我正在尝试使Windows窗体应用程序执行与控制台应用程序相同的操作。设计只是一个带有两个标签的盒子（稍后将尝试添加进度条），但是由于某种原因，代码无法正常工作。
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Diagnostics;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Windows.Forms;
namespace WindowsFormsApp1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void label1_Click(object sender, EventArgs e)
{
}
private void Form1_Load(object sender, EventArgs e)
{
string date = DateTime.Now.ToString("ddMMyy");
string Source = @"G:\Personal\A1";
string Destination = @"D:\_Lil USB Backup\" + "b";
if (System.IO.Directory.Exists(Source))
{
if (System.IO.Directory.Exists(Destination))
{
infoBox.Text = "Backup already exists for today. U rem";
}
else
{
System.IO.Directory.CreateDirectory(Destination);
}
try
{
CopyAllFiles(Source, Destination);
infoBox.Text = "Files backed up successfully.";
if (System.IO.Directory.Exists(@"D:\" + date + @"System Volume Information"))
{
Directory.Delete(@"D:\" + date + @"System Volume Information", true);
infoBox.Text = "Files backed up successfully.\n System Volume Information folder deleted.\n Backup successfull.";
}
else
{
infoBox.Text = "System Volume Information folder does not exist and therefore was not deleted.\n Backup successfull.";
}
}
catch (Exception ez)
{
infoBox.Text = "Umm, something didn't work. Oh maybe it was this? " + ez.Message;
}
}
else
{
infoBox.Text = "Source does not exist, try plugging the USB in dipshit.";
}
}
private static void CopyAllFiles(string Source, string Destination)
{
try
{
// Get the subdirectories for the specified directory.
DirectoryInfo dir = new DirectoryInfo(Source);
DirectoryInfo[] dirs = dir.GetDirectories();
if (!dir.Exists)
{
Label infoBoxErr = new Label();
infoBoxErr.Text = "Directory could not be found.";
}
// If the destination directory doesn't exist, create it.
if (!Directory.Exists(Destination))
{
Directory.CreateDirectory(Destination);
}
// Get the files in the directory and copy them to the new location.
FileInfo[] files = dir.GetFiles();
foreach (FileInfo file in files)
{
string temppath = Path.Combine(Destination, file.Name);
file.CopyTo(temppath, true);
}
foreach (DirectoryInfo subdir in dirs)
{
string temppath = Path.Combine(Destination, subdir.Name);
CopyAllFiles(subdir.FullName, temppath);
}
}
catch (Exception ex)
{
Label infoBoxErr = new Label();
infoBoxErr.Text = "Oh. Something didn't work, sorry. Might have been this: " + ex.Message + " lol!";
}
}
private void progressBar1_Click(object sender, EventArgs e)
{
}
}
}
问题在于，它会像预期的那样成功输出标签中的文本。但是，它不会创建新文件夹或复制任何文件。我不知道为什么，而且没有给我任何错误！
答案 0 :(得分：0)
首先，您在 CopyAllFiles 方法中捕获了异常。及其代码
catch (Exception ex)
{
Label infoBoxErr = new Label();
infoBoxErr.Text = "Oh. Something didn't work, sorry. Might have been this: " + ex.Message + " lol!";
}
不执行任何操作，因为它在内存中创建了标签 infoBoxErr ，并且根本不显示它。
因此，以下代码
try
{
CopyAllFiles(Source, Destination);
infoBox.Text = "Files backed up successfully.";
if (System.IO.Directory.Exists(@"D:\" + date + @"System Volume Information"))
{
Directory.Delete(@"D:\" + date + @"System Volume Information", true);
infoBox.Text = "Files backed up successfully.\n System Volume Information folder deleted.\n Backup successfull.";
}
else
{
infoBox.Text = "System Volume Information folder does not exist and therefore was not deleted.\n Backup successfull.";
}
}
catch (Exception ez)
{
infoBox.Text = "Umm, something didn't work. Oh maybe it was this? " + ez.Message;
}
永远不会到达 catch 块（由于 CopyAllFiles 方法中的内部捕获），只会显示成功文本。
所以我建议您删除该内部陷阱，然后看看会发生什么。