请教一个文件下载的问题！！！

Question

在服务器端有一个文件，我想实现在客户端单击一下按钮，就直接打开下载这个文件的下载框，不知在按钮中应该写什么语句，请高手赐教？？

Answer 1

private void Button1_Click(object sender, System.EventArgs e)
{

Response.Redirect("http://www.www.ww/aa.exe");

}

Answer 2

strFilePath //文件路径
strFileName //下载显示文件名Response.Clear();
strFileName = DateTime.Now.ToString("yyyyMMddHHmmss")+Path.GetExtension(strFilePath);
Response.AppendHeader("Content-Disposition","attachment;filename="+strFileName); 
Response.WriteFile(strFilePath);
Response.End();

Answer 3

Response.AppendHeader("Content-Disposition","attachment;filename="+strFileName); 

Answer 4

Response.Clear();
strFileName =HttpUtility.UrlEncode(reader["Name"].ToString(),System.Text.Encoding.UTF8);
strFilePath=System.Web.HttpContext.Current.Request.MapPath("UpFiles/")+Request.QueryString["ID"].ToString()+"."+reader["Type"].ToString();
Response.AppendHeader("Content-Disposition","attachment;filename="+strFileName); 
Response.WriteFile(strFilePath);
Response.End();

Answer 5

/// <summary>
/// 文件下载
/// </summary>
/// <param name="FullFileName"></param>
private void FileDownload(string FullFileName)
{
FileInfo DownloadFile = new FileInfo(FullFileName); 
Response.Clear();
Response.ClearHeaders();
Response.Buffer=false;
Response.ContentType="application/octet-stream";
Response.AppendHeader("Content-Disposition","attachment;filename=" HttpUtility.UrlEncode(DownloadFile.FullName,System.Text.Encoding.UTF8));
Response.AppendHeader("Content-Length",DownloadFile.Length.ToString());
Response.WriteFile(DownloadFile.FullName);
Response.Flush();
Response.End();
}

Answer 6

不需要写在按钮里面，写在HTML中就行了

Answer 7

<a id="id" hrft=".../download/filename.rar" target="">filename</a>
以上就OK了,download是文件夹。

Answer 8

Response.Clear();
Response.AddHeader("Content-Dispositon","attechment:filename="+file.Name);
Response.AddHeader("Content-Length",file.Length.ToString());
Response.ContentType ="applicaiton/octet-stream";
Response.WriteFile(file.FullName);
Response.End();

Answer 9

//出现保存或者打开的框
if(!System.IO.File.Exists(strFile))
{
Response.Write("<script language='javascript'>alert('对不起，文件不存在！');</script>");
return;
}
Response.Clear();
Response.ClearHeaders();
Response.Charset = "GB2312";
Response.ContentEncoding =System.Text.Encoding.UTF8;
Response.ContentType = "application/octet-stream"; 
FileInfo fi=new FileInfo(strFile);
Response.AddHeader("Content-Disposition","attachment;  filename="  +  HttpUtility.UrlEncode(fi.Name)) ;
Response.AddHeader("Content-Length",fi.Length.ToString());
byte[] tmpbyte=new byte[1024*8];
FileStream fs=fi.OpenRead();
int count;
while((count=fs.Read(tmpbyte,0,tmpbyte.Length))>0)
{
Response.BinaryWrite(tmpbyte);
Response.Flush();
}
fs.Close();
Response.End();//将文件直接显示在浏览器中
string strFile="F:\\a.doc";
Response.Clear();
Response.ClearHeaders();
Response.Charset = "GB2312";
Response.ContentEncoding =System.Text.Encoding.UTF8;
Response.ContentType = "application/msword"; 
Response.WriteFile(strFile);

Answer 10

注意上面的文件路径必须用Server.MapPaht(""),也就是相对路径得到