一、我需要从服务器下载ppt文件到本地
protected void Btn_DownPPT_Click(object sender, EventArgs e)
{
DBService svc = new DBService();
svc.DownPpts();
string strFileName = "公报.ppt";
string filename = Context.Server.MapPath(Context.Request.ApplicationPath) + "\\Temp\\" + strFileName; //物理地址
if (strFileName != "")
{
string path = Context.Server.MapPath(Context.Request.ApplicationPath) + "\\Temp\\" + strFileName;//物理地址
System.IO.FileInfo file = new System.IO.FileInfo(path);
if (file.Exists)
{
Response.Clear();
Response.AddHeader("Content-Disposition", "attachment; filename=" + file.Name);
Response.AddHeader("Content-Length", file.Length.ToString());
Response.ContentType = "application/octet-stream";
Response.Filter.Close();
Response.WriteFile(file.FullName);
Response.End();
}
else
{
Response.Write("This file does not exist.");
}
}
}
以下转载:http://www.alixixi.com/Dev/Web/ASPNET/aspnet1/2007/2007050633864.html
string filename = "a.txt";
if (filename != "")
{
string path = Server.MapPath(filename);
System.IO.FileInfo file = new System.IO.FileInfo(path);
if (file.Exists)
{
Response.Clear();
Response.AddHeader("Content-Disposition", "attachment; filename=" + file.Name);
Response.AddHeader("Content-Length", file.Length.ToString());
Response.ContentType = "application/octet-stream";
Response.Filter.Close();
Response.WriteFile(file.FullName);
Response.End();
}
else
{
Response.Write("This file does not exist.");
}
}
转载自：http://blog.csdn.net/zlhzhj/article/details/7563762
- 局域网文件下载：
public class RemoteDownload
{
public static void DownLoad(string addressUrl,string localName)
{
//下载文件
System.Net.WebClient myWebClient = new System.Net.WebClient();
myWebClient.DownloadFile(@"/10.2.0.254/software/01279.lic.txt", "testdownload.txt");
//下载end
}
}
通过ＵＲＬ获取页面内容
try
{
// 远程获取目标页面源码
string strTargetHtml = string.Empty;
WebClient wc = new WebClient();
wc.Credentials = CredentialCache.DefaultCredentials;
byte[] btPageData = wc.DownloadData(strTargetUrl + dtTargetDate.ToString("yyyy") + "/" + dtTargetDate.ToString("MM") + "/" + dtTargetDate.ToString("dd") + "/");
strTargetHtml = Encoding.UTF8.GetString(btPageData);
wc.Dispose();
}
catch(Exception exp)
{
_isError = true;
_errorDetail = "获取目标日志文件列表时出错：" + exp.Message;
}
- 通过web方式，从远程服务器端下载文件：
public class WebDownload
{
public static void DownLoad(string Url, string FileName)
{
bool Value = false;
WebResponse response = null;
Stream stream = null;
try
{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);
response = request.GetResponse();
stream = response.GetResponseStream();
if (!response.ContentType.ToLower().StartsWith("text/"))
{
Value = SaveBinaryFile(response, FileName);
}
}
catch (Exception err)
{
string aa = err.ToString();
}
}
/// <summary>
/// Save a binary file to disk.
/// </summary>
/// <param name="response">The response used to save the file</param>
// 将二进制文件保存到磁盘
private static bool SaveBinaryFile(WebResponse response, string FileName)
{
bool Value = true;
byte[] buffer = new byte[1024];
try
{
if (File.Exists(FileName))
File.Delete(FileName);
Stream outStream = System.IO.File.Create(FileName);
Stream inStream = response.GetResponseStream();
int l;
do
{
l = inStream.Read(buffer, 0, buffer.Length);
if (l > 0)
outStream.Write(buffer, 0, l);
}
while (l > 0);
outStream.Close();
inStream.Close();
}
catch
{
Value = false;
}
return Value;
}
- 从FTP上下载文件：
public class FtpDownload
{
public static void DownLoad(string FtpPath)
{
/*首先从配置文件读取ftp的登录信息*/
string TempFolderPath = System.Configuration.ConfigurationManager.AppSettings["TempFolderPath"].ToString();
string FtpUserName = System.Configuration.ConfigurationManager.AppSettings["FtpUserName"].ToString();
string FtpPassWord = System.Configuration.ConfigurationManager.AppSettings["FtpPassWord"].ToString();
string LocalFileExistsOperation = System.Configuration.ConfigurationManager.AppSettings["LocalFileExistsOperation"].ToString();
Uri uri = new Uri(FtpPath);
string FileName = Path.GetFullPath(TempFolderPath) + Path.DirectorySeparatorChar.ToString() + Path.GetFileName(uri.LocalPath);
//创建一个文件流
FileStream fs = null;
Stream responseStream = null;
try
{
//创建一个与FTP服务器联系的FtpWebRequest对象
FtpWebRequest request = (FtpWebRequest)WebRequest.Create(uri);
//设置请求的方法是FTP文件下载
request.Method = WebRequestMethods.Ftp.DownloadFile;
//连接登录FTP服务器
request.Credentials = new NetworkCredential(FtpUserName, FtpPassWord);
//获取一个请求响应对象
FtpWebResponse response = (FtpWebResponse)request.GetResponse();
//获取请求的响应流
responseStream = response.GetResponseStream();
//判断本地文件是否存在，如果存在，则打开和重写本地文件
if (File.Exists(FileName))
{
if (LocalFileExistsOperation == "write")
{
fs = File.Open(FileName, FileMode.Open, FileAccess.ReadWrite);
}
}
//判断本地文件是否存在，如果不存在，则创建本地文件
else
{
fs = File.Create(FileName);
}
if (fs != null)
{
int buffer_count = 65536;
byte[] buffer = new byte[buffer_count];
int size = 0;
while ((size = responseStream.Read(buffer, 0, buffer_count)) > 0)
{
fs.Write(buffer, 0, size);
}
fs.Flush();
fs.Close();
responseStream.Close();
}
}
finally
{
if (fs != null)
fs.Close();
if (responseStream != null)
responseStream.Close();
}
}
}
asp.net从服务器（指定文件夹）下载任意格式的文件到本地