目录检查不起作用

Question

I tried creating a program that tells you if a directory exists or not, but no matter what I input, it always comes up as not existing.

My Code:

using System;
using System.IO;

class TestFileAndDirectory
{
    public static void Main()
    {
        string input;
        input = Console.ReadLine();
        if ( Directory.Exists(input))
        {
            Console.WriteLine("Exists");
        }
        else
        {
            Console.WriteLine("Doesn't Exist");
        }
        Console.ReadLine();
    }
}

At first I just thought maybe it was my logic, so I tried this code from the book: Microsoft Visual C# 2010: Comprehensive Ch.14:

using System;
using System.IO;
public class DirectoryInformation
{
   public static void Main()
   {
      string directoryName;
      string[] listOfFiles;
      Console.Write("Enter a folder >> ");
      directoryName = Console.ReadLine();
      if(Directory.Exists(directoryName))
      {
         Console.WriteLine("Directory exists, " +
            "and it contains the following:");
         listOfFiles = Directory.GetFiles(directoryName);
         for(int x = 0; x < listOfFiles.Length; ++x)
           Console.WriteLine("   {0}", listOfFiles[x]);
      }
      else
      {
         Console.WriteLine("Directory does not exist");
      }
   }
}

When I tried this code it did not work either not even if I put it into the same base folder as the directory I'm trying to find.

Path in question: C:\\C#\\Chapter.14\\Cat Haikus

Path of Program: C:\\C#\\Chapter.14\\TestFilesAndDirectories.cs

Answer 1

The path parameter is permitted to specify relative or absolute path information. Relative path information is interpreted as relative to the current working directory.

Source: https://msdn.microsoft.com/en-us/library/system.io.directory.exists(v=vs.110).aspx

If your input string is only a folder name like "Chapter. 14" (relative path), then this folder must exist in the path of your executable file. Like PathOfTheExecutableFile\\Chapter. 14 PathOfTheExecutableFile\\Chapter. 14 .

If the folder is in a completely different place, use absolute paths. Like C:\\Users\\theuser\\Desktop\\Chapter. 14 C:\\Users\\theuser\\Desktop\\Chapter. 14 .

Update:

Since you want to check C:\\C#\\Chapter.14\\Cat Haikus folder, you could check if it exists using

if (Directory.Exists(@"C:\C#\Chapter.14\Cat Haikus")){
    Console.WriteLine("Exists");
}

I don't know your exact folder tree structure, but if your executable file is in a subfolder of C:\\C#\\Chapter.14\\ , you could also use Directoy.GetParent() method.