Why is my file path invalid?

Question

Ok, so I had a Unity project on my mac computer and tried transferring into a windows. I've tried just using the same file and then also transferring just the assets into a new project. Neither are working and both give me this error saying my directory is no good: "IOException: The directory name is invalid System.IO.Directory.CreateDirectoriesInternal (System.String path) (at :0) System.IO.Directory.CreateDirectory (System.String path) (at :0) SaveLoad.save[T] (T pyramid, System.String key, System.String fileName) (at Assets/Scripts/SaveLoad.cs:18)..."

This program works on my mac and thought my code was universal:

public static class SaveLoad { public static string fileType = ".jesus";

 public static void save<T>(T pyramid, string key, string fileName)
 {
     BinaryFormatter formatter = new BinaryFormatter();

     string path = Application.persistentDataPath + "/" + fileName + "/";
     Directory.CreateDirectory(path);
     FileStream stream = new FileStream(path + key + fileType, FileMode.Create);

     formatter.Serialize(stream, pyramid);
     stream.Close();
 }

 public static T load<T>(string key, string fileName)
 {
     string path = Application.persistentDataPath + "/" + fileName + "/";

     BinaryFormatter formatter = new BinaryFormatter();
     FileStream stream = new FileStream(path + key + fileType, FileMode.Open);

     T data = (T)formatter.Deserialize(stream);
     stream.Close();

     return data;
 }

 public static bool checkFile(string key, string fileName)
 {
     return File.Exists(Application.persistentDataPath + "/" + fileName + "/" + key + ".jesus");
 }

 public static bool checkDirectory(string fileName)
 {
     return Directory.Exists(Application.persistentDataPath + "/" + fileName + "/");
 }

 public static void deleteAll(string fileName)
 {
     string path = Application.persistentDataPath + "/" + fileName + "/";
     DirectoryInfo directory = new DirectoryInfo(path);
     directory.Delete(true);
     Directory.CreateDirectory(path);
 }

}

Answer 1

Answer by Bunny83 · Oct 11, 2020 at 01:58 AM

Windows is using backslashes \` while unix / mac / linux uses forward slashes /`. It' generally recommended to not use slashes at all but to use System.IO.Path.Combine instead.

 string path = System.IO.Path.Combine(Application.persistentDataPath, fileName);
 string file = System.IO.Path.Combine(path, key + fileType);

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Answer 2

@Bunny83 Thank you, that makes a lot of sense. When trying to create something to fix this: public static string convertPath(string fileName) { string path = Application.persistentDataPath; path = System.IO.Path.Combine(path, fileName); UnityEngine.Debug.Log(path); return path; }

 public static string convertPath(string[] fileNames)
 {
     string path = Application.persistentDataPath;// + "/" + fileName;// + "/";
     for (int i = 0; i < fileNames.Length; i++)
     {
         path = System.IO.Path.Combine(path, fileNames[i]);
     }
     UnityEngine.Debug.Log(path);
     return path;
 }

I added debugs to get e result and got this: "C:/Users/nopassword/AppData/LocalLow/DefaultCompany/Tiddle\Saves\Main/0:0" and "C:/Users/nopassword/AppData/LocalLow/DefaultCompany/Tiddle\Saves" along with the same error. I tried just correcting the problem by just adding my own slashes and had no suches.

Edit:I forgot to mention. This function is to get the file directory. I realize the names are confusing, I was just trying to make something that worked

Why is my file path invalid?

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