ASP. NET fileupload

CopyCode The Code is as follows: <Table Style = "width: 100%">
<Tr>
<TD>
<Asp: validationsummary id = "validationsummary1" runat = "server"/>
<Br/>
<Asp: fileupload id = "fileupload1" runat = "server"/>
<Asp: button id = "btn_upload" runat = "server" onclick = "btn_upload_click"
TEXT = "Upload"/>

<Asp: customvalidator id = "customvalidator1" runat = "server"
Controltovalidate = "fileupload1" display = "static"
Errormessage = "You shocould only can upload image file such as files with. jpg or GIF extension"
Onservervalidate = "image_validate"> * </ASP: customvalidator>
</TD>
</Tr>
</Table>

Add to code behind CS File Copy code The Code is as follows: using system;
Using system. Data;
Using system. configuration;
Using system. collections;
Using system. Web;
Using system. Web. Security;
Using system. Web. UI;
Using system. Web. UI. webcontrols;
Using system. Web. UI. webcontrols. webparts;
Using system. Web. UI. htmlcontrols;
Using system. IO;
Using system. drawing;
Public partial class practice_fileupload: system. Web. UI. Page
{
Protected void page_load (Object sender, eventargs E)
{
}
Protected void btn_upload_click (Object sender, eventargs E)
{
If (page. isvalid)
{
String Path = @ page. mappath ("user_edit.aspx"). Replace ("user_edit.aspx", "") + "Documents \\";
String S = path + session ["username"]. tostring ();
If (! System. Io. Directory. exists (path + session ["username"]. tostring ()))
{
System. Io. Directory. createdirectory (path + session ["username"]. tostring ());
}
If (fileupload1.hasfile)
{
Fileupload1.saveas (server. mappath ("~ /Seeker/documents/"+ session [" username "]. tostring () +"/"+ this. fileupload1.filename ));
}
}
}
Protected void image_validate (Object source, servervalidateeventargs ARGs)
{
String fileext = path. getextension (fileupload1.filename). tolower ();
String filename = path. getfilename (fileupload1.filename );
If (fileext! = ". Jpg" & fileext! = ". GIF ")
{
Args. isvalid = false;
}
}
Protected void customvalidator2_servervalidate (Object source, servervalidateeventargs ARGs)
{
Bitmap BMIP = new Bitmap (fileupload1.postedfile. inputstream );
If (BMIP. width> 100 | BMIP. Height> 100)
{
Args. isvalid = false;
}
Else
{
Args. isvalid = true;
}
}
}

The default size of files uploaded by the fileupload control is 4 MB. This solution was found from the Internet.
It is worth noting that the maximum size of the file to be uploaded by default is 4 MB. This is found online.
If you want to add one, you can modify it in machine. config. Copy code The Code is as follows: Executiontimeout = "110" [in seconds] [number
Maxrequestlength = "4096" [number]
Requestlengthdiskthreshold = "80" [number]
Usefullyqualifiedredirecturl = "false" [true | false]
Minfreethreads = "8" [number]
Minlocalrequestfreethreads = "4" [number]
Apprequestqueuelimit = "5000" [number]
Enablekerneloutputcache = "true" [true | false]
Enableversionheader = "true" [true | false]
Apartmentthreading = "false" [true | false]
Requirerootedsaveaspath = "true" [true | false]
Enable = "true" [true | false]
Sendcachecontrolheader = "true" [true | false]
Shutdowntimeout = "90" [in seconds] [number]
Delaynotificationtimeout = "5" [in seconds] [number]
Waitchangenotification = "0" [number]
Maxwaitchangenotification = "0" [number]
Enableheaderchecking = "true" [true | false]
/>