我想将文本内容写入位于Assets
文件夹的文件中,所以我访问文件但我无权写入文件,我的代码是:
try {
//get the file
StorageFile storageFile = await StorageFile.GetFileFromApplicationUriAsync(new Uri("ms-appx:///assets/test.txt"));
//try to write sring to it
await FileIO.WriteTextAsync(storageFile, "my string");
} catch (Exception ex) {
Debug.WriteLine("error: " + ex);
}
我收到错误:
Exception thrown: 'System.UnauthorizedAccessException' in mscorlib.ni.dll
error: System.UnauthorizedAccessException: Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED))
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
at MyProject.MainPage.<overWriteHtmlSrcFile>d__6.MoveNext()
不得不提到我需要更改此文件到期应用程序方案,或者是否有办法在公共应用程序文件夹中创建此文件,然后将其移动到资产中。
答案 0 :(得分:8)
位于Assets
文件夹中的文件为read only
,这就是您获得此异常的原因。就像最后提到的那样,有一种方法可以在公共场所创建文件,将所需内容写入其中,然后将文件移动到assets文件夹中。它会像:
try {
//create file in public folder
StorageFolder storageFolder = ApplicationData.Current.LocalFolder;
StorageFile sampleFile = await storageFolder.CreateFileAsync("test.txt", CreationCollisionOption.ReplaceExisting);
//write sring to created file
await FileIO.WriteTextAsync(sampleFile, htmlSrc);
//get asets folder
StorageFolder appInstalledFolder = Windows.ApplicationModel.Package.Current.InstalledLocation;
StorageFolder assetsFolder = await appInstalledFolder.GetFolderAsync("Assets");
//move file from public folder to assets
await sampleFile.MoveAsync(assetsFolder, "new_file_name.txt", NameCollisionOption.ReplaceExisting);
} catch (Exception ex) {
Debug.WriteLine("error: " + ex);
}