图像在FTP中损坏，二进制模式打开
本文关键字：二进制 模式 损坏 FTP 图像 | 更新日期: 2023-09-27 18:03:55
我在1月份就这个问题发了一篇帖子，但是这个问题一直没有解决。我一直在做一个程序，把它传到我的Youtube Teams网站上。由于某些奇怪的原因，生成的HTML代码可以正常工作并成功传输，但是图像却损坏了。我已经确保二进制模式设置为true并且权限都是正确的。
有人能帮我吗?
这是代码中与我的问题相关的部分:
namespace TMNGP_FTP
{
partial class Form1
{
// some functions and properties for the form
UriBuilder ftpurl;
String ftpurlstr = "ftp://tmngp.heliohost.org";
static String ftpusername = "*******";
static String ftppassword = "*******";
public static string GenerateFileName(string context)
{
return context + DateTime.Now.ToString("yyyyMMddHHmmss") + ".html";
}
public void openpic_Click(object sender, System.EventArgs e)
{
//Wrap the creation of the OpenFileDialog instance in a using statement,
//Rather than manually calling the dispose method to ensure proper disposal
using (OpenFileDialog dlg = new OpenFileDialog())
{
dlg.Title = "Open Image";
dlg.Filter = "png files (*.png)|*.png";
if (dlg.ShowDialog() == DialogResult.OK)
{
string folderName = @"c:'TMNGP_Web_Files";
string pathString = folderName + @"'htTemp";
pathString = pathString + @"'imgs";
if (!System.IO.Directory.Exists(pathString))
{
System.IO.Directory.CreateDirectory(pathString);
}
string destFileName = pathString + @"'" + dlg.SafeFileName.ToString();
System.IO.File.Copy(dlg.FileName, destFileName, true);
DisplImg.Image = new Bitmap(dlg.OpenFile());
DisplImg.ImageLocation = destFileName;
}
}
}
private FtpClient ftpnew = null;
public void textgen_Click(object sender, System.EventArgs e)
{
string folderName = @"c:'TMNGP_Web_Files";
string pathString = folderName + @"'htTemp";
if (!System.IO.Directory.Exists(pathString))
{
System.IO.Directory.CreateDirectory(pathString);
}
string fileName = GenerateFileName("HT");
pathString = pathString + @"'" + fileName;
Console.WriteLine("Path to my file: {0}'n", pathString);
if (!System.IO.File.Exists(pathString))
{
//System.IO.FileStream fs = System.IO.File.Create(pathString);
using (System.IO.StreamWriter file = new System.IO.StreamWriter(pathString))
{
file.WriteLine("<div class='simple_overlay' id='news_archive/" + DisplImg.ImageLocation.Substring(31) + "' style='display:none;'>");
file.WriteLine("<a class='close'></a>");
file.WriteLine("<img src='news_archive/" + DisplImg.ImageLocation.Substring(31) + "'/>");
file.WriteLine("<div class='details'>");
file.WriteLine("<h3> " + txtTitle.Text + " </h3>");
file.WriteLine("<h4> " + TxtInfo.Text + " </h4>");
file.WriteLine("<p>" + Desctext.Text + "</p>");
file.WriteLine("</div>");
file.WriteLine("</div>");
}
if(radioButton1.Checked)
{
ftpurl = new UriBuilder("ftp", "tmngp.heliohost.org", 21, "NGP/news_archive/");
ftpurlstr = "/public_html/NGP/news_archive";
}
else
{
ftpurl = new UriBuilder("ftp", "tmngp.heliohost.org", 21, "TM/news_archive/");
ftpurlstr = "/public_html/TM/news_archive";
}
try
{
//string filenametwo = System.IO.Path.GetFullPath(@"c:'TMNGP_Web_Files'htTemp'"+fileName);
string filenamethree = System.IO.Path.GetFullPath(DisplImg.ImageLocation.ToString());
Console.WriteLine("{0}", filenamethree);
Console.WriteLine(pathString);
//string ftpfullpath = ftpurl;
FtpWebRequest ftp = (FtpWebRequest)FtpWebRequest.Create((@"ftp://tmngp.heliohost.org" + ftpurlstr + fileName).ToString());
Console.WriteLine("{0}", ftpurl + fileName);
ftp.Credentials = new NetworkCredential(ftpusername, ftppassword);
ftp.KeepAlive = true;
ftp.UseBinary = true;
ftp.Method = WebRequestMethods.Ftp.UploadFile;
StreamReader sourceStreamone = new StreamReader(@"c:'TMNGP_Web_Files'htTemp'" + fileName);
byte[] fileContentsone = Encoding.UTF8.GetBytes(sourceStreamone.ReadToEnd());
sourceStreamone.Close();
ftp.ContentLength = fileContentsone.Length;
Stream requestStreamone = ftp.GetRequestStream();
requestStreamone.Write(fileContentsone, 0, fileContentsone.Length);
requestStreamone.Close();
FtpWebResponse ftpresponseone = (FtpWebResponse)ftp.GetResponse();
Console.WriteLine("Upload File Complete, status {0}", ftpresponseone.StatusDescription);
ftpresponseone.Close();
}
catch (WebException ex)
{
throw ex;
}
try
{
string imgfile = DisplImg.ImageLocation.Substring(31);
FtpWebRequest ftp2 = (FtpWebRequest)FtpWebRequest.Create((@"ftp://tmngp.heliohost.org" + ftpurlstr + imgfile).ToString());
ftp2.Credentials = new NetworkCredential(ftpusername, ftppassword);
ftp2.KeepAlive = true;
ftp2.UseBinary = true;
ftp2.Method = WebRequestMethods.Ftp.UploadFile;
StreamReader sourceStreamtwo = new StreamReader(DisplImg.ImageLocation.ToString());
byte[] fileContentstwo = Encoding.UTF8.GetBytes(sourceStreamtwo.ReadToEnd());
sourceStreamtwo.Close();
ftp2.ContentLength = fileContentstwo.Length;
Stream requestStreamtwo = ftp2.GetRequestStream();
requestStreamtwo.Write(fileContentstwo, 0, fileContentstwo.Length);
requestStreamtwo.Close();
FtpWebResponse ftpresponsetwo = (FtpWebResponse)ftp2.GetResponse();
Console.WriteLine("Upload File Complete, status {0}", ftpresponsetwo.StatusDescription);
ftpresponsetwo.Close();
}
catch (Exception ex)
{
throw ex;
}
MessageBox.Show("FTP Complete");
}
else
{
Console.WriteLine("File '"{0}'" already exists.", fileName);
return;
}
}
// a bunch of Windows Form Designer generated code ...
}
}
Ok，这段代码很难阅读，但是，当您声明Byte[] fileContentTwo时，看起来您正在对图像(sourceStreamTwo)使用Encoding.UTF8.GetBytes()。
编辑 -忘了说，你不需要StreamReader -使用FileStream代替:
FileStream sourceStreamtwo = new FileStream(DisplImg.ImageLocation.ToString(), FileMode.Open);
改为
Byte[] fileContentTwo;
using (BinaryReader br = new BinaryReader(sourceStreamtwo))
{
fileContentsTwo = br.ReadBytes((int)sourceStreamtwo.Length);
// rest of code that deals with sourceStreamTwo
}
注意，这假定您不是从网络中读取，因此您可能没有整个流可用，请参阅从流中创建字节数组
在。net 4或更高版本中，您可以使用Stream.CopyTo()，它更安全，因为它可以处理流中的中断-再次参见上面的问题和回答以获得更多信息。
你应该很好。编码是用于文本的，图像是二进制的。
还请考虑一些不同的命名约定为您的变量:)