Question

我想知道这段代码有什么问题？我在000webhost上托管一个ftp，我想使用openfiledialog功能上传我的程序中的用户从那里的计算机打开的图像

打开图片的按钮：

        OpenFileDialog open = new OpenFileDialog();
        if (open.ShowDialog() == DialogResult.OK)
        {
            Bitmap bit = new Bitmap(open.FileName);
            pictureBox1.Image = bit;
            pictureBox2.Image = bit;
            bit.Dispose();
            string fullPath = open.FileName;
            string fileName = open.SafeFileName;
            string path = fullPath.Replace(fileName, "");
            User.Details.UpLoadImage(fullPath);
        }

上传代码：

try
        {
            String sourcefilepath = source; // e.g. “d:/test.docx”
            String ftpurl = "ftp://www.locu.site90.com/public_html/"; // e.g. ftp://serverip/foldername/foldername
            String ftpusername = "********"; // e.g. username
            String ftppassword = "********"; // e.g. password
            string filename = Path.GetFileName(source);
            string ftpfullpath = ftpurl;
            FtpWebRequest ftp = (FtpWebRequest)FtpWebRequest.Create(ftpfullpath);
            ftp.Credentials = new NetworkCredential(ftpusername, ftppassword);

            ftp.KeepAlive = true;
            ftp.UseBinary = true;
            ftp.Method = WebRequestMethods.Ftp.UploadFile;

            FileStream fs = File.OpenRead(source);
            byte[] buffer = new byte[fs.Length];
            fs.Read(buffer, 0, buffer.Length);
            fs.Close();

            Stream ftpstream = ftp.GetRequestStream();
            ftpstream.Write(buffer, 0, buffer.Length);
            ftpstream.Close();
        }
        catch (Exception ex)
        {
            throw ex;
        }
    }

我不断得到一些错误 “请求的URI对此FTP命令无效” 而第二个错误是 “远程服务器返回错误：（530）未登录。”

Answer 1

因为您正在上传。 FTP网址中需要目标文件名。看起来这就是你打算用以下几行做的事情：

string ftpfullpath = ftpurl;

尝试将其更改为：

string ftpfullpath = ftpurl + filename;

对于未登录的错误，某些托管公司仅允许安全连接。您可以尝试在代码中添加以下行：

ftp.EnableSsl = true;

Answer 2

我正在使用这种方法，而且效果很好：

public static void UpLoadImage(string image, string targeturl)
        {
            FtpWebRequest req = (FtpWebRequest)WebRequest.Create("ftp://www.website.com/images/" + targeturl);
            req.UseBinary = true;
            req.Method = WebRequestMethods.Ftp.UploadFile;
            req.Credentials = new NetworkCredential("user", "pass");
            byte[] fileData = File.ReadAllBytes(image);
            req.ContentLength = fileData.Length;
            Stream reqStream = req.GetRequestStream();
            reqStream.Write(fileData, 0, fileData.Length);
            reqStream.Close();
        }

FTP上传图片

2 个答案: