C# 异常：当用户输入C:\Name时，不支持给定的路径格式

我制作了一个小型控制台应用程序，帮助用户将所有内容从一个目录复制到另一个目录。代码如下：

using System;
using System.IO;
namespace CopyEdriveContentToLocalFolder
{
    class Program
    {
        public static void Copy(string sourceDirectory, string targetDirectory)
        {
            DirectoryInfo diSource = new DirectoryInfo(sourceDirectory);
            DirectoryInfo diTarget = new DirectoryInfo(targetDirectory);

            CopyAll(diSource, diTarget);
        }
        public static void CopyAll(DirectoryInfo source, DirectoryInfo target)
        {
            Directory.CreateDirectory(target.FullName);

            // Copy each file into the new directory.

            foreach (FileInfo fi in source.GetFiles())
            {
                Console.WriteLine(@"Copying {0}\{1}", target.FullName, fi.Name);
                fi.CopyTo(Path.Combine(target.FullName, fi.Name), true);
            }


            // Copy each subdirectory using recursion.

            foreach (DirectoryInfo diSourceSubDir in source.GetDirectories())
            {

                DirectoryInfo nextTargetSubDir =
                    target.CreateSubdirectory(diSourceSubDir.Name);
                CopyAll(diSourceSubDir, nextTargetSubDir);
            }
        }
        static void Main(string[] args)
        {

            // Specify a name for your Parent folder.
            string ParentFolderName;
            string ChildFolderName;
            Console.WriteLine("Welcome!!\n\nThis program will help you copy all content of your CD/DVD to a new directry \n\n" +
                "naming convention must be in this format: ### #####\n\nPress Enter to start...\n");

            while (Console.ReadKey(true).Key != ConsoleKey.Escape)

            {
                Console.Write("Enter Parent folder Name: ");
                ParentFolderName = Console.ReadLine();
                string text = ParentFolderName;
                string contains = " ";
                bool b = text.Contains(contains);
                if ( b == true)
                {

                    //Set the Child folder name to be same as Parent.
                    ChildFolderName = ParentFolderName;
                    string TopLevel = @"" + ParentFolderName;
                    if (!System.IO.Directory.Exists(TopLevel))
                    {
                        string pathString = System.IO.Path.Combine(TopLevel, ChildFolderName);
                        System.IO.Directory.CreateDirectory(pathString);

                    }
                    else
                    {
                        Console.WriteLine("The Folder: \"{0}\" already exists.\n\n", TopLevel);
                        Console.WriteLine("Please Exit the program and re-name the folder .\n\n");
                        System.Console.WriteLine("Press Enter twice to exit.");
                        System.Console.ReadKey();
                        return;
                    }
                    // To create a string that specifies the path to a subfolder under your 
                    // top-level folder, add a name for the subfolder to folderName.
                    //string pathString2 = @"c:\"+ ParentFolderName +"\\" + ChildFolderName;
                    // You can extend the depth of your path if you want to.
                    //pathString = System.IO.Path.Combine(pathString, "SubSubFolder");

                    string sourceDirectory = @"E:\";
                    string targetDirectory = TopLevel +"\\" + ChildFolderName;

                    Copy(sourceDirectory, targetDirectory);
                    string root = TopLevel + "\\" + ChildFolderName + "\\System Volume Information";
                    //This part will delete the System generated folder.
                    // If directory does not exist, don't even try 
                    if (Directory.Exists(root))
                    {
                        foreach (string files in Directory.GetFiles(root))
                        {
                            FileInfo fileInfo = new FileInfo(files);
                            fileInfo.Delete(); //delete the files first. 
                        }

                        Directory.Delete(root);
                    }
                    // Keep the console window open in debug mode.
                    System.Console.Write("All Neccery folders have been copied..\n\n" + "Pleace check the target directory.\n\n" +
                        "Hit Escape twice to exit or Enter to continue.\n");
                    // System.Console.ReadKey();
                }
                else
                {
                    //Console.WriteLine("The Folder: \"{0}\" already exists.\n\n", TopLevel);
                    Console.WriteLine("\nAn Error has occurred due to NOT following the naming convention.\n\n");
                    Console.WriteLine("Please Make sure the Folder name correct\n\nExit the program and restart.\n\n");
                    System.Console.WriteLine("Press Enter twice to exit.");
                    System.Console.ReadKey();
                    return;
                }

            }

        }
    }
    }

我在这一行得到的格式错误的例外：

 DirectoryInfo diTarget = new DirectoryInfo(targetDirectory);

如果我把驱动器硬编码为@“C:\”，它就可以正常工作

string targetDirectory = @"c:\" + ParentFolderName + "\\" + ChildFolderName;

谁能帮我一下吗。我需要将目标目录和源代码设置为完全由用户决定。 谢谢

试试这个：

string targetDirectory = @"c:\" + ParentFolderName + "\" + ChildFolderName;

或者这个：

string targetDirectory = "c:\\" + ParentFolderName + "\\" + ChildFolderName;

问题是“\”在字符串中用作转义字符。当用户输入D:\C#时，不会将其视为路径。因此，

DirectoryInfo diTarget=newdirectoryinfo（targetDirectory）引发无法识别路径的异常，因为
字符串targetDirectory
的路径值不正确。为了解决这个问题，我们采取以下措施：

Console.Write("Enter Parent folder Name: ");
path = @"" + Console.ReadLine(); 

这样，用户可以输入任何目录。Ex）D:\测试
在我的代码中，它通过说
ChildFolderName=ParentFolderName来创建父目录和子目录现在的问题是我不能有D:\testD:\test的路径
要解决这个问题，您需要创建另一个存储用户输入的变量-first 3 char并将其分配给childFolderName

 path = @"" + Console.ReadLine();
 ParentFolderName = path.Substring(3); 
 ChildFolderName = ParentFolderName;

以及：

如果您遇到异常，您需要。并找出什么是
targetDirectory
。@DourHighArch异常在标题中，目标目录是用户输入的，如问题和代码注释所示。抱歉代码太长，但希望有一天其他人会使用它。请阅读我发布的链接；您的标题仅包含例外情况中的几个词，不足以让我们说出问题所在。我猜用户没有访问文件夹或目录的权限，或者选择了无效的名称。一般来说，让文件路径“完全由用户决定”是个坏主意，因为文件路径的规则是。我同意起初驱动器是硬编码的，但我的领导希望由用户来设置起始和结束。我解决了这个问题，我将很快发布答案。
string targetDirectory=Path.Combine（“c:\”，ParentFolderName，ChildFolderName）谢谢Dmitry:）谢谢大家的回复，我知道我可以按照问题中提到的方式让它工作。我的问题是我希望用户能够输入C:\或D:\我不希望它硬编码。我发现这是一个解决方案：Console.Write（“输入父文件夹名称：”）；ParentFolderName=@“+Console.ReadLine（）；这意味着，如果您引用代码，我不能让父值和子值与我现在所做的相同。请记住，您的用户可能无法控制驱动器名。@CountLessQ
Console.ReadLine（）？你偏离了轨道。
string sourceDirectory = @"E:\";
string targetDirectory = path + "\\" + ChildFolderName;