Dear soppie,
Yes, you can check the filesize before file is uploaded, the following is example snippet:
<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
void InsertMsg(string msg)
{
ListBoxEvents.Items.Insert(0, msg);
ListBoxEvents.SelectedIndex = 0;
}
void Uploader_FileUploaded(object sender, UploaderEventArgs args)
{
Uploader uploader = (Uploader)sender;
InsertMsg("File uploaded! " + args.FileName + ", " + args.FileSize + " bytes.");
//Copys the uploaded file to a new location.
//args.CopyTo("c:\\temp\\"+args.FileName);
//You can also open the uploaded file's data stream.
//System.IO.Stream data = args.OpenStream();
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>Simple Upload with Progress</title>
<link rel="stylesheet" href="demo.css" type="text/css" />
</head>
<body>
<form id="form1" runat="server">
<div class="content">
<h2>
Simple Upload with Progress</h2>
<p>
A basic sample demonstrating the use of the Upload control.</p>
<CuteWebUI:Uploader runat="server" ID="Uploader1" InsertText="Upload File (Max 1M)"
OnFileUploaded="Uploader_FileUploaded">
<ValidateOption MaxSizeKB="1024" />
</CuteWebUI:Uploader>
<br />
<br />
<div>
Server Trace:
<br />
<asp:ListBox runat="server" ID="ListBoxEvents" Width="400"></asp:ListBox>
</div>
</div>
</form>
<script type="text/javascript">
//validate the extensions in client side
//this way is not safe , just for performance
//try to disable it to test the server validation
var useclientvalidation = true;
function CuteWebUI_AjaxUploader_OnSelect(files) {
if (useclientvalidation) {
for (var i = 0; i < files.length; i++) {
var item = files[i];
var size = item.FileSize;
if (size>1024*1024) {
alert("cannot be uploaded!File size is too large. The maximum file size allowed is set to 1024KB!");
return false;
}
}
}
}
</script>
</body>
</html>
Thank you for asking