winforms中的C＃listview不显示添加的项目

Question

I am trying to select a directory from an open file dialog in C# but when I actually add the items to the List View, it is not being displayed. THis is my code so far... am I missing something?

private void btnChoose_Click(object sender, EventArgs e)
    {
        try
        {
            FolderBrowserDialog folderPicker = new FolderBrowserDialog();
            listLeft.View = View.Details;
            if (folderPicker.ShowDialog() == DialogResult.OK)
            {
                DirectoryInfo di = new DirectoryInfo(folderPicker.SelectedPath);
                FileInfo[] files = di.GetFiles();
                DirectoryInfo[] directories = di.GetDirectories();

                foreach (DirectoryInfo directory in directories)
                {
                    listLeft.Items.Add("Directory " + directory.Name);
                }
                foreach (FileInfo file in files)
                {
                    listLeft.Items.Add(file.Name);
                }
            }
        }
        catch (Exception ex)
        {
            MessageBox.Show("An error occurred: " + ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
        }
    }

EDIT::: Added this screenshot with descriptions...

Answer 1

I'm assuming that listLeft is your ListView. You need to add subitems like this:

            foreach (DirectoryInfo directory in directories)
            {
                ListViewItem lvi = new ListViewItem();
                lvi.SubItems.Add("Directory " + directory.Name);
                listLeft.Items.Add(lvi);
            }
            foreach (FileInfo file in files)
            {
                ListViewItem lvi = new ListViewItem();
                lvi.SubItems.Add(file.Name);
                listLeft.Items.Add(lvi);
            }

EDIT: Try this:

private void button1_Click(object sender, EventArgs e)
{
    try
    {
        listLeft.Columns.Add(new ColumnHeader());
        FolderBrowserDialog folderPicker = new FolderBrowserDialog();
        listLeft.View = View.Details;
        if (folderPicker.ShowDialog() == DialogResult.OK)
        {
            DirectoryInfo di = new DirectoryInfo(folderPicker.SelectedPath);
            FileInfo[] files = di.GetFiles();
            DirectoryInfo[] directories = di.GetDirectories();

            foreach (DirectoryInfo directory in directories)
            {
                listLeft.Items.Add("Directory " + directory.Name);
            }
            foreach (FileInfo file in files)
            {
                listLeft.Items.Add(file.Name);
            }
        }
    }
    catch (Exception ex)
    {
        MessageBox.Show("An error occurred: " + ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
    }
}

Answer 2

It should be adding to the listbox - if there are objects in the directories and files objects... try setting a breakpoint in each method and seeing what happens. If the breakpoints aren't triggered then something is wrong with your Get() methods...

Answer 3

your question states 'listview in winforms'.

But a System.Windows.Forms.ListBox does not have View property, so your line of code

listLeft.View = View.Details;

does not compile when I try to reproduce.

Are you perhaps referring to a WPF listbox instead? In that case, can you show us more code, in particular your data binding?