static List<Mulu> GetMuluList(string path)//获取一级目录并记录到Mulu对象中返回一个mulu类型的list反省集合
{

if (Directory.Exists(path))
{
List<Mulu> ltml = new List<Mulu>();
string[] arrdir = Directory.GetDirectories(path);
for (int i = 0; i < arrdir.Length; i++)
{
Mulu newml = new Mulu() { title = System.IO.Path.GetFileName(arrdir[i]), path = arrdir[i] };
ltml.Add(newml);
SetMuluChildren(newml);
}
return ltml;
}
else
{
return null;
}
}

static void SetMuluChildren(Mulu ml) //递归设置每个mulu对象path目录下的子文件夹记录到children集合中
{
string[] arrdir = Directory.GetDirectories(ml.path);
ml.numberoffile = Directory.GetFiles(ml.path, "*", SearchOption.AllDirectories).Length;
ml.title += " (" + ml.numberoffile + ")";

for (int i = 0; i < arrdir.Length; i++)
{
Mulu newml = new Mulu() { title = System.IO.Path.GetFileName(arrdir[i]), path = arrdir[i] };
ml.Children.Add(newml);
SetMuluChildren(newml);
}
}

public class Mulu
    {
        public string title //记录显示的标题
        {
            get;
            set;
        }
        public string path //记录完整的目录
        {
            get;
            set;
        }
        public int numberoffile //记录目录下所有的文件数量 包含子目录
        {
            get;
            set;
        }
        public List<Mulu> Children //记录子目录
        {
            get;
            set;
        }
        public Mulu()
        {
            Children = new List<Mulu>();
        }
    }

WPF界面中TreeView

<TreeView Name="tv" Grid.Column="0" Margin="0,0,0,-0.333" TreeView.SelectedItemChanged = "tvSelect" >
<TreeView.ItemTemplate>
<HierarchicalDataTemplate ItemsSource="{Binding Path=Children}">
<StackPanel Orientation="Horizontal">
<Image VerticalAlignment="Center" Source="/WPF_FTP;component/Images/Dir.ico" Width="16" Height="16" Margin="2,2,2,2"></Image>
<TextBlock VerticalAlignment="Center" Text="{Binding title}"></TextBlock>
<StackPanel.ToolTip>
<TextBlock Text="{Binding numberoffile}" TextWrapping="Wrap"></TextBlock>
</StackPanel.ToolTip>
</StackPanel>
</HierarchicalDataTemplate>
</TreeView.ItemTemplate>
</TreeView>