尝试在ComboBox.Items.AddRange()中显示文件名

using System;
using System.IO;
using System.Windows.Forms;

public class FileComboBoxForm : Form
{
    private ComboBox fileComboBox;

    public FileComboBoxForm()
    {
        InitializeComponents();
        PopulateComboBox();
    }

    private void InitializeComponents()
    {
        fileComboBox = new ComboBox();
        fileComboBox.Dock = DockStyle.Fill;
        Controls.Add(fileComboBox);
    }

    private void PopulateComboBox()
    {
        // 指定要显示文件名的目录
        string directoryPath = "C:\\MyFiles";
        
        // 获取文件列表
        string[] files = Directory.GetFiles(directoryPath);
        
        // 提取文件名并添加到ComboBox的项中
        foreach (string filePath in files)
        {
            string fileName = Path.GetFileName(filePath);
            fileComboBox.Items.Add(fileName);
        }
    }
}