C#对文件进行批量重命名或者对某单个文件进行改名的示例代码

using System;
using System.IO;
using System.Collections.Generic;
using System.Linq;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
 
namespace 对文件进行重命名
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private void xuanze_click(object sender, EventArgs e)
        {
            FolderBrowserDialog dilog = new FolderBrowserDialog();
            string str = @"F:";
            dilog.Description = "请选择文件夹";
                       
            if (dilog.ShowDialog() == DialogResult.OK)
            {                
                textBox1.Text = dilog.SelectedPath;
            }
        }
 
        private void shang_click(object sender, EventArgs e)
        {
            if(textBox1.Text=="")
            {
                MessageBox.Show("路径不能为空");
            }
            else
            {
                string path = textBox1.Text;
                DirectoryInfo root = new DirectoryInfo(path);
                FileInfo[] files = root.GetFiles();
                List<FileInfo> listFiles = files.ToList();                
 
                for (int i = 0; i < listFiles.Count; i++)
                {
                    //textBox2.AppendText(listFiles[i].FullName);
                    //textBox2.AppendText("\r\n");
                    //textBox2.AppendText(Environment.NewLine);
                    textBox2.AppendText(listFiles[i].Name);
                    textBox2.AppendText("\r\n");
                }
 
            }
        }
 
        private void xiu_click(object sender, EventArgs e)
        {
            if (textBox3.Text == "")
            {
                MessageBox.Show("修改内容不能为空");
            }
            else
            {
                string path = textBox1.Text;
                DirectoryInfo root = new DirectoryInfo(path);
                FileInfo[] files = root.GetFiles();
                List<FileInfo> listFiles = files.ToList();
                for (int i = 0; i < listFiles.Count; i++)
                {
                    string srcFileName = listFiles[i].FullName;
                    string destFileName = listFiles[i].Directory.FullName + "\\" + textBox3.Text + string.Format("（{0}）", i + 1) + listFiles[i].Extension;
                    File.Move(srcFileName, destFileName);
                }                
                MessageBox.Show("已经完成了");
                textBox2.Text = "";
                OpenFileDialog Openfile = new OpenFileDialog();
                Openfile.InitialDirectory = path;
                Openfile.ShowDialog();
            }
        }
 
        private void xz1_click(object sender, EventArgs e)
        {
            OpenFileDialog Openfile = new OpenFileDialog();
            string str = @"F:";
            Openfile.InitialDirectory = str;
            Openfile.Title = "请选择文件路径";
            if (Openfile.ShowDialog() == DialogResult.OK)
            {
                textBox4.Text = Openfile.FileName;
            }
        }
 
        private void button3_Click(object sender, EventArgs e)
        {
            if (textBox3.Text == "")
            {
                MessageBox.Show("修改内容不能为空");
            }
            else
            {
                string path = textBox4.Text;
                string srcFileName = path;
                string destFileName = Path.GetDirectoryName(path) + "\\" + textBox3.Text + Path.GetExtension(path);
                File.Move(srcFileName, destFileName);                
                textBox4.Text = "";
                textBox3.Text = "";
                MessageBox.Show("已经完成了");
            }
        }           
 
        private string aa()
        {
            OpenFileDialog Openfile = new OpenFileDialog();
            string str = @"F:";
            
            Openfile.InitialDirectory = str;
            Openfile.Title = "请选择文件路径";
            if (Openfile.ShowDialog() == DialogResult.OK)
            {
               return Openfile.FileName;
            }
            else
            {
                return "";
            }
        }
 
        private void textBox4_TextChanged(object sender, EventArgs e)
        {
 
        }
    }
}