* DirEx：增加一个文件夹选择框

SunnyUI/Static/UDir.cs

@@ -49,12 +49,12 @@ namespace Sunny.UI
         /// <param name="dir">返回true则path为选择文件夹路径</param>
         /// <param name="showNewButton">显示新建文件夹按钮</param>
         /// <returns>是否选择文件夹</returns>
-        public static bool SelectDir(string desc, out string dir, bool showNewButton = true)
+        public static bool SelectDir(string desc, ref string dir, bool showNewButton = true)
         {
-            dir = string.Empty;
             bool bOk = false;
             using (FolderBrowserDialog fd = new FolderBrowserDialog { Description = desc, ShowNewFolderButton = showNewButton })
             {
+                fd.SelectedPath = dir;
                 if (fd.ShowDialog() == DialogResult.OK)
                 {
                     dir = fd.SelectedPath.DealPath();
@@ -65,6 +65,27 @@ namespace Sunny.UI
             return bOk;
         }
 
+        /// <summary>
+        /// 选择文件夹
+        /// </summary>
+        /// <param name="desc">说明</param>
+        /// <param name="dir">返回true则path为选择文件夹路径</param>
+        /// <returns>是否选择文件夹</returns>
+        public static bool SelectDirEx(string desc, ref string dir)
+        {
+            bool bOk = false;
+            using (FolderBrowserDialogEx fd = new FolderBrowserDialogEx { Description = desc, DirectoryPath = dir })
+            {
+                if (fd.ShowDialog(null) == DialogResult.OK)
+                {
+                    dir = fd.DirectoryPath.DealPath();
+                    bOk = true;
+                }
+            }
+
+            return bOk;
+        }
+
         /// <summary>
         /// Temp文件夹，末尾包括\
         /// </summary>

SunnyUI/Units/UFolderBrowserDialogEx.cs

@@ -0,0 +1,232 @@
+using System;
+using System.ComponentModel;
+using System.Drawing.Design;
+using System.Runtime.InteropServices;
+using System.Windows.Forms;
+// ReSharper disable UnusedMember.Local
+
+namespace Sunny.UI
+{
+    #region Editor
+    /// <summary>
+    /// FolderBrowser 的设计器基类
+    /// </summary>
+    public class FolderNameEditorEx : UITypeEditor
+    {
+        public override UITypeEditorEditStyle GetEditStyle(ITypeDescriptorContext context)
+        {
+            return UITypeEditorEditStyle.Modal;
+        }
+        public override object EditValue(ITypeDescriptorContext context, IServiceProvider provider, object value)
+        {
+            FolderBrowserDialogEx browser = new FolderBrowserDialogEx();
+            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(FolderNameEditorEx), typeof(UITypeEditor))]
+    [ToolboxItem(false)]
+    public class FolderBrowserDialogEx : Component
+    {
+        #region Public Property
+
+        // 
+        // 摘要: 
+        //     获取或设置对话框中在树视图控件上显示的说明文本。
+        //
+        // 返回结果:
+        //     要显示的说明。 默认值为空字符串("")。
+        /// <summary>
+        /// 标题
+        /// </summary>
+        [Browsable(true)]
+        [DefaultValue(null)]
+        [Localizable(true)]
+        [Description("自定义标题")]
+        public string Description { get; set; }
+
+        /// <summary>
+        /// 选择的文件夹路径（也可以设置默认选择的路径）
+        /// </summary>
+        [Browsable(true)]
+        [DefaultValue(null)]
+        [Description("默认路径/返回路径")]
+        public string DirectoryPath { get; set; }
+        /// <summary>
+        /// 强制显示隐藏文件和文件夹
+        /// </summary>
+        [Browsable(true)]
+        [DefaultValue(false)]
+        [Description("显示隐藏文件")]
+        public bool ShowHidden { 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 handle = owner?.Handle ?? GetActiveWindow();
+            IFileOpenDialog dialog = (IFileOpenDialog)new FileOpenDialog();
+            try
+            {
+                IShellItem item;
+                //如果选择路径不为空，则设置默认文件夹
+                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);
+                        }
+                    }
+                }
+                //自定义标题
+                if (!string.IsNullOrEmpty(Description))
+                {
+                    dialog.SetTitle(Description);
+                }
+                //是否显示隐藏文件
+                if (ShowHidden)
+                {
+                    //本人扩展的项目
+                    dialog.SetOptions(FOS.FOS_PICKFOLDERS | FOS.FOS_FORCEFILESYSTEM | FOS.FOS_FORCESHOWHIDDEN);
+                }
+                else
+                {
+                    //原作者代码
+                    dialog.SetOptions(FOS.FOS_PICKFOLDERS | FOS.FOS_FORCEFILESYSTEM);
+                }
+                uint hr = dialog.Show(handle);
+                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, //需要采用GetResults获取结果，未实现
+            FOS_CREATEPROMPT = 0x2000,
+            FOS_DEFAULTNOMINIMODE = 0x20000000,
+            FOS_DONTADDTORECENT = 0x2000000,
+            FOS_FILEMUSTEXIST = 0x1000,
+            FOS_FORCEFILESYSTEM = 0x40,
+            FOS_FORCESHOWHIDDEN = 0x10000000, //强制显示隐藏文件
+            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
+}