Hello, tjbishop!
You can use method AddScript of X class.
X.AddScript("alert('Message')");
Example
Master page:
<%@ Master Language="C#"%>
<!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>Ext.Net Example</title>
</head>
<body>
<form runat="server">
<ext:ResourceManager runat="server" />
<asp:ContentPlaceHolder ID="ContentPlaceHolder1" runat="server" />
</form>
</body>
</html>
Content page:
<%@ Page Title="" Language="C#" MasterPageFile="~/Premium help/_Work.Master" %>
<script runat="server">
protected void Update_Handler(object sender, DirectEventArgs e)
{
X.AddScript("Ext.Msg.alert('Server Update', 'Hello from server! Here is your js code!')");
}
</script>
<asp:Content ContentPlaceHolderID="ContentPlaceHolder1" runat="server">
<ext:TaskManager ID="TaskManager1" runat="server">
<Tasks>
<ext:Task TaskID="testTask" AutoRun="false">
<DirectEvents>
<Update OnEvent="Update_Handler" Success="#{TaskManager1}.stopTask('testTask');"/>
</DirectEvents>
</ext:Task>
</Tasks>
</ext:TaskManager>
<ext:Button runat="server" Text="Start Task">
<Listeners>
<Click Handler="#{TaskManager1}.startTask('testTask');" />
</Listeners>
</ext:Button>
</asp:Content>