Upload: (multiple files can be uploaded in sequence)
Front-end:
<% @ Register tagprefix = "ew1" namespace = "eWorld. UI" assembly = "eWorld. UI, version = 1.9.0.0, culture = neutral, publickeytoken = 24d65337282035f2" %>
<% @ Page Language = "C #" codebehind = "webnewbid. aspx. cs" autoeventwireup = "false" inherits = "star. Web. Main. Bidding. webnewbid" %>
<! Doctype HTML public "-// W3C // dtd html 4.0 transitional // en">
<HTML>
<Head>
<Title> webnewbid </title>
<Meta content = "Microsoft Visual Studio. NET 7.1" name = "generator">
<Meta content = "C #" name = "code_language">
<Meta content = "JavaScript" name = "vs_defaultclientscript">
<Meta content ="Http://schemas.microsoft.com/intellisense/ie5"Name =" vs_targetschema ">
<Link href = ".../../CSS/style.css" type = "text/CSS" rel = "stylesheet">
<Script language = "JavaScript">
Function AddFile ()
{
VaR STR = '<br> <input type = "file" size = "50" name = "file" runat = "server">'
Document. getelementbyid ('myfile'). insertadjacenthtml ("beforeend", STR)
}
</SCRIPT>
</Head>
<Body ms_positioning = "gridlayout">
<Form ID = "form1" method = "Post" runat = "server">
<Table class = "fullwidth" align = "center">
<Tr>
<TD valign = "TOP"> attachment: </TD>
<TD>
<P id = "myfile"> <input id = "filmyfile" type = "file" size = "50" name = "filmyfile"> & nbsp; <input onclick = "AddFile ()" type = "button" value = "add"> </P>
<Asp: Label id = "lblattachmenterror" runat = "server" forecolor = "red"> </ASP: Label> <br>
<Asp: button id = "btnupload" runat = "server" text = "Upload"> </ASP: button> <asp: label id = "lblattachment" runat = "server"> </ASP: Label> </TD>
</Tr>
</Table>
</Form>
</Body>
</Html>
Background:
Using system;
Using system. collections;
Using system. componentmodel;
Using system. Data;
Using system. Data. sqlclient;
Using system. drawing;
Using system. Web;
Using system. Web. sessionstate;
Using system. Web. UI;
Using system. Web. UI. webcontrols;
Using system. Web. UI. htmlcontrols;
Using system. Collections. Specialized;
Private void btnupload_click (Object sender, system. eventargs E)
{
Httpfilecollection files = httpcontext. Current. Request. files;
For (INT I = 0; I <files. Count; I ++)
{
If (I <files. Count & I <10)
{
If (files [I]. filename! = "" | Files [I]! = NULL)
{
Int filesize = 6*1024*1024;
Httppostedfile myfile = files [I];
String strfilepath = myfile. filename. tostring (). Trim ();
This. lblattachmenterror. Text = "<" + strfilepath + ">"; // show file name
Int nfindslashpos = strfilepath. Trim (). lastindexof ("// ") + 1;
String uploadfilename = strfilepath. substring (nfindslashpos );
String filename=this.txt workorder. Text + "_" + String. Format ("{0: yymmdd-hhmmss}", datetime. Now) + "_" + uploadfilename;
If (myfile. filename. Trim () = "") // empty value in browse box
{
This. lblattachmenterror. Text = "no file selected .";
Return;
}
If (myfile. contentlength! = 0)
{
If (myfile. contentlength> filesize)
{
This. lblattachmenterror. Text = "file size is limited to 6 MB only .";
Return;
}
This. lblattachment. Text + = "<br>" + filename;
This. lblattachmenterror. Text = "";
// String S = This. Request. physicalapplicationpath. tostring (). Trim ();
// String S1 = This. Request. applicationpath. tostring (). Trim ();
// String S3 = This. server. mappath ("");
Myfile. saveas (this. Request. physicalapplicationpath. tostring (). Trim () + @ "/uploads/" + filename );
Arrayfilename [I] = filename;
//// Return;
}
Else
{
This. lblattachmenterror. Text = "file not found .";
Return;
}
}
}
Else
This. lblattachmenterror. Text = "uploaded file exceed limits .";
}
}
Download: (I only gave the latter code)
Public bool responsefile (httprequest _ Request, httpresponse _ response, string _ filename, string _ fullpath, long _ speed)
{
Try {
Filestream myfile = new filestream (_ fullpath, filemode. Open, fileaccess. Read, fileshare. readwrite );
Binaryreader BR = new binaryreader (myfile );
Try {
_ Response. addheader ("Accept-ranges", "bytes ");
_ Response. Buffer = false;
Long filelength = myfile. length;
Long startbytes = 0;
Int16 Packs = 10240;
Int16 sleep = convert. toint16 (math. Floor (1000 * pack/_ speed) + 1 );
If (! (_ Request. headers ("range") = NULL )){
_ Response. statuscode = 206;
Char [] splitchar = new char [1];
Splitchar (0) = "= ";
Splitchar (1) = "-";
String [] [0] range = _ request. headers ("range"). Split ("");
Startbytes = convert. toint64 (range (1 ));
}
_ Response. addheader ("Content-Length", (filelength-startbytes). tostring ());
If (startbytes! = 0 )){
_ Response. addheader ("content-range", String. Format ("bytes {0}-{1}/{2}", startbytes, filelength-1, filelength ));
}
_ Response. addheader ("connection", "keep-alive ");
_ Response. contenttype = "application/octet-stream ";
_ Response. addheader ("content-disposition", "attachment; filename =" + httputility. urlencode (_ filename, system. Text. encoding. utf8 ));
BR. basestream. Seek (startbytes, seekorigin. Begin );
Long maxcount = convert. toint64 (math. Floor (filelength-startbytes)/Pack) + 1 );
Long I;
For (INT I = 0; I <= maxcount; I ++ ){
If (_ response. isclientconnected )){
_ Response. binarywrite (Br. readbytes (pack ));
Thread. Sleep (sleep );
} Else {
I = maxcount;
}
}
} Catch (exception e ){
Return false;
} Finally {
BR. Close ();
Myfile. Close ();
}
} Catch {
Return false;
}
}
Start building with 50+ products and up to 12 months usage for Elastic Compute Service
1 on 1 presale consultation
24/7 Technical Support 6 Free Tickets per Quarter Faster Response
Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.
A comprehensive suite of global cloud computing services to power your business
Payment Methods We Support
