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目錄：引言：

汁粥嗦粽拷貝文件沒有進度條，C#呢，有n種復制文件的方法，如Copy()方法，()方法.

兩種復制的用法： 1. Copy()：

File.Copy(SourcePath, TargetPath, IsOverWrite);

(1) ：要復制的文件路徑 類型：

(2) ：復制后文件存放文件夾 類型：

(3) ：是否覆蓋寫入 類型：bool

2. ()：

File Source = new File(SourcePath);
Source.CopyTo(TargetPath, IsOverWrite);

(1) ：要復制的文件路徑 類型：

(2)：復制后文件存放文件夾 類型：

(3)：是否覆蓋寫入 類型：bool

(4) ：File類的對象 類型：File

但是它們都不能顯示進度條.

對啊，這一搜，沒有一個趁我心的，難道這個就無解了嗎？

當然不.

所以我做了這個教程.

實戰引入：我要做一個復制文件的WPF項目，既追求效率、性能還需要進度條顯示.一、布局

先在你要復制的中（我這里是.xaml），創建

用到的所有控件

序號

類型

名稱

作用

1.

顯示選擇的路徑

2.

打開選擇文件

3.

點擊后復制文件

4.

顯示復制信息

5.

顯示復制進度

6.

打開復制后的文件夾

可以自定義名稱，但是在后面的代碼部分要跟著改.

這里還是貼出我的.xaml

二、主程序 1. 定義變量：

public string FilePath = string.Empty;
public string LocalPath = string.Empty;
private string Creator = Environment.CurrentDirectory + @"\res";
private Thread CopyThread;

注：

(1) ：要復制的文件路徑

(2) ：復制后文件存放文件夾

(3) ：當文件夾不存在時，創建該文件夾所用到的字符串

(4) ：復制線程

2. 選擇文件

private void Select_Click(object sender, RoutedEventArgs e)
{
	OpenFileDialog openFileDialog = new OpenFileDialog();
	openFileDialog.Title = "請選擇要上傳的文件.";
	openFileDialog.Filter = "所有類型的文件|*.*";
	openFileDialog.FileName = string.Empty;
	openFileDialog.FilterIndex = 1;
	openFileDialog.Multiselect = false;
	openFileDialog.RestoreDirectory = false;
	openFileDialog.CheckFileExists= true;
	try
	{
		openFileDialog.ShowDialog();
		FilePath = Path.GetFullPath(openFileDialog.FileName);
		if (!Directory.Exists(Creator)) Directory.CreateDirectory(Creator);
		LocalPath = Environment.CurrentDirectory + @"\res\" + Path.GetFileName(openFileDialog.FileName);
		PathShower.Text = LocalPath;
	}
	catch (ArgumentException)
	{
		MessageBox.Show("請選擇一個文件.");
	}
	catch (Exception)
	{
		MessageBox.Show("請合理輸入文件路徑.");

	}
}

注：

這里主要運用了用于選擇文件（當然文本框也可以）.

3. 復制 (1) 復制信息類

public class CopyFileInfo
{
    public string SourcePath { get; set; }
    public string TargetPath { get; set; }        
}

注：

原理很簡單，就是定義兩個屬性，不多贅述.

(2) 復制文件方法

private void CopyFile(object obj)
{
    CopyFileInfo? c = obj as CopyFileInfo;
    CopyFile(c.SourcePath, c.TargetPath);
}
private void CopyFile(string SourcePath, string TargetPath)
{
    FileInfo F = new FileInfo(SourcePath);
    FileStream FSR = F.OpenRead();
    FileStream FSW = File.Create(TargetPath);
    long FileLength = F.Length;
    byte[] Buffer = new byte[2097152];
    int n = 0;
    while (true)
    {
        DisplayCopyInfo.Dispatcher.BeginInvoke(DispatcherPriority.SystemIdle,
        new Action(UpdateCopyProgress), FileLength, FSR.Position);
        n=FSR.Read(Buffer, 0, 2097152); 
        if (n==0)
        {
            break;
        }
        FSW.Write(Buffer, 0, n);
        FSW.Flush();
	}
    FSR.Close();
    FSW.Close();
}

這里就是一個很基本的復制文件的方法了.

注：

byte[] = new byte[];

這行代碼中的代表每次復制文件的長度，可以改動，但不能太大，會報錯. 這個速度已經很快了拷貝文件沒有進度條，沒有特殊需求默認即可.

(3) 事件觸發

private void CopyBtn_Click(object sender, RoutedEventArgs e)
{
	try
	{
		CopyProgress.Maximum = new FileInfo(FilePath).Length;
		//保存文件信息
		CopyFileInfo copy = new CopyFileInfo() { SourcePath = FilePath, TargetPath = LocalPath };
		//異步調用
		CopyThread = new Thread(new ParameterizedThreadStart(CopyFile));
        //實例化線程
		CopyThread.Start(copy);
        //啟動線程
	}
	catch
	{
		MessageBox.Show("請選擇或輸入文件路徑及名稱！");
	}

}

4. 更新進度條

private void UpdateCopyProgress(long FileLength, long CurrentLength)
{
	DisplayCopyInfo.Text = string.Format("總長度：{0}, 已復制:{1}", FileLength, CurrentLength);          
	CopyProgress.Value = CurrentLength;
}

注：

這里使用了類型的對象的屬性Value.

5. 打開本地文件夾

public static void command(string input)
{
	Process CmdProcess = new Process();
	CmdProcess.StartInfo.FileName = "cmd.exe";
	CmdProcess.StartInfo.CreateNoWindow = true;
	CmdProcess.StartInfo.UseShellExecute = false;
	CmdProcess.StartInfo.RedirectStandardInput = true;
	CmdProcess.StartInfo.RedirectStandardOutput = true;
	CmdProcess.StartInfo.RedirectStandardError = true;
	CmdProcess.StartInfo.Arguments = "/c " + input;
	CmdProcess.Start();
	CmdProcess.WaitForExit();
	CmdProcess.Close();
}
private void OpenDirectory_Click(object sender, RoutedEventArgs e)
{
	if (!Directory.Exists(Creator)) Directory.CreateDirectory(Creator);
	command("explorer \"" + Environment.CurrentDirectory + "\\res\"");
}

注：

這里使用了類來達到打開文件夾的效果.

6. 關閉窗口確認

private void MainWindow_Closing(object sender, CancelEventArgs e)
{
	MessageBoxResult result = MessageBox.Show("是否退出？", "退出確認", MessageBoxButton.OKCancel, MessageBoxImage.Question);
	if (result == MessageBoxResult.Cancel)
	{
		e.Cancel = true;
	}
	else
	{
		Environment.Exit(0);
	}
}

注：

需要在xaml里添加關閉事件：="".

三、完整代碼

using Microsoft.Win32;
using System;
using System.ComponentModel;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Threading;
namespace Advanced_Copy
{
	public partial class MainWindow : Window
	{

		public string FilePath = string.Empty;
		public string LocalPath = string.Empty;
		private string Creator = Environment.CurrentDirectory + @"\res";
		private Thread CopyThread;
		public MainWindow()
		{
			InitializeComponent();
		}
		private void CopyBtn_Click(object sender, RoutedEventArgs e)
		{
			try
			{
				CopyProgress.Maximum = new FileInfo(FilePath).Length;
				CopyFileInfo copy = new CopyFileInfo() { SourcePath = FilePath, TargetPath = LocalPath };
				CopyThread = new Thread(new ParameterizedThreadStart(CopyFile));
				CopyThread.Start(copy);
			}
			catch
			{
				MessageBox.Show("請選擇或輸入文件路徑及名稱！");
			}
		}
		private void Select_Click(object sender, RoutedEventArgs e)
		{
			OpenFileDialog openFileDialog = new OpenFileDialog();
			openFileDialog.Title = "請選擇要上傳的文件.";
			openFileDialog.Filter = "所有類型的文件|*.*";
			openFileDialog.FileName = string.Empty;
			openFileDialog.FilterIndex = 1;
			openFileDialog.Multiselect = false;
			openFileDialog.RestoreDirectory = false;
			openFileDialog.CheckFileExists= true;
			try
			{
				openFileDialog.ShowDialog();
				FilePath = Path.GetFullPath(openFileDialog.FileName);
				if (!Directory.Exists(Creator)) Directory.CreateDirectory(Creator);
				LocalPath = Environment.CurrentDirectory + @"\res\" + Path.GetFileName(openFileDialog.FileName);
				PathShower.Text = LocalPath;
			}
			catch (ArgumentException)
			{
				MessageBox.Show("請選擇一個文件.");
			}
			catch (Exception)
			{
				MessageBox.Show("請合理輸入文件路徑.");
			}
		}
		private void CopyFile(object obj)
	    {
	        CopyFileInfo? c = obj as CopyFileInfo;
	        CopyFile(c.SourcePath, c.TargetPath);
	    }
		private void CopyFile(string SourcePath, string TargetPath)
        {
            FileInfo F = new FileInfo(SourcePath);
            FileStream FSR = F.OpenRead();

            FileStream FSW = File.Create(TargetPath);
            long FileLength = F.Length;
            byte[] Buffer = new byte[2097152];
            int n = 0;
            
            while (true)
            {
                DisplayCopyInfo.Dispatcher.BeginInvoke(DispatcherPriority.SystemIdle,
                new Action(UpdateCopyProgress), FileLength, FSR.Position);
                
                n=FSR.Read(Buffer, 0, 2097152); 
                if (n==0)
                {
                    break;
                }
                FSW.Write(Buffer, 0, n);
                FSW.Flush();
			}
            FSR.Close();
            FSW.Close();
        }
		private void UpdateCopyProgress(long FileLength, long CurrentLength)
		{
			DisplayCopyInfo.Text = string.Format("總長度：{0}, 已復制:{1}", FileLength, CurrentLength);
			CopyProgress.Value = CurrentLength;
		}
		private void OpenDirectory_Click(object sender, RoutedEventArgs e)
		{
			if (!Directory.Exists(Creator)) Directory.CreateDirectory(Creator);
			Command.command("explorer \"" + Environment.CurrentDirectory + "\\res\"");
		}
		private void MainWindow_Closing(object sender, CancelEventArgs e)
		{
			MessageBoxResult result = MessageBox.Show("是否退出？", "退出確認", MessageBoxButton.OKCancel, MessageBoxImage.Question);
			if (result == MessageBoxResult.Cancel)
			{
				e.Cancel = true;
			}
			else
			{
				Environment.Exit(0);
			}
		}
	}
	public class CopyFileInfo
	{
	        public string SourcePath { get; set; }
	        public string TargetPath { get; set; }        
	}
}

四、效果圖

教程到此結束，感謝參考！

Made By On 2022.12.15