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asp.net实现ftp上传代码(解决大文件上传问题)

2014-12-24 17:18 886 查看
usingSystem;
usingSystem.Configuration;
usingSystem.Data;
usingSystem.Linq;
usingSystem.Web;
usingSystem.Web.Security;
usingSystem.Web.UI;
usingSystem.Web.UI.HtmlControls;
usingSystem.Web.UI.WebControls;
usingSystem.Web.UI.WebControls.WebParts;
usingSystem.Xml.Linq;
usingSystem.IO;
usingSystem.Net;
usingSystem.Text;

publicpartial class _Default : System.Web.UI.Page
{
//以下字段配置在web.config
privatestring ftpServerIP = "127.0.0.1";//服务器ip
privatestring ftpUserID = "FTPTEST";//用户名FTPTEST
privatestring ftpPassword = "ftptest";//密码
protectedvoid Page_Load(objectsender, EventArgs e)
{

if(MyFile.Value != "")
{
//string a = MyFile.;
}

}

//ftp的上传功能
privatevoid Upload(stringfilename)
{
FileInfo fileInf = newFileInfo(filename);

stringuri = "ftp://"+ ftpServerIP + "/"+ fileInf.Name;
FtpWebRequest reqFTP;

// 根据uri创建FtpWebRequest对象
reqFTP = (FtpWebRequest)FtpWebRequest.Create(newUri("ftp://"+ ftpServerIP + "/"+ fileInf.Name));

// ftp用户名和密码
reqFTP.Credentials = newNetworkCredential(ftpUserID, ftpPassword);

// 默认为true,连接不会被关闭
// 在一个命令之后被执行
reqFTP.KeepAlive = false;

// 指定执行什么命令
reqFTP.Method = WebRequestMethods.Ftp.UploadFile;

// 指定数据传输类型
reqFTP.UseBinary = true;

// 上传文件时通知服务器文件的大小
reqFTP.ContentLength = fileInf.Length;

// 缓冲大小设置为2kb
intbuffLength = 2048;

byte[] buff = newbyte[buffLength];
intcontentLen;

// 打开一个文件流 (System.IO.FileStream) 去读上传的文件
FileStream fs = fileInf.OpenRead();
try
{
// 把上传的文件写入流
Stream strm = reqFTP.GetRequestStream();

// 每次读文件流的2kb
contentLen = fs.Read(buff, 0, buffLength);

// 流内容没有结束
while(contentLen != 0)
{
// 把内容从file stream 写入 upload stream
strm.Write(buff, 0, contentLen);

contentLen = fs.Read(buff, 0, buffLength);
}

// 关闭两个流
strm.Close();
fs.Close();
this.Page.RegisterStartupScript("", "<script>alert('成功')</script>");
}
catch(Exception ex)
{
// MessageBox.Show(ex.Message, "Upload Error");
Response.Write("Upload Error:" + ex.Message);
}
}

//从ftp服务器上下载文件的功能
privatevoid Download(stringfilePath, stringfileName)
{
FtpWebRequest reqFTP;

try
{
FileStream outputStream = newFileStream(filePath + "\\"+ fileName, FileMode.Create);

reqFTP = (FtpWebRequest)FtpWebRequest.Create(newUri("ftp://"+ ftpServerIP + "/"+ fileName));

reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;

reqFTP.UseBinary = true;

reqFTP.Credentials = newNetworkCredential(ftpUserID, ftpPassword);

FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();

Stream ftpStream = response.GetResponseStream();

longcl = response.ContentLength;

intbufferSize = 2048;

intreadCount;

byte[] buffer = newbyte[bufferSize];

readCount = ftpStream.Read(buffer, 0, bufferSize);

while(readCount > 0)
{
outputStream.Write(buffer, 0, readCount);

readCount = ftpStream.Read(buffer, 0, bufferSize);
}

ftpStream.Close();

outputStream.Close();

response.Close();
}
catch(Exception ex)
{
Response.Write("Download Error:" + ex.Message);
}
}

//从ftp服务器上获得文件列表
publicstring[] GetFileList()
{
string[] downloadFiles;
StringBuilder result = newStringBuilder();
FtpWebRequest reqFTP;
// HttpWebRequest reqFTP;
try
{
reqFTP = (FtpWebRequest)FtpWebRequest.Create(newUri("ftp://"+ ftpServerIP + "/"));
reqFTP.UseBinary = true;
reqFTP.Credentials = newNetworkCredential(ftpUserID, ftpPassword);
reqFTP.Method = WebRequestMethods.Ftp.ListDirectory;
WebResponse response = reqFTP.GetResponse();
StreamReader reader = newStreamReader(response.GetResponseStream());
stringline = reader.ReadLine();
while(line != null)
{
result.Append(line);
result.Append("\n");
line = reader.ReadLine();
}
// to remove the trailing '\n'
result.Remove(result.ToString().LastIndexOf('\n'), 1);
reader.Close();
response.Close();
returnresult.ToString().Split('\n');
}
catch(Exception ex)
{
downloadFiles = null;
returndownloadFiles;
}
}

protectedvoid Button1_Click(objectsender, EventArgs e)
{
Upload("F:\\美国队长DVD中字.rmvb");
}
protectedvoid Button2_Click(objectsender, EventArgs e)
{

}
}
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