private Stream OpenFileStream(string path, FileMode fileMode)
{
switch (fileMode)
{
case FileMode.Read:
try {
return(File.OpenRead(path));
} catch (Exception) {
return(null);
}
case FileMode.Write:
try {
return(File.OpenWrite(path));
} catch (Exception) {
return(null);
}
case FileMode.CreateNew:
try {
return(File.Open(path, System.IO.FileMode.CreateNew, FileAccess.Write));
} catch (Exception e) {
return(null);
}
default:
throw new ArgumentOutOfRangeException(nameof(fileMode), fileMode, null);
}
}
public Stream OpenFile(string filename, StorageLocation storageLocation = StorageLocation.Documents, FileMode fileMode = FileMode.Read)
{
switch (storageLocation)
{
case StorageLocation.AppResource:
if (fileMode == FileMode.Write || fileMode == FileMode.CreateNew)
{
throw new NotSupportedException();
}
return(OpenFileStream(GetBundlePath(filename), fileMode));
case StorageLocation.Documents:
case StorageLocation.Cache:
break;
default:
throw new ArgumentOutOfRangeException(nameof(storageLocation), storageLocation, null);
}
return(OpenFileStream(GetFilePath(storageLocation, filename), fileMode));
}
public Stream OpenFile(string filename, StorageLocation storageLocation = StorageLocation.Documents, FileMode fileMode = FileMode.Read)
{
string filesDirPath = null;
switch (storageLocation)
{
case StorageLocation.AppResource:
if (fileMode == FileMode.Write || fileMode == FileMode.CreateNew)
{
throw new NotSupportedException();
}
return(OpenAssetFileStream(filename));
case StorageLocation.Documents:
filesDirPath = Application.Context.FilesDir.AbsolutePath;
break;
case StorageLocation.Cache:
filesDirPath = Application.Context.CacheDir.AbsolutePath;
break;
default:
throw new ArgumentOutOfRangeException(nameof(storageLocation), storageLocation, null);
}
if (filesDirPath != null)
{
var path = Path.Combine(filesDirPath, filename);
return(OpenFileStream(path, fileMode));
}
return(null);
}