Databases
StackOverflow2013
Postsdbo
POCannot fill my list if i move it to new Thread
Body
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POCannot fill my list if i move it to new Thread
    text
    copied!<p>I am use <code>SafeFileEnumerator</code> class to search for files inside folder root, this class return only files from location with permission so I am use it successfully.</p> <p>When I try to fill my list in this way all works fine:</p> <pre><code> List&lt;string&gt; list = new List&lt;string&gt;(); list = SafeFileEnumerator.EnumerateFiles(folderBrowserDialog1.SelectedPath, "*.*", SearchOption.AllDirectories).ToList(); </code></pre> <p>But in this case my GUI freeze so I move it to new thread and in this case nothing happen and I wondered why:</p> <pre><code>private void btnAddDir_Click(object sender, EventArgs e) { List&lt;string&gt; list = new List&lt;string&gt;(); string fileToAdd = string.Empty; List&lt;string&gt; filesList = new List&lt;string&gt;(); dialog = folderBrowserDialog1.ShowDialog(); tbAddDir.Text = folderBrowserDialog1.SelectedPath; string pathToSearch = folderBrowserDialog1.SelectedPath; if (dialog == DialogResult.OK) { toolStripStatusLabel.Text = "Search for pcap files..."; groupBoxRootDirectory.Enabled = false; btnStart.Enabled = false; ThreadStart starter = delegate { list = SafeFileEnumerator.EnumerateFiles(pathToSearch, "*.pcap", SearchOption.AllDirectories).ToList(); }; Thread t = new Thread(starter); t.IsBackground = true; t.Start(); if(list.Count != 0) AddFilesToListBox(list); } } </code></pre> <p><strong>SafeFileEnumerator class code:</strong></p> <pre><code>public static class SafeFileEnumerator { public static IEnumerable&lt;string&gt; EnumerateDirectories(string parentDirectory, string searchPattern, SearchOption searchOpt) { try { var directories = Enumerable.Empty&lt;string&gt;(); if (searchOpt == SearchOption.AllDirectories) { directories = Directory.EnumerateDirectories(parentDirectory).SelectMany(x =&gt; EnumerateDirectories(x, searchPattern, searchOpt)); } return directories.Concat(Directory.EnumerateDirectories(parentDirectory, searchPattern)); } catch (UnauthorizedAccessException ex) { return Enumerable.Empty&lt;string&gt;(); } } public static IEnumerable&lt;string&gt; EnumerateFiles(string path, string searchPattern, SearchOption searchOpt) { try { var dirFiles = Enumerable.Empty&lt;string&gt;(); if (searchOpt == SearchOption.AllDirectories) { dirFiles = Directory.EnumerateDirectories(path).SelectMany(x =&gt; EnumerateFiles(x, searchPattern, searchOpt)); } return dirFiles.Concat(Directory.EnumerateFiles(path, searchPattern)); } catch (UnauthorizedAccessException ex) { return Enumerable.Empty&lt;string&gt;(); } } } </code></pre> <p>after my list is full of files:</p> <pre><code>private void AddFilesToListBox(List&lt;string&gt; filesList) { string fileToAdd = string.Empty; Editcap editcap = new Editcap(); Capinfos capinfos = new Capinfos(); BackgroundWorker backgroundWorker = new BackgroundWorker(); backgroundWorker.WorkerReportsProgress = true; backgroundWorker.DoWork += (s1, e1) =&gt; { foreach (string fileName in filesList) { FileInfo fileInfo = new FileInfo(fileName); if (checkFileCreationDate(fileInfo)) { if (editcap.isWiresharkFormat(fileInfo.FullName)) { if (editcap.isLibpcapFormat(fileInfo.FullName)) { addFileToListBox(fileInfo.FullName, capinfos.getFileDuration(fileInfo.FullName)); } else if (!editcap.isLibpcapFormat(fileInfo.FullName)) { fileToAdd = editcap.getNewFileName(fileInfo.FullName); if (new FileInfo(fileToAdd).Exists &amp;&amp; !fileInfo.Exists) { addFileToListBox(fileToAdd, capinfos.getFileDuration(fileInfo.FullName)); } } } } //this.Invoke((MethodInvoker)delegate { lvFiles.Items[lvFiles.Items.Count - 1].Selected = true; }); toolStripStatusLabel.Text = string.Format("{0} files were added", lvFiles.Items.Count); } //this.Invoke((MethodInvoker)delegate { lvFiles.Items[lvFiles.Items.Count - 1].Selected = true; }); }; backgroundWorker.RunWorkerCompleted += new RunWorkerCompletedEventHandler( (s1, e1) =&gt; { groupBoxRootDirectory.Enabled = true; btnClear.Enabled = true; if (lvFiles.Items.Count != 0) btnStart.Enabled = true; toolStripStatusLabel.Text = string.Format("{0} files were added", lvFiles.Items.Count); if (tbAddDir.Text != "") { listener = new FileListener(); listener.startListener(tbAddDir.Text); listener._newFileEventHandler += listener_newFileEventHandler; } }); backgroundWorker.RunWorkerAsync(); } </code></pre>
 

Querying!

 
Guidance
An individual column

Larger individual text columns get their own page to allow for proper reading.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload