C# 如何使用按钮c在列表框中显示重复项#

我在互联网上找不到这类问题的答案，所以我想我不妨问问自己。我需要能够按下一个按钮，然后将运行一个功能，搜索选定的文件目录和所有的子文件夹后，看看是否有相同的文件有两次。我将把所有必要的代码放在下面：

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();
}

编辑： `私有void GetDuplicates（） { DirectoryInfo directoryToCheck=新的DirectoryInfo（@“C:\temp\Location Source”）

像这样

编辑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");
    }

---

如果有人能帮忙，那就太好了。谢谢！

根据评论，如果有重复项，您将显示“无重复项””消息。如果有重复项，请反转您的

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

if（duplicates.Count（）类似以下内容：

  // 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");
  } 

您在发布代码时遇到的问题是什么？当我单击按钮时，消息框会弹出“无重复项”，而我正在测试的内容却有重复项。因为您在if块上显示消息，它应该在else块上。if（duplicates.Count（）>0）应该是if（！duplicates.Any（））我更改了它，现在在列表框中显示了这个“System.Linq.Enumerable迭代器`2[System.Linq}…@Robert Vassitha:很抱歉输入错误：它应该是
chunk.Count（）
而不是
chunk.Count
和
AddRange（duplicates.ToArray（））
而不是
AddRange（duplicates）
；我已经编辑了答案什么见鬼！它真的起作用了？！我有点惊讶和困惑，因为我已经有了.Toarray（）和.count（从以前的0开始，当我再次尝试时，它起作用了吗？我想它可能是缩进，但visual studio会告诉我，如果是这样的话。无论如何，谢谢！
  // 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");
  }