<%@ Page Language="vb" AutoEventWireup="false" Codebehind="Default.aspx.vb" Inherits="PageMethodsDemo._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>Untitled Page</title>
<script type="text/javascript">
Function Add()
{
var x = $get("txtX").value;
var y = $get("txtY").value;
PageMethods.AddNumbers(x,y,OnSucceeded,OnFailed);
}
function OnSucceeded(result) {
$get("lblResult").innerHTML = result;
}
function OnFailed(error) {
// Alert user to the error.
alert(error.get_message());
}
</script>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server" EnablePageMethods="true" />
<div>
<asp:TextBox ID="txtX" runat="server"></asp:TextBox>
+
<asp:TextBox ID="txtY" runat="server"></asp:TextBox>
=
<asp:Label ID="lblResult" runat="server"></asp:Label><br />
<asp:Button ID="btnAdd" runat="server" OnClientClick="Add(); return false;" Text="Add" />
</div>
</form>
</body>
</html>
Imports System.Web.Services
Partial Public Class _Default
Inherits System.Web.UI.Page
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
End Sub
<WebMethod()> _
Public Shared Function AddNumbers(ByVal x As Integer, ByVal y As Integer) As Integer
If Not IsNumeric(x) AndAlso Not IsNumeric(y) Then
Throw New Exception()
End If
Return x + y
End Function
End Class
