使用c#和shell32实现安卓设备的递归

Question

当我想要递归任何文件夹的完整结构时，我正在使用Shell32，它可以连接到字母驱动器c:\;d:\ etc和没有字母的连接设备，如安卓平板电脑。

我的问题是我不能将文件夹从FolderItem解压到递归。

谢谢。

Using Shell32; // reference  browse to c:\Windows\System32\shell32.dll

class x
{
public int Hwnd { get; private set; }
public void ListAllFolderObjects()
{

 Shell32.Shell shell = new Shell32.Shell();
 Folder folder = shell.BrowseForFolder((int)Hwnd, "Choose Folder", 0, 0);
 if (folder != null)
    GetFolderObjects(folder);
}

private void GetFolderObjects(Folder folder)
{
 foreach (FolderItem currentItem in folder.Items())
 {
    // a
    string sType = currentItem.Type;
    string sName = currentItem.Name; 

    if (sType == "folder")
    {
      //  problem here - cannot get a folder from currentItem
      //  how do I cast FolderItem to Folder???????
      GetFolderObjects(currentItem); // recurse
 }
}
}

// from main
ListAllFolderObjects();

Answer 1

通过使用以下方法解决问题：

currentItem.GetFolder as Folder

Answer 2

您必须对currentfolder对象进行显式强制转换，如下所示

Using Shell32; // reference  browse to c:\Windows\System32\shell32.dll

class x
{
public int Hwnd { get; private set; }
public void ListAllFolderObjects()
{

 Shell32.Shell shell = new Shell32.Shell();
 Folder folder = shell.BrowseForFolder((int)Hwnd, "Choose Folder", 0, 0);
 if (folder != null)
    GetFolderObjects(folder);
}

private void GetFolderObjects(Folder folder)
{
 foreach (FolderItem currentItem in folder.Items())
 {
    // a
    string sType = currentItem.Type;
    string sName = currentItem.Name; 

    if (sType == "folder")
    {
        Folder f = (Folder)currentItem.GetFolder; //cast object
        GetFolderObjects(f); // recurse
 }
}
}

// from main
ListAllFolderObjects();