs(UnmanagedType.Interface)] out IntPtr ppenum); // not fully defined

void GetSelectedItems([MarshalAs(UnmanagedType.Interface)] out IntPtr ppsai); // not fully defined

}

[ComImport]

[Guid("43826D1E-E718-42EE-BC55-A1E261C37BFE")]

[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]

private interface IShellItem

{

void BindToHandler(); // not fully defined

void GetParent(); // not fully defined

void GetDisplayName([In] SIGDN sigdnName, [MarshalAs(UnmanagedType.LPWStr)] out string ppszName);

void GetAttributes(); // not fully defined

void Compare(); // not fully defined

}

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_ALLNONSTORAGEITEMS = 0x80,

FOS_ALLOWMULTISELECT = 0x200,

FOS_CREATEPROMPT = 0x2000,

FOS_DEFAULTNOMINIMODE = 0x20000000,

FOS_DONTADDTORECENT = 0x2000000,

FOS_FILEMUSTEXIST = 0x1000,

FOS_FORCEFILESYSTEM = 0x40,

FOS_FORCESHOWHIDDEN = 0x10000000,

FOS_HIDEMRUPLACES = 0x20000,

FOS_HIDEPINNEDPLACES = 0x40000,

FOS_NOCHANGEDIR = 8,

FOS_NODEREFERENCELINKS = 0x100000,

FOS_NOREADONLYRETURN = 0x8000,

FOS_NOTESTFILECREATE = 0x10000,

FOS_NOVALIDATE = 0x100,

FOS_OVERWRITEPROMPT = 2,

FOS_PATHMUSTEXIST = 0x800,

FOS_PICKFOLDERS = 0x20,

FOS_SHAREAWARE = 0x4000,

FOS_STRICTFILETYPES = 4

}

#endregion

}

#endregion

}

然后调用方式：

1 2	FolderBrowserDialogHelper folder = new FolderBrowserDialogHelper(); folder.ShowDialog(this);

而FolderBrowseDialog普通浏览目录选择文件夹对话框

1 2	var fbd = new FolderBrowserDialog(); fbd.ShowDialog();

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