We can call page methods (static methods declared in the scope of asp.net page) using the MS Ajax framework for ASP.NET. That is how can we do it
- Drop
ScriptManagercontrol on page - Set
EnablePageMethodsproperty ofScriptManagercontrol to true - Add static public method in page-behind code (or its parent class) and mark it with
[System.Web.Services.WebMethod]attribute - Add following javascript code to it
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default2.aspx.cs" Inherits="Default2" %>
<!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 CallMethod()
{
GetTime();
}
function GetTime()
{
PageMethods.GetTime(GetTimeCallback,ErrorHandler,TimeOutHandler);
}
function TimeOutHandler(result)
{
alert("Timeout :" + result);
}
/// <summary>
/// Callback function invoked on failure of the page method
/// </summary>
function ErrorHandler(result)
{
var msg=result.get_exceptionType() + "\r\n";
msg += result.get_message() + "\r\n";
msg += result.get_stackTrace();
alert(msg);
}
GetTimeCallback = function (result) {
/// <summary>
/// Is called when server sent result back
/// </summary>
/// <param name="result">
/// Result of calling server method,
/// string - server time
/// </param>
if(result) {
$get("resultDiv").innerHTML = result;
}
}
</script>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager EnablePageMethods="true" ID="MainSM" runat="server" ScriptMode="Release"
LoadScriptsBeforeUI="true">
</asp:ScriptManager>
<div id="resultDiv">
</div>
<input value="GetTime" type="button" onclick="GetTime();" />
</form>
</body>
</html>
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class Default2 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
[System.Web.Services.WebMethod]
public static string GetTime()
{
return DateTime.Now.ToString();
}
}