如何在ftp服务器上搜索指定的扩展名文件？

Question

如何使函数为此支持参数

 public List<string> getfiles(string FTPhostname, string FTPpath,string FTPusername,string FTPpassword,string extension)
{
 'request to ftp hostname 
 'get response from 
 'list all directories and files
 'search for spesified extension files
}

有什么办法吗？

Answer 1

这是返回列表的函数的解决方案

 public List<string> getfiles(string FTPhostname, string FTPpath,string FTPusername,string FTPpassword,string extension)
    {
        FtpWebRequest ftpRequest = (FtpWebRequest)WebRequest.Create("ftp://" + FTPhostname + "/" + FTPpath );
        ftpRequest.Credentials = new NetworkCredential(FTPusername , FTPpassword );
        ftpRequest.Method = WebRequestMethods.Ftp.ListDirectory; 

        FtpWebResponse response = (FtpWebResponse)ftpRequest.GetResponse();
        StreamReader streamReader = new StreamReader(response.GetResponseStream());

        List<string> results = new List<string>();

        string line = streamReader.ReadLine();
        while (!string.IsNullOrEmpty(line))
        {

            if (line.Contains(extension)) {
                line = streamReader.ReadLine();
                results.Add(line);}

            else {line = streamReader.ReadLine(); }
                           }

        streamReader.Close();
        return results;
    }

然后为ex： png文件调用此函数

  String[] txtfounds= getfiles("ftp.piacton.com", "/Public/Software/Official/LightField/Archives/", "anonymous", "k3tnel31@k.com", ".png").ToArray();

如果要将此结果添加到lisbox：

listBox1.DataSource = txtfounds;

Answer 2

发生错误，您需要执行

results.Add(line);

在您致电之前

results.Add(line);

获取正确的文件。