分享：基于WPF实现批量文件查找复制并保存到指定位置，详细步骤

xml复制<Window x:Class="FileBatchCopy.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        mc:Ignorable="d"
        Title="批量文件查找复制工具" Height="500" Width="700">
    <Grid Margin="10">
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="*"/>
            <RowDefinition Height="Auto"/>
        </Grid.RowDefinitions>
        
        <!-- 源目录 -->
        <StackPanel Orientation="Horizontal" Grid.Row="0">
            <Label Content="源目录:" Width="60"/>
            <TextBox x:Name="txtSourceDir" Width="400"/>
            <Button Content="浏览" Click="BrowseSourceDir_Click" Margin="10,0,0,0"/>
        </StackPanel>
        
        <!-- 文件扩展名 -->
        <StackPanel Orientation="Horizontal" Grid.Row="1">
            <Label Content="文件扩展名:" Width="80"/>
            <TextBox x:Name="txtFileExt" Width="200"/>
            <TextBlock Text=".扩展名（如txt）" Foreground="Gray" VerticalAlignment="Center"/>
        </StackPanel>
        
        <!-- 目标目录 -->
        <StackPanel Orientation="Horizontal" Grid.Row="2">
            <Label Content="目标目录:" Width="60"/>
            <TextBox x:Name="txtTargetDir" Width="400"/>
            <Button Content="浏览" Click="BrowseTargetDir_Click" Margin="10,0,0,0"/>
        </StackPanel>
        
        <!-- 日志显示 -->
        <TextBox x:Name="txtLog" Grid.Row="3" Height="150" IsReadOnly="True" VerticalScrollBarVisibility="Auto" Margin="0,10,0,0"/>
        
        <!-- 开始按钮 -->
        <Button Content="开始复制" Width="100" HorizontalAlignment="Right" Margin="0,10,10,0" Grid.Row="4" Click="StartCopy_Click"/>
    </Grid>
</Window>

csharp复制using System;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Windows;

namespace FileBatchCopy
{
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        // 浏览源目录
        private void BrowseSourceDir_Click(object sender, RoutedEventArgs e)
        {
            using (var dialog = new System.Windows.Forms.FolderBrowserDialog())
            {
                dialog.Description = "请选择源目录";
                dialog.ShowNewFolderButton = false;
                var result = dialog.ShowDialog();
                if (result == System.Windows.Forms.DialogResult.OK)
                {
                    txtSourceDir.Text = dialog.SelectedPath;
                }
            }
        }

        // 浏览目标目录
        private void BrowseTargetDir_Click(object sender, RoutedEventArgs e)
        {
            using (var dialog = new System.Windows.Forms.FolderBrowserDialog())
            {
                dialog.Description = "请选择目标目录";
                dialog.ShowNewFolderButton = true;
                var result = dialog.ShowDialog();
                if (result == System.Windows.Forms.DialogResult.OK)
                {
                    txtTargetDir.Text = dialog.SelectedPath;
                }
            }
        }

        // 开始复制
        private async void StartCopy_Click(object sender, RoutedEventArgs e)
        {
            string sourceDir = txtSourceDir.Text.Trim();
            string targetDir = txtTargetDir.Text.Trim();
            string fileExt = txtFileExt.Text.Trim();

            if (string.IsNullOrEmpty(sourceDir))
            {
                MessageBox.Show("请先选择源目录！", "错误", MessageBoxButton.OK, MessageBoxImage.Error);
                return;
            }

            if (string.IsNullOrEmpty(targetDir))
            {
                MessageBox.Show("请先选择目标目录！", "错误", MessageBoxButton.OK, MessageBoxImage.Error);
                return;
            }

            if (string.IsNullOrEmpty(fileExt) || !fileExt.StartsWith("."))
            {
                MessageBox.Show("请输入有效的文件扩展名（如 .txt）！", "错误", MessageBoxButton.OK, MessageBoxImage.Error);
                return;
            }

            txtLog.Clear();
            btnStartCopy.IsEnabled = false;
            progressBar.Visibility = Visibility.Visible;

            try
            {
                var files = Directory.GetFiles(sourceDir, $"*{fileExt}", SearchOption.AllDirectories);
                int total = files.Length;
                int copied = 0;

                foreach (var file in files)
                {
                    try
                    {
                        string fileName = Path.GetFileName(file);
                        string destFile = Path.Combine(targetDir, fileName);

                        // 如果目标文件已存在，可以选择跳过或覆盖
                        if (File.Exists(destFile))
                        {
                            // 这里选择跳过
                            Log($"文件已存在，跳过: {fileName}");
                            continue;
                        }

                        // 创建目标文件夹（如果不存在）
                        string destFolder = Path.GetDirectoryName(destFile);
                        Directory.CreateDirectory(destFolder);

                        // 复制文件
                        File.Copy(file, destFile, overwrite: false);
                        Log($"已复制: {fileName}");
                        copied++;
                    }
                    catch (Exception ex)
                    {
                        Log($"复制失败: {Path.GetFileName(file)} - {ex.Message}");
                    }

                    // 更新进度
                    double progress = (double)copied / total * 100;
                    progressBar.Value = progress;
                    await Task.Delay(10); // 界面响应更流畅
                }

                Log($"操作完成！共复制了 {copied} 个文件。");
            }
            catch (Exception ex)
            {
                Log($"发生错误: {ex.Message}");
            }
            finally
            {
                btnStartCopy.IsEnabled = true;
                progressBar.Visibility = Visibility.Collapsed;
            }
        }

        // 记录日志
        private void Log(string message)
        {
            Dispatcher.Invoke(() =>
            {
                txtLog.AppendText($"{DateTime.Now}: {message}\n");
            });
        }
    }
}