Backup/updateFileNamePro/Form1.cs

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namespace updateFileNamePro
{
    using System;
    using System.ComponentModel;
    using System.Drawing;
    using System.IO;
    using System.Windows.Forms;

    public class Form1 : Form
    {
        private Button btnOpen;
        private Button btnStart;
        private IContainer components = null;
        private FolderBrowserDialog folderBrowserDialog1;
        private Label label1;
        private Label label2;
        private Label label3;
        private LinkLabel linkLabel1;
        private TextBox txtFolderPath;
        private TextBox txtNewZfc;
        private TextBox txtReplaceZfc;

        public Form1()
        {
            this.InitializeComponent();
        }

        private void btnOpen_Click(object sender, EventArgs e)
        {
            this.folderBrowserDialog1.ShowDialog();
            this.txtFolderPath.Text = this.folderBrowserDialog1.SelectedPath;
        }

        private void btnStart_Click(object sender, EventArgs e)
        {
            string str = this.txtFolderPath.Text.Trim();
            if (string.IsNullOrEmpty(str))
            {
                MessageBox.Show("请选择文件夹！");
            }
            else if (!Directory.Exists(str))
            {
                MessageBox.Show("文件夹不存在，请重新选择！");
                this.txtFolderPath.Text = string.Empty;
            }
            else
            {
                try
                {
                    string str2 = this.txtReplaceZfc.Text.Trim();
                    string[] files = Directory.GetFiles(str);
                    if ((files == null) || (files.Length == 0))
                    {
                        MessageBox.Show("当前文件夹中不存在要修改的文件！");
                    }
                    else
                    {
                        string newValue = this.txtNewZfc.Text.Trim();
                        foreach (string str4 in files)
                        {