[英]Upload a file with encoding using FTP in C#
以下代碼適用於上傳文本文件,但無法上傳JPEG文件(不完全 - 文件名很好但圖像已損壞):
private void up(string sourceFile, string targetFile)
{
try
{
string ftpServerIP = ConfigurationManager.AppSettings["ftpIP"];
string ftpUserID = ConfigurationManager.AppSettings["ftpUser"];
string ftpPassword = ConfigurationManager.AppSettings["ftpPass"];
//string ftpURI = "";
string filename = "ftp://" + ftpServerIP + "//" + targetFile;
FtpWebRequest ftpReq = (FtpWebRequest)WebRequest.Create(filename);
ftpReq.Method = WebRequestMethods.Ftp.UploadFile;
ftpReq.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
StreamReader stream = new StreamReader(sourceFile);
Byte[] b = System.Text.Encoding.UTF8.GetBytes(stream.ReadToEnd());
stream.Close();
ftpReq.ContentLength = b.Length;
Stream s = ftpReq.GetRequestStream();
s.Write(b, 0, b.Length);
s.Close();
System.Net.FtpWebResponse ftpResp = (FtpWebResponse)ftpReq.GetResponse();
MessageBox.Show(ftpResp.StatusDescription);
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}
}
我有另一個可以上傳文件的解決方案:
private void Upload(string sourceFile, string targetFile)
{
string ftpUserID;
string ftpPassword;
string ftpServerIP;
ftpServerIP = ConfigurationManager.AppSettings["ftpIP"];
ftpUserID = ConfigurationManager.AppSettings["ftpUser"];
ftpPassword = ConfigurationManager.AppSettings["ftpPass"];
FileInfo fileInf = new FileInfo(sourceFile);
FtpWebRequest reqFTP;
// Create FtpWebRequest object from the Uri provided
reqFTP = (FtpWebRequest)(FtpWebRequest.Create(new Uri("ftp://" + ftpServerIP + "//" + targetFile)));
// Provide the WebPermission Credintials
reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
// Bypass default lan settings
reqFTP.Proxy = null;
// By default KeepAlive is true, where the control connection is not closed
// after a command is executed.
reqFTP.KeepAlive = false;
// Specify the command to be executed.
reqFTP.Method = WebRequestMethods.Ftp.UploadFile;
// Specify the data transfer type.
reqFTP.UseBinary = true;
// Notify the server about the size of the uploaded file
reqFTP.ContentLength = fileInf.Length;
// The buffer size is set to 2kb
int buffLength = 2048;
Byte[] buff;
buff = new byte[buffLength];
int contentLen;
// Opens a file stream (System.IO.FileStream) to read the file to be uploaded
FileStream fs = fileInf.OpenRead();
try
{
// Stream to which the file to be upload is written
Stream strm = reqFTP.GetRequestStream();
// Read from the file stream 2kb at a time
long filesize = fs.Length;
int i=0;
contentLen = fs.Read(buff, 0, buffLength);
// Till Stream content ends
while (contentLen != 0)
{
Application.DoEvents();
// Write Content from the file stream to the FTP Upload Stream
strm.Write(buff, 0, contentLen);
contentLen = fs.Read(buff, 0, buffLength);
i = i + 1;
//Double percentComp = (i * buffLength) * 100 / filesize;
//ProgressBar1.Value = (int)percentComp;
}
// Close the file stream and the Request Stream
strm.Close();
fs.Close();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Upload Error");
}
}
但在這里我有相反的問題 - 圖片很好,但文件名已損壞。
我知道這是因為編碼,但我不知道如何使字節數組具有所需的編碼...
試試這個:
private static void up(string sourceFile, string targetFile)
{
try
{
string ftpServerIP = ConfigurationManager.AppSettings["ftpIP"];
string ftpUserID = ConfigurationManager.AppSettings["ftpUser"];
string ftpPassword = ConfigurationManager.AppSettings["ftpPass"];
////string ftpURI = "";
string filename = "ftp://" + ftpServerIP + "//" + targetFile;
FtpWebRequest ftpReq = (FtpWebRequest)WebRequest.Create(filename);
ftpReq.UseBinary = true;
ftpReq.Method = WebRequestMethods.Ftp.UploadFile;
ftpReq.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
byte[] b = File.ReadAllBytes(sourceFile);
ftpReq.ContentLength = b.Length;
using (Stream s = ftpReq.GetRequestStream())
{
s.Write(b, 0, b.Length);
}
FtpWebResponse ftpResp = (FtpWebResponse)ftpReq.GetResponse();
if (ftpResp != null)
{
MessageBox.Show(ftpResp.StatusDescription);
}
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}
}
您應該使用Stream
來讀取二進制文件,而不是StreamReader
。 StreamReader
僅用於讀取文本文件。
在您的第一個代碼示例中,啟用二進制傳輸: FtpWebRequest.UseBinary = true
。 否則它將轉換它認為是各種平台約定之間的文本行結尾(但實際上是圖像的一部分)。
你的第二個片段以正確的方式完成。 它使用FileStream,而不是StreamReader。 StreamReader僅適用於文本文件。
如果您遇到此問題: 使用HTTP時不支持請求的FTP命令
你需要在Null或Nothing中設置代理。
ftpReq.Proxy = null;
你可以看到這個博客。
謝謝。
System.Text.Encoding.UTF8.GetBytes(stream.ReadToEnd());
除非您的信息流的內容是文字,否則請勿這樣做。 將函數更改為接受布爾參數“binary”,如果設置了該標志,則使用后者的工作方法。
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