1.文件下载到客户端

//WriteFile实现下载

protected void Download_Click(object sender, EventArgs e)

{

　　string fileName = "20151223Test.doc";//客户端保存的文件名

　　//string filePath = Server.MapPath("DownLoad/aaa.txt");//路径

　　string filePath = Server.MapPath(@"files\test.doc");//路径

　　FileInfo fileInfo = new FileInfo(filePath);

　　Response.Clear();

　　Response.ClearContent();

　　Response.ClearHeaders();

　　Response.AddHeader("Content-Disposition", "attachment;filename=" + fileName);

　　Response.AddHeader("Content-Length", fileInfo.Length.ToString());

　　Response.AddHeader("Content-Transfer-Encoding", "binary");

　　Response.ContentType = "application/octet-stream";

　　//Response.ContentEncoding = System.Text.Encoding.GetEncoding("gb2312");

　　Response.ContentEncoding = System.Text.Encoding.UTF8;

　　Response.WriteFile(fileInfo.FullName);

　　Response.Flush();

　　Response.End();

}

//TransmitFile实现下载

protected void DownLoadTF_Click(object sender, EventArgs e)

{

　　Response.ContentType = "application/x-zip-compressed";

　　Response.AddHeader("Content-Disposition", "attachment;filename=z.zip");

　　string filename = Server.MapPath(@"files\DownloadsText.zip");

　　Response.TransmitFile(filename);

　　//Response.TransmitFile 需要 ：Microsoft .NET Framework 1.1 Service Pack 1 支持！！

}

 

//流方式下载

protected void DownLoadFL_Click(object sender, EventArgs e)

{

　　string fileName = "20151223aaa.doc";//客户端保存的文件名

　　//string filePath = Server.MapPath("DownLoad/aaa.txt");//路径

　　string filePath = Server.MapPath(@"files\租户装修手册-印象城.doc");//路径

　　//以字符流的形式下载文件

　　using (FileStream fs = new FileStream(filePath, FileMode.Open))

　　{

　　　　byte[] bytes = new byte[(int)fs.Length];

　　　　fs.Read(bytes, 0, bytes.Length);

　　　　Response.ContentType = "application/octet-stream";

　　　　//通知浏览器下载文件而不是打开

　　　　Response.AddHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode(fileName, System.Text.Encoding.UTF8));

　　　　Response.BinaryWrite(bytes);

　　　　Response.Flush();

　　　　Response.End();

　　}

}

 

//流方式下载 2

protected void DownLoadFL2_Click(object sender, EventArgs e)

{

　　string fileName = "20151223aaa.doc";//客户端保存的文件名

　　//string filePath = Server.MapPath("DownLoad/aaa.txt");//路径

　　string filePath = Server.MapPath(@"files\租户装修手册-印象城.doc");//路径

　　//以字符流的形式下载文件

　　using (FileStream fs = new FileStream(filePath, FileMode.OpenOrCreate, FileAccess.ReadWrite))

　　{

　　　　byte[] bytes = new byte[(int)fs.Length];

　　　　using (BinaryWriter bw = new BinaryWriter(fs))

　　　　{

　　　　　　bw.Write(bytes);

　　　　　　bw.Close();

　　　　　　Response.ContentType = "application/octet-stream";

　　　　　　//通知浏览器下载文件而不是打开

　　　　　　Response.AddHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode(fileName, System.Text.Encoding.UTF8));

　　　　　　Response.BinaryWrite(bytes);

　　　　　　Response.Flush();

　　　　　　Response.End();

　　　　}

　　}

}

 //http请求常用下载方式；

//通过webClient方式

WebClient client = new WebClient();

string url="http://down6.3987.com:801/2010/office_3987.com.zip";

Stream strm = client.OpenRead("http://down6.3987.com:801/2010/office_3987.com.zip");

string filename=url.Substring(url.LastIndexOf('/')+1);

int count = 0;

byte[] buffer = new byte[4096];

FileStream fs = new FileStream(Application.StartupPath+"//"+filename, FileMode.Create);

while ((count = strm.Read(buffer, 0, buffer.Length)) > 0) {

fs.Write(buffer, 0, count);

}

fs.Close();

strm.Close();

strm.Dispose();

fs.Dispose();

 

//通过原生态HttpWebrequest方式

string url = "http://down6.3987.com:801/2010/office_3987.com.zip";

string filename = url.Substring(url.LastIndexOf('/') + 1);

//用webClient方式创建http请求

HttpWebRequest req =(HttpWebRequest)HttpWebRequest.Create(url) ; //创建链接

//获取服务其数据

HttpWebResponse res = (HttpWebResponse)req.GetResponse();

Stream mystream = res.GetResponseStream();

//开始文件操作

FileStream fs = new FileStream(AppDomain.CurrentDomain.BaseDirectory+"//"+filename, FileMode.Create, FileAccess.Write, FileShare.None);

byte[] buffer=new byte[1024];

int count=0;

while((count=mystream.Read(buffer,0,1024))>0)

{

fs.Write(buffer, 0, count);

}

fs.Close();

mystream.Close();

fs.Dispose();

 

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