DirectoryNotFoundException was unhandled while the use of ReadAllLines C#

Question

The following piece of code is the code used to call the .txt-file and turn it into strings.

string[] lines = System.IO.File.ReadAllLines(@"C:\This PC\Documents\Visual Studio 2015\Projects\test_read_txt\bin\Debug\read.txt");

Why wont C# recognize the location of the .txt-file? I tried with StreamReader but then the read could not be modified.

class Program
{
    static void Main(string[] args)
    {
        // Define our one and only variable
        string[] M = new string[13];

        // Read the text from the text file, and insert it into the array
        StreamReader SR = new StreamReader(@"read.txt");

        for (int i = 0; i < 13; i++)
        {
            M[i] = SR.ReadLine();
        }

        // Close the text file, so other applications/processes can use it
        SR.Close();

        // Write the array to the Console

        Console.WriteLine("The array from the txt.file: ");


        for (int i = 0; i < 13; i++)
        {
            Console.WriteLine(M[i]); // Displays the line to the user
        }

        // Pause the application so the user can read the information on the screen
        Console.ReadLine();

        if (2 == 2)
        {
            M[1][1] = 1;
        }
    }
}

It did not recognize M[1][1] as the second element of the second array because it only read the file and did not transform it into a multidimensional array. Can the following code be used for the above described problem?

tring[] lines = System.IO.File.ReadAllLines(@"C:\This PC\Documents\Visual Studio 2015\Projects\test_read_txt\bin\Debug\read.txt");

You seem to be missing a `test_read_txt` from your path. From the screenshot, there are two folders in the path with that name and you are only including one. — Chris Dunaway, Sep 19 '16 at 18:28

score 3 · Accepted Answer · answered Sep 19 '16 at 14:25

3

As users have stated, "This PC" is simply a display path, not a real one.

Try using this instead:

    string path = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments), @"Visual Studio 2015\Projects\test_read_txt\bin\Debug\read.txt");
    string[] lines = File.ReadAllLines(path);

answered Sep 19 '16 at 14:25

ThePerplexedOne

2,920
15
30

I see, then set the "path" variable to the full path. E.g. `C:\Users\{User}\Documents\...etc` – ThePerplexedOne Sep 19 '16 at 14:31
And if the text file is in the same folder as the .exe, you can just do `string[] lines = File.ReadAllLines("read.txt")` – ThePerplexedOne Sep 19 '16 at 14:36

score 2 · Answer 2 · answered Sep 19 '16 at 14:21

2

"C:\This PC\Documents" is a display path only (in so much as it doesn't physically exist), this actually equates to "C:\Users\{username}\Documents"

answered Sep 19 '16 at 14:21

Scott Perham

2,410
1
10
20

score 2 · Answer 3 · answered Sep 19 '16 at 14:26

2

C:\This PC\Documents is not the correct path

The easiest way to get the correct file path is Go to Properties of file > Security > Object name

answered Sep 19 '16 at 14:26

Pepernoot

3,409
3
21
46

DirectoryNotFoundException was unhandled while the use of ReadAllLines C#

3 Answers3