以下程序在.NET2005，系统XP中测试通过：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using https://www.doczj.com/doc/3e5570727.html,;
using System.IO;
namespace https://www.doczj.com/doc/3e5570727.html,
{
class UpDownLoadFile
{
///
/// WebClient上传文件至服务器（不带进度条）
///
/// 要上传的文件（全路径格式）
/// Web服务器文件夹路径
///
public bool UpLoadFile(string fileNameFullPath, string strUrlDirPath)
{
//得到要上传的文件文件名
string fileName = fileNameFullPath.Substring(https://www.doczj.com/doc/3e5570727.html,stIndexOf("\\") + 1);
//新文件名由年月日时分秒及毫秒组成
string NewFileName = DateTime.Now.ToString("yyyyMMddhhmmss")
+ https://www.doczj.com/doc/3e5570727.html,lisecond.ToString()
+ fileNameFullPath.Substring(https://www.doczj.com/doc/3e5570727.html,stIndexOf("."));
//得到文件扩展名
string fileNameExt = fileName.Substring(https://www.doczj.com/doc/3e5570727.html,stIndexOf(".") + 1);
if (strUrlDirPath.EndsWith("/") == false) strUrlDirPath = strUrlDirPath + "/";
//保存在服务器上时，将文件改名（示业务需要）
strUrlDirPath = strUrlDirPath + NewFileName;
// 创建WebClient实例
WebClient myWebClient = new WebClient();
myWebClient.Credentials = CredentialCache.DefaultCredentials;
// 将要上传的文件打开读进文件流
FileStream myFileStream = new FileStream(fileNameFullPath, FileMode.Open, FileAccess.Read);
BinaryReader myBinaryReader = new BinaryReader(myFileStream);
try
{
byte[] postArray = myBinaryReader.ReadBytes((int)myFileStream.Length);
//打开远程Web地址，将文件流写入
Stream postStream = myWebClient.OpenWrite(strUrlDirPath, "PUT");
if (postStream.CanWrite)
{
postStream.Write(postArray, 0, postArray.Length);
}
else
{
//MessageBox.Show("Web服务器文件目前不可写入，请检查Web服务器目录权限设置！","系统提示",MessageBoxButtons.OK,https://www.doczj.com/doc/3e5570727.html,rmation);
}
postStream.Close();//关闭流
return true;
}
catch (Exception exp)
{
//MessageBox.Show("文件上传失败：" + exp.Message, "系统提示", MessageBoxButtons.OK, https://www.doczj.com/doc/3e5570727.html,rmation);
return false;
}
}
///
/// 下载服务器文件至客户端（不带进度条）
///
/// 要下载的Web服务器上的文件地址（全路径如：
https://www.doczj.com/doc/3e5570727.html,/test.rar）
/// 下载到的目录（存放位置，机地机器文件夹）
///
public bool DownLoadFile(string strUrlFilePath, string strLocalDirPath)
{
// 创建WebClient实例
WebClient client = new WebClient();
//被下载的文件名
string fileName = strUrlFilePath.Substring(https://www.doczj.com/doc/3e5570727.html,stIndexOf("/"));
//另存为的绝对路径＋文件名
string Path = strLocalDirPath + fileName;
try
{
WebRequest myWebRequest = WebRequest.Create(strUrlFilePath);
}
catch (Exception exp)
{
MessageBox.Show("文件下载失败：" + exp.Message, "系统提示", MessageBoxButtons.OK, https://www.doczj.com/doc/3e5570727.html,rmation);
}
{
client.DownloadFile(strUrlFilePath, Path);
return true;
}
catch (Exception exp)
{
MessageBox.Show("文件下载失败：" + exp.Message, "系统提示", MessageBoxButtons.OK, https://www.doczj.com/doc/3e5570727.html,rmation);
return false;
}
}
///
/// 下载带进度条代码（普通进度条）
///
/// 网址
/// 文件名
/// 普通进度条ProgressBar
///
public bool DownLoadFile(string URL, string Filename, ProgressBar Prog)
{
try
{
https://www.doczj.com/doc/3e5570727.html,.HttpWebRequest Myrq =
(https://www.doczj.com/doc/3e5570727.html,.HttpWebRequest)https://www.doczj.com/doc/3e5570727.html,.HttpWebRequest.Create(URL); //从URL地址得到一个WEB请求https://www.doczj.com/doc/3e5570727.html,.HttpWebResponse myrp = (https://www.doczj.com/doc/3e5570727.html,.HttpWebResponse)Myrq.GetResponse(); //从WEB 请求得到WEB响应
long totalBytes = myrp.ContentLength; //从WEB响应得到总字节数
Prog.Maximum = (int)totalBytes; //从总字节数得到进度条的最大值
System.IO.Stream st = myrp.GetResponseStream(); //从WEB请求创建流（读）
System.IO.Stream so = new System.IO.FileStream(Filename, System.IO.FileMode.Create); //创建文件流（写）
long totalDownloadedByte = 0; //下载文件大小
byte[] by = new byte[1024];
int osize = st.Read(by, 0, (int)by.Length); //读流
while (osize > 0)
{
totalDownloadedByte = osize + totalDownloadedByte; //更新文件大小
Application.DoEvents();
so.Write(by, 0, osize); //写流
Prog.Value = (int)totalDownloadedByte; //更新进度条
osize = st.Read(by, 0, (int)by.Length); //读流
so.Close(); //关闭流
st.Close(); //关闭流
return true;
}
catch
{
return false;
}
}
///
/// 下载带进度条代码(状态栏式进度条）
///
/// 网址
/// 文件名
/// 状态栏式进度条ToolStripProgressBar
///
public bool DownLoadFile(string URL, string Filename, ToolStripProgressBar Prog)
{
try
{
https://www.doczj.com/doc/3e5570727.html,.HttpWebRequest Myrq =
(https://www.doczj.com/doc/3e5570727.html,.HttpWebRequest)https://www.doczj.com/doc/3e5570727.html,.HttpWebRequest.Create(URL); //从URL地址得到一个WEB请求https://www.doczj.com/doc/3e5570727.html,.HttpWebResponse myrp = (https://www.doczj.com/doc/3e5570727.html,.HttpWebResponse)Myrq.GetResponse(); //从WEB 请求得到WEB响应
long totalBytes = myrp.ContentLength; //从WEB响应得到总字节数
Prog.Maximum = (int)totalBytes; //从总字节数得到进度条的最大值
System.IO.Stream st = myrp.GetResponseStream(); //从WEB请求创建流（读）
System.IO.Stream so = new System.IO.FileStream(Filename, System.IO.FileMode.Create); //创建文件流（写）
long totalDownloadedByte = 0; //下载文件大小
byte[] by = new byte[1024];
int osize = st.Read(by, 0, (int)by.Length); //读流
while (osize > 0)
{
totalDownloadedByte = osize + totalDownloadedByte; //更新文件大小
Application.DoEvents();
so.Write(by, 0, osize); //写流
Prog.Value = (int)totalDownloadedByte; //更新进度条
osize = st.Read(by, 0, (int)by.Length); //读流
}
so.Close(); //关闭流
st.Close(); //关闭流
return true;
}
catch
{
return false;
}
}
}
}