「DeleteAsync」和「File.Delete」之間的區別以及爲什麼「DeleteAsync」不刪除文件？

Question

想知道爲什麼「DeleteAsync」不會刪除文件，但「File.Delete」會執行此操作。誰可以給我解釋一下這個？起初我認爲該文件是打開的，但如果文件打開「File.Delete」不應該刪除它也...或？

private static async void FILESYSTEM_RemoveVideoPosterIfExist(string posterFileNameOnStorage) 
{ 
    IStorageItem videoPosterIStorageItem = await ApplicationData.Current.LocalFolder.TryGetItemAsync(SYSTEM_UserVideoPosterFolder + @"\" + DATABASE_SelectedUserInformation.UserName + "." + SYSTEM_UserPosterFolderExtension + @"\" + posterFileNameOnStorage); 
    if (videoPosterIStorageItem != null) 
    { 
     try 
     { 
      //Why this doesn't delete file... 
      await videoPosterIStorageItem.DeleteAsync(StorageDeleteOption.PermanentDelete); 
     } 
     catch 
     { 
      //But this one will delete file. 
      StorageFolder applicationStorageFolder = await ApplicationData.Current.LocalFolder.GetFolderAsync(SYSTEM_UserVideoPosterFolder + @"\" + DATABASE_SelectedUserInformation.UserName + "." + SYSTEM_UserPosterFolderExtension + @"\"); 
      File.Delete(applicationStorageFolder.Path + @"\" + posterFileNameOnStorage); 
     } 
    } 
} 

Answer 1

原因很可能是沒有本地函數異步刪除文件。託管API通常是非託管API的包裝。

看看這個

Why isn't there an asynchronous file delete in .net?

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希望這有助於！