| static private TryMakeWin32ErrorCodeFromHR ( int hr ) : int | ||
| hr | int | |
| Résultat | int | |
public static SafeFileHandle CreateSafeFileHandle(
this IStorageFolder rootDirectory,
string relativePath,
FileMode mode,
FileAccess access,
FileShare share = FileShare.Read,
FileOptions options = FileOptions.None)
{
if (rootDirectory == null)
{
throw new ArgumentNullException(nameof(rootDirectory));
}
if (relativePath == null)
{
throw new ArgumentNullException(nameof(relativePath));
}
HANDLE_CREATION_OPTIONS creationOptions = FileModeToCreationOptions(mode);
HANDLE_ACCESS_OPTIONS accessOptions = FileAccessToHandleAccessOptions(access);
HANDLE_SHARING_OPTIONS sharingOptions = FileShareToHandleSharingOptions(share);
HANDLE_OPTIONS handleOptions = FileOptionsToHandleOptions(options);
IStorageFolderHandleAccess handleAccess = ((object)rootDirectory) as IStorageFolderHandleAccess;
if (handleAccess == null)
{
return(null);
}
SafeFileHandle handle;
int result = handleAccess.Create(
relativePath,
creationOptions,
accessOptions,
sharingOptions,
handleOptions,
IntPtr.Zero,
out handle);
if (result != 0)
{
throw Win32Marshal.GetExceptionForWin32Error(Win32Marshal.TryMakeWin32ErrorCodeFromHR(result), relativePath);
}
return(handle);
}
public static Exception TranslateWinRTException(this Exception exception, string filePath, bool isDirectory = false)
{
int errorCode = Win32Marshal.TryMakeWin32ErrorCodeFromHR(exception.HResult);
if (isDirectory)
{
// WinRT remaps all ERROR_PATH_NOT_FOUND to ERROR_FILE_NOT_FOUND
if (errorCode == Interop.Errors.ERROR_FILE_NOT_FOUND)
{
errorCode = Interop.Errors.ERROR_PATH_NOT_FOUND;
}
}
else
{
// Existing comment from FileStream:
// NT5 oddity - when trying to open "C:\" as a FileStream,
// we usually get ERROR_PATH_NOT_FOUND from the OS. We should
// probably be consistent w/ every other directory.
// This remaps the error for non-existent drives which is incorrect
// but we need to preserve it for compatibility
if (errorCode == Interop.Errors.ERROR_PATH_NOT_FOUND && filePath.Equals(Directory.InternalGetDirectoryRoot(filePath)))
{
errorCode = Interop.Errors.ERROR_ACCESS_DENIED;
}
// Known issue: WinRT pre-check's the find data of a fullPath before trying to create it, if the type doesn't match
// (IE: open file on a directory) it will return E_INVALIDARG instead of ERROR_ACCESS_DENIED
// CreateFile returns ERROR_PATH_NOT_FOUND when given a fullPath that ends in a backslash.
// WinRT remaps all ERROR_PATH_NOT_FOUND to ERROR_FILE_NOT_FOUND
if (errorCode == Interop.Errors.ERROR_FILE_NOT_FOUND && filePath.Length > 0 && filePath[filePath.Length - 1] == Path.DirectorySeparatorChar)
{
errorCode = Interop.Errors.ERROR_PATH_NOT_FOUND;
}
}
// Known issue: We still can't handle ERROR_SHARING_VIOLATION because WinRT APIs are mapping this to ERROR_ACCESS_DENIED
// Maps all unknown exceptions to IOException to be consistent with Win32 behavior
return(Win32Marshal.GetExceptionForWin32Error(errorCode, filePath));
}
public static SafeFileHandle CreateSafeFileHandle(
this IStorageFile windowsRuntimeFile,
FileAccess access = FileAccess.ReadWrite,
FileShare share = FileShare.Read,
FileOptions options = FileOptions.None)
{
if (windowsRuntimeFile == null)
{
throw new ArgumentNullException(nameof(windowsRuntimeFile));
}
HANDLE_ACCESS_OPTIONS accessOptions = FileAccessToHandleAccessOptions(access);
HANDLE_SHARING_OPTIONS sharingOptions = FileShareToHandleSharingOptions(share);
HANDLE_OPTIONS handleOptions = FileOptionsToHandleOptions(options);
IStorageItemHandleAccess handleAccess = ((object)windowsRuntimeFile) as IStorageItemHandleAccess;
if (handleAccess == null)
{
return(null);
}
SafeFileHandle handle;
int result = handleAccess.Create(
accessOptions,
sharingOptions,
handleOptions,
IntPtr.Zero,
out handle);
if (result != 0)
{
throw Win32Marshal.GetExceptionForWin32Error(Win32Marshal.TryMakeWin32ErrorCodeFromHR(result), windowsRuntimeFile.Name);
}
return(handle);
}
