用Treeview实现FolderBrowerDialog 和动态获取系统图标（运用了Win32 dll类库）

其实，FolderBrowerDialog 很好用呢，有木有啊亲。反正我特别的喜欢，微软大哥把这个浏览文件夹的东东封装的多好呀，可是遇到一个变态的客户就不好玩了。

事情是这样子的。我需要做一个下面的东东：

 

这个不难啊，然后就用FolderBrowerDialog这个神器，嗯 还不错，刚开始客户用了也很喜欢。

 

可是过了一段时间之后，客户说 要屏蔽右键功能，他不想让其他通过右键能打开或浏览文件夹，如下面 红色要给屏蔽。

 

我一开始以为只是一个参数问题，就爽快的答应了客户咯。可是啊后来找啊找 找到天荒地老也木有找到。。。放弃了，然后改用了TreeView。。结果，版本出来了，先截图：

 

好吧，确实很丑哦。。

+ View Code?

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public MyDirectory()       {           InitializeComponent();           treeViewDirectory.BeginUpdate();           label1.Text = folderTitle;           treeViewDirectory.ImageList = imageList1;           treeViewDirectory.SelectedImageIndex = 3;           EnumDrivers();           treeViewDirectory.EndUpdate();             this.SetBounds((Screen.GetBounds(this).Width / 2) - (this.Width / 2), (Screen.GetBounds(this).Height / 2) - (this.Height / 2), this.Width, this.Height, BoundsSpecified.Location);       }       public static string folderTitle = "";       private void EnumDrivers()       {           //treeViewDirectory.ImageIndex = 1;           string[] allDriveNames = Directory.GetLogicalDrives();           TreeNode rootNode = new TreeNode();           rootNode.Text = "My Computer";           rootNode.ImageIndex = 1;           rootNode.Expand();           treeViewDirectory.Nodes.Add(rootNode);           treeViewDirectory.SelectedNode = rootNode.FirstNode;           DriveInfo[] allDrives = DriveInfo.GetDrives();           int j = 0;           try           {               int i = 0;               foreach (DriveInfo d in allDrives)               {                   TreeNode tn = new TreeNode(d.Name);                     // GetIcon(d.Name, false)                   this.imageList1.Images.Add(GetIcon(d.Name, false));                     tn.ImageIndex = 2;                                   tn.Tag = d.RootDirectory.FullName;                   treeViewDirectory.Nodes[0].Nodes.Add(tn);                    treeViewDirectory.Nodes[0].Nodes[j].Text = d.Name ;                   ShowDirs(tn);                   j++;               }           }           catch (System.Exception)           {           }       }         private void ShowDirs(TreeNode tn)       {           tn.Nodes.Clear();           try           {               DirectoryInfo DirInfo = new DirectoryInfo(tn.Tag.ToString());               if (!DirInfo.Exists)               {                   return;               }               else               {                   DirectoryInfo[] Dirs;                   try                   {                       Dirs = DirInfo.GetDirectories();                   }                   catch (Exception e)                   {                       return;                   }                   foreach (DirectoryInfo Dir in Dirs)                   {                       TreeNode dir = new TreeNode(Dir.Name);                       dir.ImageIndex = 0;                       dir.Tag = Dir.FullName;                       tn.Nodes.Add(dir);                   }               }           }           catch (System.Exception)           { }       }         private void treeViewDirectory_BeforeExpand(object sender, TreeViewCancelEventArgs e)       {           treeViewDirectory.BeginUpdate();           foreach (TreeNode tn in e.Node.Nodes)           {               ShowDirs(tn);           }           treeViewDirectory.EndUpdate();       }         public static string myValue { set; get; }       private void btnOK_Click(object sender, EventArgs e)       {           MyDirectory.myValue = lastResult;           this.Close();       }         private void btnCancel_Click(object sender, EventArgs e)       {           MyDirectory.myValue = null;           this.Close();       }       private static string lastResult = null;       private void treeViewDirectory_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e)       {           lastResult = null;           string result = e.Node.FullPath;           if (result != "My Computer")           {               if (result.Contains(@"My Computer\") || result.Contains("My Computer"))               {                   int len = 0;                   if (result.Contains(@"My Computer\"))                   {                       len = @"My Computer\".Length;                   }                   else                   {                       len = "My Computer".Length;                   }                   result = result.Substring(len); return result;               }           }       }

虽然 这个时候，把右键点击功能给取消啦，但是接着用户提了三个要求：

1.需要系统自动匹配它的图标

2.要有磁盘容量的大小。。

好吧，然后最后修改一下。这里面用到了 Win32 dll的几个函数，确实很好用呢。。赞一个。。

+ View Code?

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using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; using System.IO; using System.Runtime.InteropServices;   namespace HP.DMT.UI {     public partial class MyDirectory : Form     {           public MyDirectory()         {             InitializeComponent();             treeViewDirectory.BeginUpdate();             label1.Text = folderTitle;             treeViewDirectory.ImageList = imageList1;             treeViewDirectory.SelectedImageIndex = 3;             EnumDrivers();             treeViewDirectory.EndUpdate();               this.SetBounds((Screen.GetBounds(this).Width / 2) - (this.Width / 2), (Screen.GetBounds(this).Height / 2) - (this.Height / 2), this.Width, this.Height, BoundsSpecified.Location);         }         public static string folderTitle = "";         private void EnumDrivers()         {             //treeViewDirectory.ImageIndex = 1;             string[] allDriveNames = Directory.GetLogicalDrives();             TreeNode rootNode = new TreeNode();             rootNode.Text = "My Computer";             rootNode.ImageIndex = 1;             rootNode.Expand();             treeViewDirectory.Nodes.Add(rootNode);             treeViewDirectory.SelectedNode = rootNode.FirstNode;             DriveInfo[] allDrives = DriveInfo.GetDrives();             int j = 0;             try             {                 int i = 0;                 foreach (DriveInfo d in allDrives)                 {                     TreeNode tn = new TreeNode(d.Name);                       // GetIcon(d.Name, false)                     this.imageList1.Images.Add(GetIcon(d.Name, false));                       tn.ImageIndex = 4 + i;                     i++;                     tn.Tag = d.RootDirectory.FullName;                     treeViewDirectory.Nodes[0].Nodes.Add(tn);                     if (d.DriveType.ToString() == "Fixed")                     {                         treeViewDirectory.Nodes[0].Nodes[j].Text = d.Name + "(" + d.DriveType.ToString() + "," + d.TotalFreeSpace / 1024 / 1024 / 1024 + "G/" + d.TotalSize / 1024 / 1024 / 1024 + "G)";                     }                     else                     {                         treeViewDirectory.Nodes[0].Nodes[j].Text = d.Name + "(" + d.DriveType.ToString() + ")";                     }                     ShowDirs(tn);                     j++;                 }             }             catch (System.Exception)             {             }         }           private void ShowDirs(TreeNode tn)         {             tn.Nodes.Clear();             try             {                 DirectoryInfo DirInfo = new DirectoryInfo(tn.Tag.ToString());                 if (!DirInfo.Exists)                 {                     return;                 }                 else                 {                     DirectoryInfo[] Dirs;                     try                     {                         Dirs = DirInfo.GetDirectories();                     }                     catch (Exception e)                     {                         return;                     }                     foreach (DirectoryInfo Dir in Dirs)                     {                         TreeNode dir = new TreeNode(Dir.Name);                         dir.ImageIndex = 0;                         dir.Tag = Dir.FullName;                         tn.Nodes.Add(dir);                     }                 }             }             catch (System.Exception)             { }         }           private void treeViewDirectory_BeforeExpand(object sender, TreeViewCancelEventArgs e)         {             treeViewDirectory.BeginUpdate();             foreach (TreeNode tn in e.Node.Nodes)             {                 ShowDirs(tn);             }             treeViewDirectory.EndUpdate();         }           public static string myValue { set; get; }         private void btnOK_Click(object sender, EventArgs e)         {             MyDirectory.myValue = lastResult;             this.Close();         }           private void btnCancel_Click(object sender, EventArgs e)         {             MyDirectory.myValue = null;             this.Close();         }         private static string lastResult = null;         private void treeViewDirectory_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e)         {             lastResult = null;             string result = e.Node.FullPath;             if (result != "My Computer")             {                 if (result.Contains(@"My Computer\") || result.Contains("My Computer"))                 {                     int len = 0;                     if (result.Contains(@"My Computer\"))                     {                         len = @"My Computer\".Length;                     }                     else                     {                         len = "My Computer".Length;                     }                     result = result.Substring(len);                       char[] arrs = result.ToCharArray();                     int beforLenth = result.Remove(result.IndexOf('/') + 1).Length;                     int afterLenth = result.Substring(result.IndexOf('/') + 1).Remove(result.Substring(result.IndexOf('/') + 1).IndexOf(')')).Length;                       char[] c = { ')' };                     string str1 = result.Substring(0, 3);                     string str2 = result.Substring(result.IndexOfAny(c, beforLenth + afterLenth, 1) + 1);                       lastResult = str1 + str2;                 }             }         }               [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]         public struct SHFILEINFO         {             public IntPtr hIcon;             public int iIcon;             public uint dwAttributes;             [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 260)]             public string szDisplayName;             [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 80)]             public string szTypeName;         }           [DllImport("Shell32.dll", EntryPoint = "SHGetFileInfo", SetLastError = true, CharSet = CharSet.Auto)]         public static extern IntPtr SHGetFileInfo(string pszPath, uint dwFileAttributes, ref SHFILEINFO psfi, uint cbFileInfo, uint uFlags);           [DllImport("User32.dll", EntryPoint = "DestroyIcon")]         public static extern int DestroyIcon(IntPtr hIcon);             public const uint SHGFI_ICON = 0x100;         public const uint SHGFI_LARGEICON = 0x0;         public const uint SHGFI_SMALLICON = 0x1;         public const uint SHGFI_USEFILEATTRIBUTES = 0x10;           static Icon GetIcon(string fileName, bool isLargeIcon)         {             SHFILEINFO shfi = new SHFILEINFO();             IntPtr hI;               if (isLargeIcon)                 hI = MyDirectory.SHGetFileInfo(fileName, 0, ref shfi,                      (uint)Marshal.SizeOf(shfi), MyDirectory.SHGFI_ICON | MyDirectory.SHGFI_USEFILEATTRIBUTES | MyDirectory.SHGFI_LARGEICON);             else                 hI = MyDirectory.SHGetFileInfo(fileName, 0, ref shfi, (uint)Marshal.SizeOf(shfi), MyDirectory.SHGFI_ICON | MyDirectory.SHGFI_USEFILEATTRIBUTES | MyDirectory.SHGFI_SMALLICON);             Icon icon = Icon.FromHandle(shfi.hIcon).Clone() as Icon;             MyDirectory.DestroyIcon(shfi.hIcon);             return icon;         }     } }

结果如下：

核心代码是：

?

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]

        public struct SHFILEINFO

        {

            public IntPtr hIcon;

            public int iIcon;

            public uint dwAttributes;

            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 260)]

            public string szDisplayName;

            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 80)]

            public string szTypeName;

        }

 

        [DllImport("Shell32.dll", EntryPoint = "SHGetFileInfo", SetLastError = true, CharSet = CharSet.Auto)]

        public static extern IntPtr SHGetFileInfo(string pszPath, uint dwFileAttributes, ref SHFILEINFO psfi, uint cbFileInfo, uint uFlags);

 

        [DllImport("User32.dll", EntryPoint = "DestroyIcon")]

        public static extern int DestroyIcon(IntPtr hIcon);

 

 

        public const uint SHGFI_ICON = 0x100;

        public const uint SHGFI_LARGEICON = 0x0;

        public const uint SHGFI_SMALLICON = 0x1;

        public const uint SHGFI_USEFILEATTRIBUTES = 0x10;

 

        static Icon GetIcon(string fileName, bool isLargeIcon)

        {

            SHFILEINFO shfi = new SHFILEINFO();

            IntPtr hI;

 

            if (isLargeIcon)

                hI = MyDirectory.SHGetFileInfo(fileName, 0, ref shfi,

                     (uint)Marshal.SizeOf(shfi), MyDirectory.SHGFI_ICON | MyDirectory.SHGFI_USEFILEATTRIBUTES | MyDirectory.SHGFI_LARGEICON);

            else

                hI = MyDirectory.SHGetFileInfo(fileName, 0, ref shfi, (uint)Marshal.SizeOf(shfi), MyDirectory.SHGFI_ICON | MyDirectory.SHGFI_USEFILEATTRIBUTES | MyDirectory.SHGFI_SMALLICON);

            Icon icon = Icon.FromHandle(shfi.hIcon).Clone() as Icon;

            MyDirectory.DestroyIcon(shfi.hIcon);

            return icon;

        }

 很好懂呢，只需要在程序中调用一下就ok啦。

 

--------------------2013.8.6 modify--------------------

//Get Stroage Path
    private void btnOpenFolder_Click(object sender, EventArgs e)
    {
      string storagePath = WinFileManage.OpenFolderAndGetPath(this);
      if (storagePath != "")
        tbStoragePath.Text = storagePath;
    }

然后新建一个WinFileManger

class WinFileManage
  {

    //If needed, we can add more parameters for this function
    public static string OpenFolderAndGetPath(IWin32Window owner)
    {
      FolderBrowserDialogEx fbde = new FolderBrowserDialogEx();
      fbde.Title = "Please select the folder";
      fbde.RootFolder = Environment.SpecialFolder.MyComputer;
      fbde.SelectedPath = "";
      //fbde.StartPosition = FormStartPosition.CenterScreen;
      
      DialogResult dr = fbde.ShowDialog(owner);
      if (dr == DialogResult.OK)
        return fbde.SelectedPath;
      else
        return "";
    }


  }

这里需要用到FolderBrowserDialogEx 这个WIN API 函数。