文件上传和下载

(一).上传
1. 
<INPUT   id= "WebFile "   style= "WIDTH:   490px;   HEIGHT:   22px "   type= "file "   size= "62 "   name= "WebFile "   runat= "server ">
protected   System.Web.UI.HtmlControls.HtmlInputFile   WebFile;
文件上传参考代码:
///   <summary>
///   文件上传
///   </summary>
///   <param   name= "sender "> </param>
///   <param   name= "e "> </param>
private   void   BtnUpload_Click(object   sender,   System.EventArgs   e)
{
if(WebFile.PostedFile.FileName== " ")
{
Info.Text= "请先选择要上传的文件 ";
return;
}

try
{
char[]   spliter   =   { '// '};
string   []   FileName   =   WebFile.PostedFile.FileName.Split(spliter,10);

string   FullPath   =   CurrentPath   +   @ "/ "   +   FileName[FileName.Length-1];     //生成完整文件名
WebFile.PostedFile.SaveAs(FullPath);     //保存文件
LoadDir(CurrentPath);     //重新载入当前目录
}
catch
{
Info.Text= "上传文件失败，请与管理员联系 ";
}
}

2.
  http://www.gdcic.net/dotnetBank/ViewContent.aspx?artid=000000000186

(二).下载

1.   C#:  
///   <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();
}


2.   vb.net
Public   Sub   WriteDLWindow(ByVal   strFileName   As   String,   ByVal   page   As   System.Web.UI.Page)
                Try
                      If   File.Exists(page.MapPath(strFileName))   Then
                              Dim   TargetFile   As   FileInfo   =   New   FileInfo(page.MapPath(strFileName))
                              '清除缓冲区流中的所有内容输出.
                              page.Response.Clear()
                              '向输出流添加HTTP头   [指定下载/保存   对话框的文件名]
                              page.Response.AppendHeader( "Content-Disposition ",   "attachment;   filename= "   +   page.Server.UrlEncode(TargetFile.Name))

'繁体格式
                                'page.Response.AppendHeader( "Content-Disposition ",   "attachment;filename= "   +   HttpUtility.UrlEncode(strFileName,   System.Text.Encoding.UTF8))

                                '向输出流添加HTTP头   [指定文件的长度,这样下载文件就会显示正确的进度
                                page.Response.AppendHeader( "Content-Length ",   TargetFile.Length.ToString())
                                '表明输出的HTTP为流[stream],因此客户端只能下载.
                                page.Response.ContentType   =   "application/octet-stream "
                                '发送文件流到客户端.
                                page.Response.WriteFile(TargetFile.FullName)
                                '停止执行当前页
                                page.Response.End()
                        End   If
                Catch   ex   As   Exception
                        Throw   ex
                End   Try
        End   Sub

  Set   save   file   format:  
  Response.ContentType   =   "application/ms-excel ";