好的，我已经有一段时间了。我有一个程序监视一个文件“lab.txt”的更改，当它发生更改时，我希望它将文件的内容重新加载到显示的列表框中。我可以让它显示并告诉我什么时候有变化，但我不能让列表框刷新。任何帮助都会受到谴责。现在有很多代码没有被使用，因为我一直在尝试不同的方法，所以请不要理会。
namespace FileChangeNotifier
{
public partial class frmNotifier : Form
{
private StringBuilder m_Sb;
private bool m_bDirty;
private System.IO.FileSystemWatcher m_Watcher;
private bool m_bIsWatching;
public static string txtPath = "E:/lab.txt";
List<string> list;
BindingList<string> bindingList;
public frmNotifier()
{
InitializeComponent();
m_Sb = new StringBuilder();
m_bDirty = false;
m_bIsWatching = false;
//BindingSource bindingSource = (BindingSource)listBox1.DataSource;
// List SourceList = (List)bindingSource.List;
list= new List<string>(File.ReadLines(txtPath));
bindingList = new BindingList<string>(list);
listBox1.DataSource = bindingList;
//listBox1.SelectedIndex = -1;
m_bIsWatching = true;
btnWatchFile.BackColor = Color.Red;
m_Watcher = new System.IO.FileSystemWatcher();
m_Watcher.Filter = "lab.txt";
m_Watcher.Path = "E:\\";
m_Watcher.NotifyFilter = NotifyFilters.LastAccess | NotifyFilters.LastWrite
| NotifyFilters.FileName | NotifyFilters.DirectoryName;
m_Watcher.Changed += new FileSystemEventHandler(OnChanged);
m_Watcher.Created += new FileSystemEventHandler(OnChanged);
m_Watcher.Deleted += new FileSystemEventHandler(OnChanged);
m_Watcher.Renamed += new RenamedEventHandler(OnRenamed);
m_Watcher.EnableRaisingEvents = true;
}
private void btnWatchFile_Click(object sender, EventArgs e)
{
if (m_bIsWatching)
{
m_bIsWatching = false;
m_Watcher.EnableRaisingEvents = false;
m_Watcher.Dispose();
btnWatchFile.BackColor = Color.LightSkyBlue;
btnWatchFile.Text = "Start Watching";
}
else
{
m_bIsWatching = true;
btnWatchFile.BackColor = Color.Red;
btnWatchFile.Text = "Stop Watching";
m_Watcher = new System.IO.FileSystemWatcher();
//if (rdbDir.Checked)
//
m_Watcher.Filter = "lab.txt";
m_Watcher.Path = "E:\\";
//
/*lse
{
m_Watcher.Filter = txtFile.Text.Substring(txtFile.Text.LastIndexOf('\\') + 1);
m_Watcher.Path = txtFile.Text.Substring(0, txtFile.Text.Length - m_Watcher.Filter.Length);
}
if (chkSubFolder.Checked)
{
m_Watcher.IncludeSubdirectories = true;
}*/
m_Watcher.NotifyFilter = NotifyFilters.LastAccess | NotifyFilters.LastWrite
| NotifyFilters.FileName | NotifyFilters.DirectoryName;
m_Watcher.Changed += new FileSystemEventHandler(OnChanged);
m_Watcher.Created += new FileSystemEventHandler(OnChanged);
m_Watcher.Deleted += new FileSystemEventHandler(OnChanged);
m_Watcher.Renamed += new RenamedEventHandler(OnRenamed);
m_Watcher.EnableRaisingEvents = true;
}
}
private void OnChanged(object sender, FileSystemEventArgs e)
{
if (!m_bDirty)
{
m_Sb.Remove(0, m_Sb.Length);
m_Sb.Append(e.FullPath);
m_Sb.Append(" ");
m_Sb.Append(e.ChangeType.ToString());
m_Sb.Append(" ");
m_Sb.Append(DateTime.Now.ToString());
m_bDirty = true;
}
}
private void OnRenamed(object sender, RenamedEventArgs e)
{
if (!m_bDirty)
{
m_Sb.Remove(0, m_Sb.Length);
m_Sb.Append(e.OldFullPath);
m_Sb.Append(" ");
m_Sb.Append(e.ChangeType.ToString());
m_Sb.Append(" ");
m_Sb.Append("to ");
m_Sb.Append(e.Name);
m_Sb.Append(" ");
m_Sb.Append(DateTime.Now.ToString());
m_bDirty = true;
}
}
private void tmrEditNotify_Tick(object sender, EventArgs e)
{
if (m_bDirty)
{
lstNotification.BeginUpdate();
lstNotification.Items.Add(m_Sb.ToString());
lstNotification.EndUpdate();
m_bDirty = false;
}
}
private void btnBrowseFile_Click(object sender, EventArgs e)
{
}
private void btnLog_Click(object sender, EventArgs e)
{
DialogResult resDialog = dlgSaveFile.ShowDialog();
if (resDialog.ToString() == "OK")
{
FileInfo fi = new FileInfo(dlgSaveFile.FileName);
StreamWriter sw = fi.CreateText();
foreach (string sItem in lstNotification.Items)
{
sw.WriteLine(sItem);
}
sw.Close();
}
}
public void bindData()
{
listBox1.DataSource = null;
bindingList=null;
list = new List<string>(File.ReadLines(txtPath));
bindingList = new BindingList<string>(list);
listBox1.DataSource = bindingList;
}
private void Execute(object sender, EventArgs e)
{
string task = TaskQue.Pop();
//execute task;
listBox1.DataSource = TaskQue.GetTasks();
}
private void AddTask(object sender, EventArgs e)
{
TaskQue.Push(listBox1.Text);
listBox1.DataSource = TaskQue.GetTasks();
}
private void txtFile_TextChanged(object sender, EventArgs e)
{
}
private void lstNotification_SelectedIndexChanged(object sender, EventArgs e)
{
}
private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
{
}
}
public class TaskQue
{
public static string txtPath = "E:/lab.txt";
public static string Pop()
{
StreamReader sr = new StreamReader(txtPath);
string result = sr.ReadLine();
string remaining = sr.ReadToEnd();
sr.Close();
StreamWriter sw = new StreamWriter(txtPath, false);
sw.Write(remaining);
sw.Close();
return result;
}
public static void Push(string s)
{
StreamWriter sw = new StreamWriter(txtPath, true);
sw.WriteLine(s);
sw.Close();
}
public static IEnumerable<string> GetTasks()
{
return new List<string>(File.ReadLines(txtPath));
}
}
}
编辑：
这是我改变了但仍然没有去
private void OnChanged(object sender, FileSystemEventArgs e)
{
if (!m_bDirty)
{
m_Sb.Remove(0, m_Sb.Length);
m_Sb.Append(e.FullPath);
m_Sb.Append(" ");
m_Sb.Append(e.ChangeType.ToString());
m_Sb.Append(" ");
m_Sb.Append(DateTime.Now.ToString());
m_bDirty = true;
list = new List<string>(File.ReadAllLines(txtPath));
bindingList = new BindingList<string>(list);
listBox1.DataSource = bindingList;
}
}
这是我的Form.Designer.cs文件
namespace FileChangeNotifier
{
partial class frmNotifier
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.components = new System.ComponentModel.Container();
this.btnWatchFile = new System.Windows.Forms.Button();
this.lstNotification = new System.Windows.Forms.ListBox();
this.label3 = new System.Windows.Forms.Label();
this.tmrEditNotify = new System.Windows.Forms.Timer(this.components);
this.dlgOpenFile = new System.Windows.Forms.OpenFileDialog();
this.dlgOpenDir = new System.Windows.Forms.FolderBrowserDialog();
this.btnLog = new System.Windows.Forms.Button();
this.dlgSaveFile = new System.Windows.Forms.SaveFileDialog();
this.listBox1 = new System.Windows.Forms.ListBox();
this.frmNotifierBindingSource = new System.Windows.Forms.BindingSource(this.components);
((System.ComponentModel.ISupportInitialize)(this.frmNotifierBindingSource)).BeginInit();
this.SuspendLayout();
//
// btnWatchFile
//
this.btnWatchFile.BackColor = System.Drawing.Color.LightSkyBlue;
this.btnWatchFile.FlatStyle = System.Windows.Forms.FlatStyle.Popup;
this.btnWatchFile.ForeColor = System.Drawing.SystemColors.ControlText;
this.btnWatchFile.Location = new System.Drawing.Point(15, 165);
this.btnWatchFile.Margin = new System.Windows.Forms.Padding(4, 4, 4, 4);
this.btnWatchFile.Name = "btnWatchFile";
this.btnWatchFile.Size = new System.Drawing.Size(159, 28);
this.btnWatchFile.TabIndex = 4;
this.btnWatchFile.Text = "Start Watching";
this.btnWatchFile.UseVisualStyleBackColor = false;
this.btnWatchFile.Click += new System.EventHandler(this.btnWatchFile_Click);
//
// lstNotification
//
this.lstNotification.FormattingEnabled = true;
this.lstNotification.ItemHeight = 16;
this.lstNotification.Location = new System.Drawing.Point(15, 228);
this.lstNotification.Margin = new System.Windows.Forms.Padding(4, 4, 4, 4);
this.lstNotification.Name = "lstNotification";
this.lstNotification.Size = new System.Drawing.Size(613, 276);
this.lstNotification.TabIndex = 5;
this.lstNotification.SelectedIndexChanged += new System.EventHandler(this.lstNotification_SelectedIndexChanged);
//
// label3
//
this.label3.AutoSize = true;
this.label3.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.label3.Location = new System.Drawing.Point(15, 208);
this.label3.Margin = new System.Windows.Forms.Padding(4, 0, 4, 0);
this.label3.Name = "label3";
this.label3.Size = new System.Drawing.Size(158, 17);
this.label3.TabIndex = 6;
this.label3.Text = "Change Notifications";
//
// tmrEditNotify
//
this.tmrEditNotify.Enabled = true;
this.tmrEditNotify.Tick += new System.EventHandler(this.tmrEditNotify_Tick);
//
// dlgOpenDir
//
this.dlgOpenDir.RootFolder = System.Environment.SpecialFolder.MyComputer;
//
// btnLog
//
this.btnLog.BackColor = System.Drawing.SystemColors.Highlight;
this.btnLog.FlatStyle = System.Windows.Forms.FlatStyle.Popup;
this.btnLog.Location = new System.Drawing.Point(15, 519);
this.btnLog.Margin = new System.Windows.Forms.Padding(4, 4, 4, 4);
this.btnLog.Name = "btnLog";
this.btnLog.Size = new System.Drawing.Size(159, 28);
this.btnLog.TabIndex = 9;
this.btnLog.Text = "Dump To Log";
this.btnLog.UseVisualStyleBackColor = false;
this.btnLog.Click += new System.EventHandler(this.btnLog_Click);
//
// dlgSaveFile
//
this.dlgSaveFile.DefaultExt = "log";
this.dlgSaveFile.Filter = "LogFiles|*.log";
//
// listBox1
//
this.listBox1.DataSource = this.frmNotifierBindingSource;
this.listBox1.FormattingEnabled = true;
this.listBox1.ItemHeight = 16;
this.listBox1.Location = new System.Drawing.Point(807, 74);
this.listBox1.Margin = new System.Windows.Forms.Padding(4, 4, 4, 4);
this.listBox1.Name = "listBox1";
this.listBox1.Size = new System.Drawing.Size(277, 388);
this.listBox1.TabIndex = 10;
this.listBox1.SelectedIndexChanged += new System.EventHandler(this.listBox1_SelectedIndexChanged);
//
// frmNotifierBindingSource
//
this.frmNotifierBindingSource.DataSource = typeof(FileChangeNotifier.frmNotifier);
//
// frmNotifier
//
this.AutoScaleDimensions = new System.Drawing.SizeF(8F, 16F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(1207, 562);
this.Controls.Add(this.listBox1);
this.Controls.Add(this.btnLog);
this.Controls.Add(this.label3);
this.Controls.Add(this.lstNotification);
this.Controls.Add(this.btnWatchFile);
this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle;
this.Margin = new System.Windows.Forms.Padding(4, 4, 4, 4);
this.MaximizeBox = false;
this.Name = "frmNotifier";
this.Text = "File/Directory Change Notifier";
((System.ComponentModel.ISupportInitialize)(this.frmNotifierBindingSource)).EndInit();
this.ResumeLayout(false);
this.PerformLayout();
}
#endregion
private System.Windows.Forms.Button btnWatchFile;
private System.Windows.Forms.ListBox lstNotification;
private System.Windows.Forms.Label label3;
private System.Windows.Forms.Timer tmrEditNotify;
private System.Windows.Forms.OpenFileDialog dlgOpenFile;
private System.Windows.Forms.FolderBrowserDialog dlgOpenDir;
private System.Windows.Forms.Button btnLog;
private System.Windows.Forms.SaveFileDialog dlgSaveFile;
private System.Windows.Forms.ListBox listBox1;
private System.Windows.Forms.BindingSource frmNotifierBindingSource;
}
}
答案 0 :(得分：0)
您当前的代码未编译。 ReadLine应为ReadAllLines。
并且没有代码可以设置列表框值，因此列表框值不会更改。
尝试使用此代码：
private void OnChanged(object sender, FileSystemEventArgs e)
{
if (!m_bDirty)
{
m_Sb.Remove(0, m_Sb.Length);
m_Sb.Append(e.FullPath);
m_Sb.Append(" ");
m_Sb.Append(e.ChangeType.ToString());
m_Sb.Append(" ");
m_Sb.Append(DateTime.Now.ToString());
m_bDirty = true;
list = new List<string>(File.ReadAllLines(txtPath));
bindingList = new BindingList<string>(list);
listBox1.DataSource = bindingList;
}
}
<强>更新
检查完整的代码后，您觉得这段代码（frmNotifier.cs）错了：
m_bIsWatching = true;
该代码将导致您的FileWatcher事件处理程序未注册。
尝试调试它..