1.往wpf中拖文件
// xaml <Grid x:Name="grid_11" DragOver="Grid_11_DragOver" Drop="Grid_11_Drop" AllowDrop="True" Background="Red"/> // xaml.cs /// <summary> /// 包含目录文件判断 /// </summary> /// <param name="files"></param> /// <returns></returns> private bool HasDirectory(string[] files) { if (files == null) return false; for (int i = 0; i < files.Length; i++) { if (System.IO.Directory.Exists(files[i])) { return true; } } return false; } /// <summary> /// 抛弃文件夹目标 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void Grid_11_DragOver(object sender, DragEventArgs e) { var files = (string[])e.Data.GetData(DataFormats.FileDrop); if (HasDirectory(files)) { e.Effects = DragDropEffects.None;// 抛弃这一次的拖拽源 e.Handled = true; } } /// <summary> /// 放下文件获取路径 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void Grid_11_Drop(object sender, DragEventArgs e) { var files = (string[])e.Data.GetData(DataFormats.FileDrop); if (files == null || HasDirectory(files)) return; for(int i = 0; i < files.Length; i++) { Console.WriteLine(files[i]); } }
2.wpf中往外拖文件
private void Button_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)// 右键拖拽的时候，创建一个drop源 { // 多文件拖拽 #region 获取拖拽的文件的个数 int fileCount = 1; #endregion FileDDWatcher.Instance.StartWatcher(fileCount);// 启动文件挪移监控,传入文件挪移的个数 #region 创建临时文件并反馈临时路径,paths挪移的目标 string dir = System.IO.Path.Combine(System.IO.Path.GetTempPath(), "TempDirectory"); if (!System.IO.Directory.Exists(dir)) { System.IO.Directory.CreateDirectory(dir); } string[] paths = new string[fileCount]; for (int i = 0; i < fileCount; i++) { string path = System.IO.Path.Combine(dir, $"fileName{i}.download"); System.IO.File.Create(path).Close();// 拖动的时候创建 paths[i] = path; } #endregion #region 拖拽代码 ListView lv = new ListView(); string dataFormat = DataFormats.FileDrop; DataObject dataObject = new DataObject(dataFormat, paths);//(listview.SelectedItems.Cast<string>()).ToArray<string>()); DragDropEffects dde = DragDrop.DoDragDrop(lv, dataObject, DragDropEffects.Copy); #endregion FileDDWatcher.Instance.StopWatcher();// 停止文件监控 #region 拖拽成功之后获取目标的路径 Console.WriteLine($"dropdrag status = {dde}"); if (dde == DragDropEffects.Copy)// 拖拽成功 { string[] ls = FileDDWatcher.Instance.GetTempFilePath();// 获取拖拽之后的目录 if (ls != null && ls.Length > 0) { for (int i = 0; i < ls.Length; i++) { Console.WriteLine($"Target catalogue {ls[i]}"); } } else { Console.WriteLine("no file path copy"); } } #endregion }
监控文件的代码
public class FileDDWatcher { #region property && fileds private Hashtable tempWatchers = null; private Queue<string> pathQueue = new Queue<string>(); private int moveFileCount = 0; #endregion #region instance private static object ooo = new object(); private static FileDDWatcher _instance; public static FileDDWatcher Instance { get { lock (ooo) { if (_instance == null) { _instance = new FileDDWatcher(); } return _instance; } } } private FileDDWatcher() { } #endregion #region method #region private /// <summary> /// 文件监控触发的事件 /// </summary> /// <returns></returns> private void OnCreated(object source, FileSystemEventArgs e) { string path = System.IO.Path.Combine(System.IO.Path.GetTempPath(), "TempDirectory"); if (e.FullPath.Contains(path)) { return; } pathQueue.Enqueue(e.FullPath); } #endregion #region public /// <summary> /// 启动文件监控，传入移动文件的个数，默认是1个 /// </summary> /// <returns></returns> public bool StartWatcher(int fileCount = 1) { LogHelper.WriteInfo("StartWatcher"); try { moveFileCount = fileCount; int i = 1; if (tempWatchers == null || tempWatchers.Count <= 0) { tempWatchers = new Hashtable(); foreach (string driveName in Directory.GetLogicalDrives()) { if (Directory.Exists(driveName)) { FileSystemWatcher watcher = new FileSystemWatcher(); watcher.Filter = "*.download"; watcher.NotifyFilter = NotifyFilters.FileName; watcher.Created -= OnCreated; watcher.Created += OnCreated; watcher.IncludeSubdirectories = true;// 必须要的，监控子集目录 watcher.Path = driveName; LogHelper.WriteInfo(driveName); watcher.EnableRaisingEvents = true; tempWatchers.Add("file_watcher" + i.ToString(), watcher); i++; } } } return true; } catch (Exception ex) { LogHelper.WriteError(ex.Message); return false; } } /// <summary> /// 停止文件监控，如果队列中路径数量和文件移动数量一致，就不重置文件传输个数 /// </summary> /// <returns></returns> public bool StopWatcher() { try {if (tempWatchers != null && tempWatchers.Count > 0) { LogHelper.WriteInfo(tempWatchers.Count + ""); for (int i = 1; i <= tempWatchers.Count; i++) { ((FileSystemWatcher)tempWatchers["file_watcher" + i.ToString()]).Dispose(); } tempWatchers.Clear(); tempWatchers = null; } return true; } catch (Exception ex) { return false; } finally { moveFileCount = 0; } } /// <summary> /// 返回文件保存的路径 /// </summary> /// <returns></returns> public string[] GetTempFilePath() { try { int length = pathQueue.Count; if (length <= 0) { return new string[0]; } string[] ls = new string[length]; for (int i = 0; i < length; i++) { ls[i] = pathQueue.Dequeue(); } return ls; } catch (Exception ex) { return new string[0]; } finally { moveFileCount = 0; } } #endregion #endregion }