UWP 将多个文件从资产复制到指定位置

Posted 2023-04-13

【中文标题】UWP 将多个文件从资产复制到指定位置

【英文标题】：UWP Copy Multiple Files from Assets to Specified Location

【发布时间】：2020-02-04 21:28:30

【问题描述】：

所以我已经做到了这一点：

private async void DownloadButton_Click(object sender, RoutedEventArgs e)
   
    // Pick a location to create new folder in.

    FolderPicker picker = new FolderPicker  SuggestedStartLocation = PickerLocationId.Downloads ;
    picker.FileTypeFilter.Add("*");
    StorageFolder folder = await picker.PickSingleFolderAsync();

    // Create new folder with "custom name" + replaces existing.

    var projectFolderName = "New Folder 2";
    StorageFolder projectFolder = await folder.CreateFolderAsync(projectFolderName, CreationCollisionOption.ReplaceExisting);

    //Pick a file to be copied

    StorageFile file = await StorageFile.GetFileFromApplicationUriAsync(new Uri("ms-appx:///Assets/NewFolder1/File1.png"));
    StorageFile file2 = await StorageFile.GetFileFromApplicationUriAsync(new Uri("ms-appx:///Assets/File2.png"));

    //Paste copied file in custom folder.

    await file.CopyAsync(projectFolder, "File1.png");
    await file2.CopyAsync(projectFolder, "File2.png");
    
  

我不知道如何一次获取所有文件并将它们全部复制。

我可以为每个文件编写新的复制/粘贴行，但必须有更简单的方法将它们放在一起。

谢谢？

【参考方案1】：

我不知道如何一次获取所有文件并复制 他们都在一起。

这是使用您的代码实现此目的的一种方法：

首先，您需要获取 Assets (Source) 文件夹。

您将能够使用此行来做到这一点：

StorageFolder assetsFolder = await Windows.ApplicationModel.Package.Current.InstalledLocation.GetFolderAsync(@"Assets");

然后从Source枚举文件并复制到指定文件夹（Destination）

 foreach (StorageFile assetFile in await assetsFolder.GetFilesAsync())
 
     await assetFile.CopyAsync(projectFolder, $"Guid.NewGuid().ToString().png");
 

这是调整后的代码：

private async void DownloadButton_Click(object sender, RoutedEventArgs e)
        
            // Pick a location to create new folder in.
            FolderPicker picker = new FolderPicker  SuggestedStartLocation = PickerLocationId.Downloads ;
            picker.FileTypeFilter.Add("*");
            StorageFolder folder = await picker.PickSingleFolderAsync();

            // Create new folder with "custom name" + replaces existing.

            var projectFolderName = "New Folder 2";
            StorageFolder projectFolder = await folder.CreateFolderAsync(projectFolderName, CreationCollisionOption.ReplaceExisting);

            // Copy all files from assets folder and paste to destination.
            StorageFolder assetsFolder = await Windows.ApplicationModel.Package.Current.InstalledLocation.GetFolderAsync(@"Assets");

            foreach (StorageFile assetFile in await assetsFolder.GetFilesAsync())
            
                await assetFile.CopyAsync(projectFolder, $"Guid.NewGuid().ToString().png");
            
        

【参考方案2】：

非常感谢！这确实帮助了很多，但是。

我必须回答我自己的问题，因为我调整了您的调整以准确了解我最初的目标。

private async void DownloadButton_Click(object sender, RoutedEventArgs e)
        
            // Pick a location to create new folder in.
            FolderPicker picker = new FolderPicker  SuggestedStartLocation = PickerLocationId.Downloads ;
            picker.FileTypeFilter.Add("*");
            StorageFolder folder = await picker.PickSingleFolderAsync();

            // Create new folder with "custom name" + replaces existing.

            var projectFolderName = "New Folder 2";
            StorageFolder projectFolder = await folder.CreateFolderAsync(projectFolderName, CreationCollisionOption.ReplaceExisting);

            // Copy all files from assets folder and paste to destination.
            StorageFolder assetsFolder = await Windows.ApplicationModel.Package.Current.InstalledLocation.GetFolderAsync(@"Assets\NewFolder1");

            foreach (StorageFile assetFile in await assetsFolder.GetFilesAsync())
            
                await assetFile.CopyAsync(projectFolder");
            
        

我实际上需要“资产”文件夹中的一个文件夹 (@"Assets\NewFolder1");

还有await assetFile.CopyAsync(projectFolder, $"Guid.NewGuid().ToString().png");

实际上将该文件夹中的所有内容保存为“.png”文件，名称为“1234-456-789”等随机名称

因此，被替换为await assetFile.CopyAsync(projectFolder); 以保存具有原始扩展名和名称的所有内容。

就是这样！

再次感谢！ x]