Question

namespace Backup

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
    }

    private void btn_Backup_Click(object sender, EventArgs e)
    {
        List<DirectoryInfo> SourceDir = this.lbox_Sources.Items.Cast<DirectoryInfo>().ToList();
        string TargetDir = this.tbox_Target.Text;

        foreach (DirectoryInfo directory in SourceDir)
        {
            foreach (var file in directory.GetFiles())
                File.Copy(file.Name, Path.Combine(TargetDir, file.Name), true);
        }
    }

当我尝试备份时，会抛出异常，但该文件存在且可访问。编程不是那么好，所以可能有一些愚蠢的错误：P

Answer 1

好像你需要修改File.Copy行：

var targetPath = Path.Combine(TargetDir, file.Name)
File.Copy(file.FullName, targetPath , true);

我将第一个参数从file.Name更改为file.FullName - 这应该可以修复异常

Answer 2

用File.Copy中的file.FullName替换file.Name

foreach (var file in directory.GetFiles())
                File.Copy(file.FullName, Path.Combine(TargetDir, file.Name), true);

FileNotFoundException但文件存在C＃

2 个答案: