Hi steveyuan,
If you use property InsertButtonID, please set this control directly
<%@ Page Language="C#" %>
<%@ Register TagPrefix="CuteWebUI" Namespace="CuteWebUI" Assembly="CuteWebUI.AjaxUploader" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
protected override void OnPreRender(EventArgs e)
{
base.OnPreRender(e);
if (GetVisibleItemCount() >= 3)
{
button1.Enabled = false;
}
else
{
button1.Enabled = true;
}
}
int GetVisibleItemCount()
{
int count = 0;
foreach (AttachmentItem item in uploader1.Items)
{
if (item.Visible)
count++;
}
return count;
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>example</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<CuteWebUI:UploadAttachments ID="uploader1" runat="server" InsertButtonID="button1">
</CuteWebUI:UploadAttachments>
<asp:Button ID="button1" runat="server" Text="upload files" />
</div>
</form>
</body>
</html>
Regards,
Ken