Please refer to the following code:
<script runat="server">
protected override void OnInit(EventArgs e)
{
Attachments1.InsertButton.Style["display"] = "none";
}
void Uploader_FileUploaded(object sender, UploaderEventArgs args)
{
using (System.IO.Stream stream = args.OpenStream())
{
Attachments1.Upload(args.FileSize, "ChangeName-" + args.FileName, stream);
}
}
</script>
<html xmlns="
http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Uploading multiple files</title>
<link rel="stylesheet" href="demo.css" type="text/css" />
</head>
<body>
<form id="form1" runat="server">
<div class="content">
<h2>
Uploading multiple files (Limit the maximum allowed number of files to be uploaded)</h2>
<p>
This example shows you how to limit the maximum allowed number of files to be uploaded.
In the following example, you can only upload 3 files.</p>
<br />
<fieldset style="height: 130px">
<legend>
<CuteWebUI:Uploader runat="server" ID="Uploader1" InsertText="Upload Multiple files Now"
MultipleFilesUpload="true" OnFileUploaded="Uploader_FileUploaded">
<ValidateOption AllowedFileExtensions="txt" />
</CuteWebUI:Uploader>
</legend>
<div>
<CuteWebUI:UploadAttachments runat="server" ID="Attachments1" >
</CuteWebUI:UploadAttachments>
</div>
</fieldset>
</div>
</form>
</body>
</html>
Regards,
Eric