winforms 中的 C# listview 不显示添加的项目

Question

我试图从 C# 中的打开文件对话框中选择一个目录，但是当我实际将项目添加到 ListView 时，它没有显示。到目前为止，这是我的代码……我是否遗漏了什么？

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);
        }
    }

编辑::: 添加了带有说明的屏幕截图...

Answer 1

我假设 listLeft 是您的 ListView。您需要像这样添加子项:

            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);
            }

编辑:试试这个:

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);
    }
}