Xamarin:Android:System.UnauthorizedAccessException:对路径的访问被拒绝 [英] Xamarin : Android : System.UnauthorizedAccessException: Access to the path is denied

问题描述

所以我正在尝试创建一个文件，但我得到了System.UnauthorizedAccessException:拒绝访问路径/DownloadJitters".我不确定这是权限问题(我已经尝试写入外部存储以防万一但没有用)还是其他问题.此外，我试图找出一个写这些文件的好地方，因为我希望它们不容易被找到.有任何想法吗?代码如下:

So I'm trying to create a file and I'm getting System.UnauthorizedAccessException: Access to the path "/DownloadJitters" is denied. I'm not sure if it's a permissions thing (I've tried a write to external storage in case but that didn't work) or something else. Also I'm trying to figure out a good place to write these files as I would like them not to be easily found. Any ideas? Here's the code as well :

public void favouriteList(MainActivity av, Ordering o, string favouriteName, string totalCost, JittersListView jlv)
    {
        //Checks Directory exists
        if (File.Exists(Android.OS.Environment.DirectoryDownloads + "/Jitters/FavouritesListAdded.txt") == false)
        {
            Directory.CreateDirectory(Android.OS.Environment.DirectoryDownloads + "Jitters/FavouriteList/");
            File.Create(Android.OS.Environment.DirectoryDownloads + "/Jitters/FavouritesListAdded.txt");
        }

        if (File.Exists(Android.OS.Environment.DirectoryDownloads + "Jitters/FavouriteList/" + favouriteName + ".txt") == false)
        {
            var fav = File.Create(Android.OS.Environment.DirectoryDownloads + "Jitters/FavouriteList/" + favouriteName + ".txt");
            fav.Close();
            string file = Android.OS.Environment.DirectoryDownloads + "Jitters/FavouriteList/" + favouriteName + ".txt";
            string added = null;
            int current = 0;
            while (true)
            {
                if (current < jlv.Count)
                {
                    JittersListItem jli = jlv[current];
                    added += jli.Top + "|" + jli.Bottom + "|" + jli.itemPic + "|" + jli.itemDes + System.Environment.NewLine;
                    current++;
                }
                else
                {
                    break;
                }
            }
            File.AppendAllText(file, favouriteName + "|" + totalCost + added);
        }
        else
        {
            new AlertDialog.Builder(av)
                    .SetMessage("Please use a different name, this one has been taken.")
                    .Show();
        }
    }

推荐答案

Ok I 通过将保存位置更改为System.Environment.GetFolderPath(System.Environment.SpecialFolder.Personal)

Ok I Fixed it by changing the saving location to System.Environment.GetFolderPath(System.Environment.SpecialFolder.Personal)

不要问我为什么当他们需要相同的权限时这样做有效，但确实如此.

Don't ask me why that worked when they need the same permissions but it did.

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