如何在列表视图中查看驱动器的所有目录 [英] how to view all directories of drive ina listview

问题描述

你好朋友，



i有一个treeview控件，我列出所有驱动器.....在选择驱动器时我必须显示其所有目录和列表视图中的文件.....我正在使用以下代码..

hello friends,

i have a treeview control in which i am list all drive.....on selecting a drive i have to show all of its directories and files in a listview.....i am using following code..

private void treeView1_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e)
       {
           //string[] omit = { ".doc", ".mp3", ".cs" };
           TreeNode newSelected = e.Node;
           listView1.Items.Clear();
           DirectoryInfo nodeDirInfo = (DirectoryInfo)newSelected.Tag;
           ListViewItem.ListViewSubItem[] subItems;
           ListViewItem item = null;

           foreach (DirectoryInfo dir in nodeDirInfo.GetDirectories())
           {
               item = new ListViewItem(dir.Name, 0);
               subItems = new ListViewItem.ListViewSubItem[]
                   {new ListViewItem.ListViewSubItem(item, "Directory"),
                    new ListViewItem.ListViewSubItem(item,
                       dir.LastAccessTime.ToShortDateString())};
               item.SubItems.AddRange(subItems);
               //      checkedListBox1.Items.Add(item);
               listView1.Items.Add(item);
           }

当谈到 DirectoryInfo nodeDirInfo = （DirectoryInfo）newSelected.Tag ... line ...它加载空值....

因为它选择C：\\形式e.node属性... 。

如何解决这个错误....所以它可以选择C：\ .. ??

when it comes to DirectoryInfo nodeDirInfo=(DirectoryInfo)newSelected.Tag...line...it loads null value....
because it select C:\\ form e.node property....
how to solve this error....so it can select C:\..??

推荐答案

用于填充驱动器，将DirectoryInfo分配给新TreeNode的Tag属性：

For populating the drives, assign the DirectoryInfo to the Tag property of the new TreeNode:

foreach (System.IO.DriveInfo drive in drives)
{
 if (drive.DriveType == System.IO.DriveType.CDRom)
 {
  continue;
 }
 else
 {
  TreeNode mn = new TreeNode(drive.Name);
  treeView1.Nodes.Add(mn);
  string str = mn.FullPath;
  DirectoryInfo info1 = new DirectoryInfo(@str);  // I guess the '@' has to (can) be removed
  mn.Tag = info1;  // this has to be added!
  GetDirectories(info1.GetDirectories(), mn);
 }
}

你应该使用 System.IO.Directory.GetDirectories ：

http://msdn.microsoft.com /en-us/library/c1sez4sc.aspx [ ^ ]，

http://msdn.microsoft .com / zh-CN / library / 6ff71z1w.aspx [ ^ ]，

http：// msdn .microsoft.com / zh-CN / library / ms143314.aspx [ ^ ]。



此外，您应该更好地了解一个令人不快的Microsoft问题。请参阅我以前的回答： Directory.Get.Files搜索模式问题 [ ^ ]。

-SA

You should rather use System.IO.Directory.GetDirectories:
http://msdn.microsoft.com/en-us/library/c1sez4sc.aspx[^],
http://msdn.microsoft.com/en-us/library/6ff71z1w.aspx[^],
http://msdn.microsoft.com/en-us/library/ms143314.aspx[^].

Also, you should better be aware of one unpleasant Microsoft problem. Please see my past answer: Directory.Get.Files search pattern problem[^].

—SA

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