Dear mferrell3,
Please follow steps:
1. Save the following code to default.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script type="text/javascript">
function CuteWebUI_AjaxUploader_OnError(msg) {
alert(1);
return false;
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<CuteWebUI:UploadAttachments ShowFrameBrowseButton="false" InsertText="Upload Multiple files Now" runat="server"
ID="Attachments1" onfilevalidating="Attachments1_FileValidating" MultipleFilesUpload="true" >
</CuteWebUI:UploadAttachments>
</div>
</form>
</body>
</html>
2. Save the following code to default.aspx.cs
using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Attachments1_FileValidating(object sender, CuteWebUI.UploaderEventArgs args)
{
throw new Exception("test");
}
}
3. Run default.aspx and upload one file, you will find CuteWebUI_AjaxUploader_OnError will be fired.
Please check your snippet, check whether the highlighted line is called:
if (System.IO.File.Exists(ResourceFilePath + "Skin\\" + Skin.Id + "\\" + args.FileName))
{
ErrorTextBox.Text = "file name error";
throw new Exception("test");
}
Thank you for asking