Wie kann ich die Duplikate in einer Listbox mit einem Knopf anzeigen C#

Question

Ich kann keine Antwort auf diese Art von Problem irgendwo im Internet finden, so dass ich dachte, ich könnte mich auch fragen. Ich muss in der Lage sein, eine Taste zu drücken, die dann eine Funktion ausführt, die das ausgewählte Dateiverzeichnis und alle Unterordner danach durchsucht, um zu sehen, ob dieselbe Datei zweimal vorhanden ist. Ich werde im Folgenden alle notwendigen Code setzen:

public partial class fileForm : Form 
{ 
     private string _filelistlocation; 
     private string _fileDest; 
     private string _fileSource; 

     public fileForm() 
     { 
      InitializeComponent(); 
     } 


public void fileForm_Load(object sender, System.EventArgs e) 
{ 
      _filelistlocation = textBox1.Text; 
      _fileDest = labelDestRoot.Text; 
      _fileSource = labelSourceRoot.Text; 
} 

private void button1_Click(object sender, System.EventArgs e) 
{ 
      checkedListBox1.Items.Clear(); 
      listBox2.Items.Clear(); 
      ReadFromList(); 
} 

private void GetDuplicates() 
{ 
      DirectoryInfo directoryToCheck = new DirectoryInfo(@"C:\temp\Location Source");` 

      FileInfo[] files = directoryToCheck.GetFiles("*.*", SearchOption.AllDirectories); 
      var duplicates = files.GroupBy(x => x.Name) 
            .Where(group => group.Count() > 1) 
            .Select(group => group.Key);//display duplicates 
      if (duplicates.Count() > 0) 
      { 
       MessageBox.Show("No Dupes"); 
       FileStream s2 = new FileStream(_filelistlocation, FileMode.Open, FileAccess.Read, FileShare.Read); 
      } 
      else 
       listBox1.Items.Add(duplicates);` 
     } 

private void button5_Click_1(object sender, EventArgs e) 
{ 
      GetDuplicates(); 
} 

EDIT: `private void GetDuplicates() { Directory directoryToCheck = new Directory (@ "C: \ temp \ Location Source");

 FileInfo[] files = directoryToCheck.GetFiles("*.*", SearchOption.AllDirectories); 
     var duplicates = files.GroupBy(x => x.Name) 
           .Where(group => group.Count() > 1) 
           .Select(group => group.Key);//display duplicates 
     if (!duplicates.Any()) 
     { 
      listBox1.Items.Add(duplicates); 

      FileStream s2 = new FileStream(_filelistlocation, FileMode.Open, FileAccess.Read, FileShare.Read); 



     } 
     else 
      MessageBox.Show("No Dupes"); 
    }` 

so?

EDIT 2:

private void GetDuplicates() 
    { 
     DirectoryInfo directoryToCheck = new DirectoryInfo(@"C:\temp\Location Source"); 

     FileInfo[] files = directoryToCheck.GetFiles("*.*", SearchOption.AllDirectories); 
     var duplicates = files.GroupBy(x => x.Name) 
           .Where(group => group.Count() > 1) 
           .Select(group => group.Key);//display duplicates 
     if (!duplicates.Any()) 
     { 
      listBox1.Items.Add(duplicates.ToArray()); 

      FileStream s2 = new FileStream(_filelistlocation, FileMode.Open, FileAccess.Read, FileShare.Read); 



     } 
     else 
      MessageBox.Show("No Dupes"); 
    } 

Wenn jemand das wäre schön helfen könnte. Vielen Dank!

Answer 1

Etwas wie folgt aus:

// Fluent: given directory name obtain duplicates with no temporarys 
    var duplicates = Directory 
    .EnumerateFiles(@"C:\temp\Location Source", "*.*", SearchOption.AllDirectories) 
    .GroupBy(file => Path.GetFileName(file)) 
    .Where(chunk => chunk.Count() > 1) 
    .Select(chunk => chunk.Key); 

    // Straightforward: are there ANY duplicates? 
    if (duplicates.Any()) { 
    // Please note "AddRange" (you have many items to add) 
    listBox1.Items.AddRange(duplicates.ToArray()); 

    //TODO: may be it should be put into "else" (no dups) 
    // Looks that you've forgot to wrap IDisposable into using... 
    using (FileStream s2 = new FileStream(_filelistlocation, 
     FileMode.Open, 
     FileAccess.Read, 
     FileShare.Read)) { 
     ... 
    } 
    } 
    else { 
    MessageBox.Show("No Dupes"); 
    } 

Answer 2

Anhand von Kommentaren wird die Meldung "No dupes" angezeigt, wenn Dubletten vorhanden sind. Invert Ihre if statment

if (duplicates.Count() <= 0) 
{ 
    MessageBox.Show("No Dupes"); 
    FileStream s2 = new FileStream(_filelistlocation, FileMode.Open, FileAccess.Read, FileShare.Read); 
} 
else 
{ 
    listBox1.Items.AddRange(duplicates); 
}