UWP/C#/IoT/RPi:从RPi上的Win IoT访问USB设备(Stick)并将其复制到KnownFolders [英] UWP/C#/IoT/RPi: Access USB Device (Stick) from Win IoT on RPi AND Copy to KnownFolders

问题描述

这是我的挑战:

• Raspi上的Windows IoT，C#UWP-App
• 在启动或快打...
  • 枚举连接的USB设备
  • 选择USB记忆棒
  • 枚举棍子上的字段和文件夹
  • 如果找到某个文件夹名称，则将文件夹原样复制到KnownFolders.Documents
  • Windows IoT on Raspi, C# UWP-App
  • On Boot or klick...
    • Enumerate connected USB devices
    • Select the USB Stick
    • Enumerate Fiels and folders on the stick
    • If a certain folder name is found, copy folder as-is to KnownFolders.Documents

    令人惊讶的是，网络上有很多解决方案，但几乎没有一个可行.

    It is astonishing that there are many half solutions on the web but none of them hardly works.

    我尝试过的一些事情:

    var removableDeviceList = await KnownFolders.RemovableDevices.GetFoldersAsync();
                if (removableDeviceList.Count > 0)
                {
                    StorageFolder targetDevice = removableDeviceList.FirstOrDefault();
                    ListBox.Items.Add(targetDevice.Name);
    }
    

    目前为止工作正常，但后来停滞了.

    Works so far but stuck afterwards.

    是的，清单中激活了图片库，文件定义，可移动设备等功能.我不敢相信这个基本的事情真的很难解决吗?

    And yes, functions like Picture library, file definitions, removable devices are activated in the manifest. I can't believe that this basic thing is really such a difficult task to solve?

    推荐答案

    有一个示例我在带有Windows 10 IoT核心版的Raspberry Pi 3上进行了测试.这个对我有用.

    There is an example I test on Raspberry Pi 3 with Windows 10 IoT Core. It works for me.

    源文件夹:USB驱动器根目录中的测试文件夹(E:\ test).一共有三个文件:hello.txt，welcome1.png，welcome3.jpg.

    Source folder: test folder in USB drive root(E:\test). There are three files: hello.txt, welcome1.png, welcome3.jpg .

    目标文件夹:KnownFolders.DocumentsLibrary根文件夹.

    Destination folder: KnownFolders.DocumentsLibrary root folder.

    以下代码将测试文件夹中的文件完整复制到KnownFolders.DocumentsLibrary根文件夹中.

    The following code complete copy files in test folder to KnownFolders.DocumentsLibrary root folder.

       public async void USBDriveCopyFolder()
        {
            var targetFolderName = "test";
    
            var removableDevice = (await KnownFolders.RemovableDevices.GetFoldersAsync()).FirstOrDefault();
            if (null == removableDevice)
            {
                System.Diagnostics.Debug.WriteLine("removableDevice is null !");
                return;
            }
            System.Diagnostics.Debug.WriteLine(removableDevice.Name + ":\n");
    
            var sourceFolder = await removableDevice.GetFolderAsync(targetFolderName);
            if (null == sourceFolder)
            {
                System.Diagnostics.Debug.WriteLine(targetFolderName + " folder is not found !");
                return;
            }
            System.Diagnostics.Debug.WriteLine(sourceFolder.Name + ":\n");
    
            var destFodler = KnownFolders.DocumentsLibrary;
            if (null == destFodler)
            {
                System.Diagnostics.Debug.WriteLine("KnownFolders.DocumentsLibrary folder get failed !");
                return;
            }
    
            var files = await sourceFolder.GetFilesAsync();
    
            foreach (var file in files)
            {
                System.Diagnostics.Debug.WriteLine(file.Name + "\n");
                await file.CopyAsync(destFodler);
            }
    
        }
    

    package.appxmanifest中的设备功能:

    Device capabilities in package.appxmanifest:

      <Applications>
    
        ...
        ...
    
        <Application>
          <Extensions>
            <uap:Extension Category="windows.fileTypeAssociation">
              <uap:FileTypeAssociation Name="txt">
                <uap:SupportedFileTypes>
                  <uap:FileType>.txt</uap:FileType>
                </uap:SupportedFileTypes>
              </uap:FileTypeAssociation>
            </uap:Extension>
            <uap:Extension Category="windows.fileTypeAssociation">
              <uap:FileTypeAssociation Name="jpg">
                <uap:SupportedFileTypes>
                  <uap:FileType>.jpg</uap:FileType>
                </uap:SupportedFileTypes>
              </uap:FileTypeAssociation>
            </uap:Extension>
            <uap:Extension Category="windows.fileTypeAssociation">
              <uap:FileTypeAssociation Name="png">
                <uap:SupportedFileTypes>
                  <uap:FileType>.png</uap:FileType>
                </uap:SupportedFileTypes>
              </uap:FileTypeAssociation>
            </uap:Extension>
          </Extensions>
        </Application>
      </Applications>
      <Capabilities>
        <uap:Capability Name="picturesLibrary" />
        <uap:Capability Name="removableStorage" />
        <uap:Capability Name="documentsLibrary" />
      </Capabilities>
    

    这篇关于UWP/C#/IoT/RPi:从RPi上的Win IoT访问USB设备(Stick)并将其复制到KnownFolders的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！