[转]C#搜索抓取本地硬盘文件

问题描述：譬如说要搜索d:盘中的所有后缀为html的文件。这里只是简单实现一个抓取的类，大家可以根据需要自行扩展
关键是用到一个递归函数，依此搜索子文件夹下的文件，按照时间保存

public class SearchBase
{
    private SearchBase()
    { 
    }
    static int ra;
 
    public static void addSubDirectory(DirectoryInfo directory, string pattern)
    {
        foreach (FileInfo fi in directory.GetFiles(pattern))
        {
            addrelativeDocument(fi.FullName);
        }
        foreach (DirectoryInfo di in directory.GetDirectories())
        {
            addSubDirectory(di, pattern);
        }
    }
    public static void addrelativeDocument(string path)
    {
        string html;
        using (StreamReader sr = new StreamReader(path, System.Text.Encoding.Default))
        {
            html = sr.ReadToEnd();
        }
        string time = DateTime.Now.ToLongTimeString();
        string[] timetopath = time.Split(':');
        string newtime = null;
        for (int i = 0; i < timetopath.Length; i++)
        {
            newtime += timetopath[i].ToString();
        }
        newtime += "(" + ra + ")";
        string p = @"f:files" + newtime + ".txt";
        if (!File.Exists(p))
        {
            FileStream fs = new FileStream(p, FileMode.Create, FileAccess.Write);
            StreamWriter sw = new StreamWriter(fs);
            sw.Write(html);
            sw.Close();
            fs.Close();
        }
        ra++;
    }
}