实例介绍
使用双缓冲TreeView,listView,实现目录文件浏览,代码简单400行,不闪烁,可显示文件夹不同状态图标,可应用于自定义的文件对话框等,可根据需要自行继续简化。
using Microsoft.Win32; using System; using System.Collections.Generic; using System.Drawing; using System.IO; using System.Linq; using System.Management; using System.Runtime.InteropServices; using System.Windows.Forms; namespace Disk1 { public partial class Form1 : Form { public static class getIcon { [DllImport("Shell32.dll")] static extern int SHGetFileInfo(string pszPath, uint dwFileAttributes, ref SHFILEINFO psfi, int cbFileInfo, uint uFlags); struct SHFILEINFO { public IntPtr hIcon; public int iIcon; public int dwAttributes; public char szDisplayName; public char szTypeName; } static public Icon GetFileIcon(string fileName, bool smallIcon) { SHFILEINFO fi = new SHFILEINFO(); Icon ic = null; int iTotal = (int)SHGetFileInfo(fileName, 100, ref fi, 0, (uint)(smallIcon ? 273 : 272)); if (iTotal > 0) { ic = Icon.FromHandle(fi.hIcon); } return ic; } } public class TreeViewEx : TreeView { protected override void OnHandleCreated(EventArgs e) { SendMessage(this.Handle, TVM_SETEXTENDEDSTYLE, (IntPtr)TVS_EX_DOUBLEBUFFER, (IntPtr)TVS_EX_DOUBLEBUFFER); base.OnHandleCreated(e); } private const int TVM_SETEXTENDEDSTYLE = 0x1100 44; private const int TVM_GETEXTENDEDSTYLE = 0x1100 45; private const int TVS_EX_DOUBLEBUFFER = 0x0004; [DllImport("user32.dll")] private static extern IntPtr SendMessage(IntPtr hWnd, int msg, IntPtr wp, IntPtr lp); } public class ListViewEx : ListView { public ListViewEx() { SetStyle(ControlStyles.DoubleBuffer | ControlStyles.OptimizedDoubleBuffer | ControlStyles.AllPaintingInWmPaint, true); UpdateStyles(); } } TreeViewEx treeView1; ListViewEx listView1; public static int BrowNumber = 0, BrowRecord = 0, AssNumber = 0; public class RecordBrow { public string Dir_Name; public RecordBrow(string _name) { Dir_Name = _name; BrowNumber = 1; } } public static List<RecordBrow> recordBrows = new List<RecordBrow>(); public class FileAssociated { public int Id; public string AssociatedType; public Bitmap AssociatedIcon; public FileAssociated(int _id, string _type, Bitmap _icon) { Id = _id; AssociatedType = _type; AssociatedIcon = _icon; } } public static List<FileAssociated> fileAssociateds = new List<FileAssociated>(); public class DirectoryFile { public string Fullname; public string DFname; public string DFtype; public int DFicon; public string DFtime; public long DFsize; public int DFflag; public DirectoryFile(string _full, string _name, string _type,int _icon, string _time,long _size,int _flag) { Fullname = _full; DFname = _name; DFtype = _type; DFicon = _icon; DFtime = _time; DFsize = _size; DFflag = _flag; } } public static List<DirectoryFile> directoryFiles = new List<DirectoryFile>(); public Form1() { InitializeComponent(); treeView1 = new TreeViewEx() { ItemHeight = 22, Size = new Size(376, 546), Location = new Point(12, 41), Font = new Font("微软雅黑", 9), ImageList = imageList1, ShowLines = false, ShowRootLines = false, ShowPlusMinus = false, }; treeView1.NodeMouseClick = treeView1_NodeMouseClick; this.Controls.Add(treeView1); listView1 = new ListViewEx() { Size = new Size(515, 547), Location = new Point(442, 40), Font = new Font("微软雅黑", 9), View = View.Details, GridLines = false, SmallImageList = imageList2, FullRowSelect = true, }; listView1.Columns.Add("文件名", 120, HorizontalAlignment.Left); listView1.Columns.Add("文件类型", 120, HorizontalAlignment.Left); listView1.Columns.Add("修改时间", 120, HorizontalAlignment.Left); listView1.Columns.Add("大小", 120, HorizontalAlignment.Left); listView1.DoubleClick = ListView1_DoubleClick; this.Controls.Add(listView1); ManagementObjectCollection queryCollection = getDrives(); treeView1.Nodes.Clear(); foreach (ManagementObject mo in queryCollection) { TreeNode node1 = new TreeNode(); node1.Text = mo["Name"].ToString(); node1.Name = mo["Name"].ToString() "\\"; node1.ImageIndex = 0; node1.Tag = 0; treeView1.Nodes.Add(node1); } get_SubDirFile(treeView1.Nodes[0].Name); SearchNode(treeView1.Nodes, treeView1.Nodes[0].Name); recordBrows.Add(new RecordBrow(treeView1.Nodes[0].Name)); } protected ManagementObjectCollection getDrives() { ManagementObjectSearcher query = new ManagementObjectSearcher("SELECT * From Win32_LogicalDisk "); ManagementObjectCollection queryCollection = query.Get(); return queryCollection; } public void get_SubDirFile(string _path) { directoryFiles.Clear(); listView1.Items.Clear(); DirectoryInfo dir = new DirectoryInfo(_path); try { DirectoryInfo[] subDirector = dir.GetDirectories(); for (int i = 0; i < subDirector.Length; i ) { directoryFiles.Add(new DirectoryFile(subDirector[i].FullName, subDirector[i].FullName.Replace(_path, "").Replace("\\", "") ,"文件夹",0 , subDirector[i].LastWriteTime.ToShortDateString() subDirector[i].LastWriteTime.ToShortTimeString(),0,0)); } } catch { } DirectoryInfo Files = new DirectoryInfo(_path); try { FileInfo[] files = Files.GetFiles("*.*"); for (int i = 0; i < files.Length; i ) { string _type = GetFileTypeDesection(files[i].Extension); int img_Index = 0; var _fa = fileAssociateds.Where(fa=>fa.AssociatedType==_type).ToList(); if (_fa.Count<1) { Bitmap _bmp = new Bitmap(20, 20); Graphics g = Graphics.FromImage(_bmp); g.DrawImage(getIcon.GetFileIcon(files[i].FullName, true).ToBitmap(),new PointF(2,2)); imageList2.Images.Add(_bmp); AssNumber = 1; img_Index = AssNumber; } else { img_Index = _fa[0].Id 1; } directoryFiles.Add(new DirectoryFile(files[i].FullName, files[i].FullName.Replace(_path, "").Replace("\\", ""), _type, img_Index, files[i].LastWriteTime.ToShortDateString() files[i].LastWriteTime.ToShortTimeString(), files[i].Length,1)); } } catch { } listView1.BeginUpdate(); for (int i=0;i<directoryFiles.Count;i ) { ListViewItem lvi = new ListViewItem(); lvi.ImageIndex = directoryFiles[i].DFicon; lvi.Text = directoryFiles[i].DFname; lvi.SubItems.Add(directoryFiles[i].DFtype); lvi.SubItems.Add(directoryFiles[i].DFtime); if (directoryFiles[i].DFflag==0) lvi.SubItems.Add(""); else lvi.SubItems.Add(directoryFiles[i].DFsize.ToString("N0")); listView1.Items.Add(lvi); } listView1.EndUpdate(); } public void get_SubDir() { if (treeView1.SelectedNode.Nodes.Count < 1) { DirectoryInfo dir = new DirectoryInfo(treeView1.SelectedNode.Name); try { DirectoryInfo[] subDirector = dir.GetDirectories(); for (int i = 0; i < subDirector.Length; i ) { TreeNode node1 = new TreeNode(); node1.Name = subDirector[i].FullName; node1.Tag = 1; node1.ImageIndex = 2; node1.SelectedImageIndex = 2; DirectoryInfo has_sub = new DirectoryInfo(node1.Name); try { DirectoryInfo[] hasDir = has_sub.GetDirectories(); if (hasDir.Length < 1) { node1.ImageIndex = 4; node1.SelectedImageIndex = 4; node1.Tag = 4; } } catch { node1.ImageIndex = 4; node1.SelectedImageIndex = 4; node1.Tag = 4; } node1.Text = node1.Name.Replace(treeView1.SelectedNode.Name, "").Replace("\\", ""); treeView1.SelectedNode.Nodes.Add(node1); } } catch { } } } private void SearchNode(TreeNodeCollection tnds, string text) { foreach (TreeNode tnd in tnds) { if (tnd.Name.Equals(text)) { treeView1.SelectedNode = tnd; break; } if (tnd.Nodes.Count != 0) { SearchNode(tnd.Nodes, text); } } textBox1.Text = text; treeView1.Focus(); } private void treeView1_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e) { Cursor = Cursors.WaitCursor; get_SubDirFile(e.Node.Name); SearchNode(treeView1.Nodes, e.Node.Name); get_SubDir(); if (e.Node.Nodes.Count < 1) { if ((int)e.Node.Tag == 0) { e.Node.SelectedImageIndex = 0; e.Node.ImageIndex = 0; } else if ((int)e.Node.Tag == 1) { e.Node.SelectedImageIndex = 4; e.Node.ImageIndex = 4; } } else { if (e.Node.IsExpanded) { e.Node.Collapse(); if ((int)e.Node.Tag == 0) { e.Node.SelectedImageIndex = 0; e.Node.ImageIndex = 0; } else if ((int)e.Node.Tag == 1) { e.Node.SelectedImageIndex = 2; e.Node.ImageIndex = 2; } setchild(e.Node); } else { e.Node.Expand(); if ((int)e.Node.Tag == 0) { e.Node.SelectedImageIndex = 1; e.Node.ImageIndex = 1; } else if ((int)e.Node.Tag == 1) { e.Node.SelectedImageIndex = 3; e.Node.ImageIndex = 3; } } } Cursor = Cursors.Default; if (e.Node.Name!=recordBrows[BrowNumber-1].Dir_Name) // 最后浏览记录不相同就记录 { BrowRecord = 1; recordBrows.Add( new RecordBrow(e.Node.Name) ); } } private void ListView1_DoubleClick(object sender, EventArgs e) { var items = listView1.SelectedItems; Cursor = Cursors.WaitCursor; int _index = listView1.Items[listView1.SelectedIndices[0]].Index; if (directoryFiles[_index].DFflag == 0) { if (directoryFiles[_index].Fullname != recordBrows[BrowNumber - 1].Dir_Name) { BrowRecord = 1; recordBrows.Add(new RecordBrow(directoryFiles[_index].Fullname)); } textBox1.Text = directoryFiles[_index].Fullname; SearchNode(treeView1.Nodes, directoryFiles[_index].Fullname); get_SubDirFile(directoryFiles[_index].Fullname); get_SubDir(); } Cursor = Cursors.Default; } private void setchild(TreeNode node) { foreach (TreeNode child in node.Nodes) { if ((int)child.Tag == 0) { child.ImageIndex = 0; } else if ((int)child.Tag == 1) { child.ImageIndex = 2; } setchild(child); } } // 前进 private void button1_Click(object sender, EventArgs e) { int _reco = (BrowRecord 1) > (BrowNumber - 1) ? (BrowNumber - 1) : (BrowRecord 1); if (_reco != BrowRecord) { BrowRecord = _reco; SearchNode(treeView1.Nodes, recordBrows[BrowRecord].Dir_Name); get_SubDirFile(recordBrows[BrowRecord].Dir_Name); } treeView1.Focus(); } // 后退 private void button2_Click(object sender, EventArgs e) { int _reco = (BrowRecord - 1) < 0 ? 0 : (BrowRecord - 1); if (_reco != BrowRecord) { BrowRecord = _reco; SearchNode(treeView1.Nodes, recordBrows[BrowRecord].Dir_Name); get_SubDirFile(recordBrows[BrowRecord].Dir_Name); } treeView1.Focus(); } public static string GetFileTypeDesection(string _ext) { string value; try { string desc = (string)Registry.ClassesRoot.OpenSubKey(_ext).GetValue(null); if (desc != null) value = (string)Registry.ClassesRoot.OpenSubKey(desc).GetValue(null); else value = _ext.Replace(".", "") " 文件"; } catch { value = _ext.Replace(".","") " 文件"; } return value; } } }
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