winform上传文件有两种方式
1种用FTP。这个方式比较推荐的方式。只是复杂一点。需要架设FTP服务器。还必须FTP好多API要了解。 但是功能比较强大。在客户端能操作服务器上任何文件，可以新建文件夹。
2用WebClient控件 服务器用ASP.NET或者JSP方式。其实就是我们常用的HTML浏览本地文件然后上传的功能。只不过客户端用一个控件代替了。但是服务器端还必须要ASP.Net页面来接收这个文件。这个方式客户端不能实现文件管理。文件管理都必须在服务器的ASP.NET页面里面来做管理。
3还一个方式是HttpWebRequest.但是这个方式的原理还是WebClient。还是直接推荐用WebClient。不推荐用HttpWebRequest
1：FTP方式。通过在IIS里架设FTP服务器。代码
using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
using System.Text;
namespace FtpCom
{
/// <summary>
/// FTP文件上传、下载帮助类
/// </summary>
class FtpHelper
{
#region 变量
private string ftpServerIP; //ftpIP地址
private string ftpUserID; //ftp用户名
private string ftpPassword; //ftp密码
private FtpWebRequest reqFTP; //ftpweb服务
#endregion
#region 属性
/// <summary>
/// ftpIP地址
/// </summary>
public string FtpServerIP
{
get { return ftpServerIP; }
set { ftpServerIP = value; }
}
/// <summary>
/// ftp用户名
/// </summary>
public string FtpUserID
{
get { return ftpUserID; }
set { ftpUserID = value; }
}
/// <summary>
/// ftp密码
/// </summary>
public string FtpPassword
{
get { return ftpPassword; }
set { ftpPassword = value; }
}
#endregion
#region 构造方法
/// <summary>
/// 构造方法
/// </summary>
/// <param name="ftpServerIP">ftpIP地址</param>
/// <param name="ftpUserID">ftp用户名</param>
/// <param name="ftpPassword">ftp密码</param>
public FtpHelper(string ftpServerIP, string ftpUserID, string ftpPassword)
{
this.ftpServerIP = ftpServerIP;
this.ftpUserID = ftpUserID;
this.ftpPassword = ftpPassword;
}
#endregion
#region 连接
/// <summary>
/// 连接FTP
/// </summary>
/// <param name="path">路径</param>
private void Connect(String path)
{
// 根据uri创建FtpWebRequest对象
reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(path));
// 指定数据传输类型
reqFTP.UseBinary = true;
// ftp用户名和密码
reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
}
#endregion
#region 从ftp服务器上获得文件列表
/// <summary>
/// 从ftp服务器上获得文件列表
/// </summary>
/// <returns></returns>
public string[] GetFileList()
{
return GetFileList("ftp://" + ftpServerIP + "/", WebRequestMethods.Ftp.ListDirectory);
}
/// <summary>
/// 从ftp服务器上获得文件列表
/// </summary>
/// <param name="path">路径</param>
/// <returns></returns>
public string[] GetFileList(string path)
{
return GetFileList("ftp://" + ftpServerIP + "/" + path, WebRequestMethods.Ftp.ListDirectory);
}
/// <summary>
/// 从ftp服务器上获得文件列表
/// </summary>
/// <param name="path">路径</param>
/// <param name="WRMethods">文件操作类型</param>
/// <returns></returns>
private string[] GetFileList(string path, string WRMethods)
{
string[] downloadFiles;
StringBuilder result = new StringBuilder();
try
{
Connect(path);
reqFTP.Method = WRMethods;
WebResponse response = reqFTP.GetResponse();
StreamReader reader = new StreamReader(response.GetResponseStream(), System.Text.Encoding.Default);//中文文件名
string line = 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();
return result.ToString().Split('\n');
}
catch (Exception ex)
{
//MessageBox.Show(ex.Message);
downloadFiles = null;
return downloadFiles;
}
}
#endregion
#region 上传下载
/// <summary>
/// 上传文件到FTP
/// </summary>
/// <param name="filename">文件名称</param>
/// <returns></returns>
public string Upload(string filename)
{
string strResult = string.Empty;
Stream strm = null;
FileInfo fileInf = new FileInfo(filename);
string uri = "ftp://" + ftpServerIP + "/" + fileInf.Name;
Connect(uri);//连接
// 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;
// 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kb
int buffLength = 2048;
byte[] buff = new byte[buffLength];
int contentLen;
// 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
strm = reqFTP.GetRequestStream();
// 每次读文件流的kb
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);
}
}
catch (Exception ex)
{
strResult = "Upload Error" + ex.Message;
}
finally
{
// 关闭两个流
strm.Close();
fs.Close();
}
return strResult;
}
/// <summary>
/// 从ftp服务器下载文件
/// </summary>
/// <param name="filePath">路径</param>
/// <param name="fileName">名称</param>
/// <returns></returns>
public string Download(string filePath, string fileName)
{
try
{
String onlyFileName = Path.GetFileName(fileName);
string newFileName = filePath + "//" + onlyFileName;
if (File.Exists(newFileName))
{
return "本地文件" + newFileName + "已存在,无法下载";
}
string url = "ftp://" + ftpServerIP + "/" + fileName;
Connect(url);//连接
reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
Stream ftpStream = response.GetResponseStream();
long cl = response.ContentLength;
int bufferSize = 2048;
int readCount;
byte[] buffer = new byte[bufferSize];
readCount = ftpStream.Read(buffer, 0, bufferSize);
FileStream outputStream = new FileStream(newFileName, FileMode.Create);
while (readCount > 0)
{
outputStream.Write(buffer, 0, readCount);
readCount = ftpStream.Read(buffer, 0, bufferSize);
}
ftpStream.Close();
outputStream.Close();
response.Close();
return "";
}
catch (Exception ex)
{
return "因" + ex.Message + ",无法下载";
}
}
#endregion
#region 文件及目录操作
/// <summary>
/// 删除文件
/// </summary>
/// <param name="fileName">名称</param>
public void DeleteFileName(string fileName)
{
try
{
FileInfo fileInf = new FileInfo(fileName);
string uri = "ftp://" + ftpServerIP + "/" + fileInf.Name;
Connect(uri);//连接
// 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.DeleteFile;
FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
response.Close();
}
catch (Exception ex)
{
//MessageBox.Show(ex.Message, "删除错误");
}
}
/// <summary>
/// 创建目录
/// </summary>
/// <param name="dirName">目录名称</param>
/// <returns></returns>
public string MakeDir(string dirName)
{
try
{
string uri = "ftp://" + ftpServerIP + "/" + dirName;
Connect(uri);//连接
reqFTP.Method = WebRequestMethods.Ftp.MakeDirectory;
FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
response.Close();
return "";
}
catch (WebException ex)
{
return "[Make Dir]" + ex.Message;
}
}
/// <summary>
/// 删除目录
/// </summary>
/// <param name="dirName">目录名称</param>
public void delDir(string dirName)
{
try
{
string uri = "ftp://" + ftpServerIP + "/" + dirName;
Connect(uri);//连接
reqFTP.Method = WebRequestMethods.Ftp.RemoveDirectory;
FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
response.Close();
}
catch (Exception ex)
{
//MessageBox.Show(ex.Message);
}
}
/// <summary>
/// 获得文件大小
/// </summary>
/// <param name="filename">名称</param>
/// <returns></returns>
public long GetFileSize(string filename)
{
long fileSize = 0;
try
{
FileInfo fileInf = new FileInfo(filename);
string uri = "ftp://" + ftpServerIP + "/" + fileInf.Name;
Connect(uri);//连接
reqFTP.Method = WebRequestMethods.Ftp.GetFileSize;
FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
fileSize = response.ContentLength;
response.Close();
}
catch (Exception ex)
{
//MessageBox.Show(ex.Message);
}
return fileSize;
}
/// <summary>
/// 文件改名
/// </summary>
/// <param name="currentFilename">旧名称</param>
/// <param name="newFilename">新名称</param>
public void Rename(string currentFilename, string newFilename)
{
try
{
FileInfo fileInf = new FileInfo(currentFilename);
string uri = "ftp://" + ftpServerIP + "/" + fileInf.Name;
Connect(uri);//连接
reqFTP.Method = WebRequestMethods.Ftp.Rename;
reqFTP.RenameTo = newFilename;
FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
//Stream ftpStream = response.GetResponseStream();
//ftpStream.Close();
response.Close();
}
catch (Exception ex)
{
//MessageBox.Show(ex.Message);
}
}
#endregion
#region 获取文件信息
/// <summary>
/// 获得文件明晰
/// </summary>
/// <returns></returns>
public string[] GetFilesDetailList()
{
return GetFileList("ftp://" + ftpServerIP + "/", WebRequestMethods.Ftp.ListDirectoryDetails);
}
/// <summary>
/// 获得文件明晰
/// </summary>
/// <param name="path"></param>
/// <returns></returns>
public string[] GetFilesDetailList(string path)
{
return GetFileList("ftp://" + ftpServerIP + "/" + path, WebRequestMethods.Ftp.ListDirectoryDetails);
}
#endregion
}
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