Quote Originally Posted by Baidaly View Post
It seems Ext.NET 2.0 has the bug, so you wrap TirggerCls value by quotes. Use the following:

<%@ Page Language="C#" %>
  
<%@ Register Assembly="Ext.Net" Namespace="Ext.Net" TagPrefix="ext" %>
  
<!DOCTYPE html>
<html>
<head runat="server">
    <title>Ext.NET v2 Example</title>
  
    <style>
        .my-icon {
            background-image: url(https://examples2.ext.net/Examples/Form/TriggerField/Custom_Icon/resources/images/custom-trigger.gif);
        }
    </style>
</head>
<body>
    <form runat="server">
        <ext:ResourceManager runat="server" />
          
        <ext:ComboBox runat="server" TriggerCls="'my-icon'" />
    </form>
</body>
</html>
Baidaly, This is working thank you. You can to close this thred.